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4790K - need air cooling advise

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  • Cooling
  • CPUs
  • Temperature
Last response: in CPUs
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July 6, 2014 12:14:03 AM

Hey guys!

So a few days ago I finally got my 4790K in the mail, and I'm hot exactly happy with the temperatures I'm now getting. Background:
I used to have 2600K not OC'd on 3.8 Ghz cooled by Hyper 212+ with one fan, temperatures on idle were 27-30c and 60-70c under load in corsair 650D, mobo is Asus Z97 Deluxe. I also had GTX 780 Ti in SLI which I had trouble cooling, but resolved it by turning 212+ to face the front of the case instead of down on the GPUs, so all was good.

Now I upgraded that to 4790K with a new Hyper 212 EVO to which I added a second fan (Noctua NF-F12), expecting the thing to run even cooler than my 2600K for OC'ing, but I immediately noticed that it wasn't the case - idle temps were 49-53c and it quickly reached 85-90c under heavy load, all under 4.4 Ghz. I figured something is wrong with the heatsink so I re-attached it and re-applied thermal paste, but temps remained. Worth noting, in BIOS it's 40c. I also noticed that the CPU wouldn't downclock when idle and remained at 4.4GHz, and thinking that's the problem I edited windows (8.1) power settings. It started to scale down the power, but it barely helped, making temps stay below 90c. Even at lowered voltage it never went below 48c. At first I measured with Ai Suite 3 which actually shows around 40c, but then I tried HWMonitor and Real Temp, both of which showed the temps I wrote about above.

I also noticed that while playing BF4 (heavy load on the components, resolution is 4K) one GPU (I'm guessing the upper one) quickly reaches 91c and stays there, while the second one is around 65c. I'm not happy with that first temp either. I'm guessing it's because of the CPU which is so much hotter now since the upper GPU is close to it's heatsink.

Any ideas on what could this be? I'm frankly puzzled. Is it the new CPU architecture and all is normal, or should I be worried? I'm not familiar with anything after Sandy Bridge, but I heard that it runs hotter, just didn't expect it to be THIS hot. I thought about water cooling, but frankly I'm scared to try that since I don't know anything about it and heard about the leaks problems and stuff.

More about : 4790k air cooling advise

a c 912 à CPUs
July 6, 2014 12:32:46 AM

Cooler fans set up in push pull?
What is the airflow configuration in your case?
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July 6, 2014 12:36:02 AM

rolli59 said:
Cooler fans set up in push pull?
What is the airflow configuration in your case?


Sorry I forgot to mention that, but yes, it's push/pull now. CPU fans push air out to the exhaust case fan in the back. I got 2 Noctua 140mm fans sucking air on top of the case, and that's pretty much it. My front case fan (200mm) never worked, and I just didn't care since the temps were more than enough for me. Now I'm thinking about replacing it with something that'll work, but frankly I doubt that it'll help with cooling anything besides maybe the HDDs in front of it, and will just add noise.
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a b à CPUs
July 6, 2014 12:39:00 AM

So, the only air that enters your case is the air that the Noctua's pull up and over your CPU from your two g-cards?
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a b à CPUs
July 6, 2014 12:40:10 AM

You need MORE air being sucked into the case then blown out of it - this builds pressure in the case which helps the exhaust fans do their job of expelling hot air.

So get some really good front-of-case and possibly side-of-case intake fans!!
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July 6, 2014 1:04:45 AM

FoxVoxDK said:
So, the only air that enters your case is the air that the Noctua's pull up and over your CPU from your two g-cards?


Yes, that is correct. Air is only getting sucked in from the top of the case.

snowctrl said:
You need MORE air being sucked into the case then blown out of it - this builds pressure in the case which helps the exhaust fans do their job of expelling hot air.

So get some really good front-of-case and possibly side-of-case intake fans!!


I understand that this is not the best way to do it, that is, without the front case fan. However I've been doing it for a couple of years now, and all was good. I just have a hard time believing that getting 2x higher temperatures with the new CPU will be fixed by installing one extra intake fan. Does it mean that 2600K would have been at, like, 10c if i had it installed? :pt1cable:  Speaking of side case fans, I don't know anything about them and not sure if they'll fit in my case.

I just don't want to spend more money only to be disappointed by the result.
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a c 912 à CPUs
July 6, 2014 1:06:53 AM

Andrey Rybakov said:
rolli59 said:
Cooler fans set up in push pull?
What is the airflow configuration in your case?


Sorry I forgot to mention that, but yes, it's push/pull now. CPU fans push air out to the exhaust case fan in the back. I got 2 Noctua 140mm fans sucking air on top of the case, and that's pretty much it. My front case fan (200mm) never worked, and I just didn't care since the temps were more than enough for me. Now I'm thinking about replacing it with something that'll work, but frankly I doubt that it'll help with cooling anything besides maybe the HDDs in front of it, and will just add noise.


Top fans exhausting? Which would be correct!
If that is the case then you need Intake in the front.
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July 6, 2014 1:09:00 AM

rolli59 said:
Andrey Rybakov said:
rolli59 said:
Cooler fans set up in push pull?
What is the airflow configuration in your case?


Sorry I forgot to mention that, but yes, it's push/pull now. CPU fans push air out to the exhaust case fan in the back. I got 2 Noctua 140mm fans sucking air on top of the case, and that's pretty much it. My front case fan (200mm) never worked, and I just didn't care since the temps were more than enough for me. Now I'm thinking about replacing it with something that'll work, but frankly I doubt that it'll help with cooling anything besides maybe the HDDs in front of it, and will just add noise.


Top fans exhausting? Which would be correct!
If that is the case then you need Intake in the front.


No, top fans are both intake. Blowing cold air right at the CPU heatsink.
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a c 912 à CPUs
July 6, 2014 1:09:27 AM

Andrey Rybakov said:
FoxVoxDK said:
So, the only air that enters your case is the air that the Noctua's pull up and over your CPU from your two g-cards?


Yes, that is correct. Air is only getting sucked in from the top of the case.

snowctrl said:
You need MORE air being sucked into the case then blown out of it - this builds pressure in the case which helps the exhaust fans do their job of expelling hot air.

So get some really good front-of-case and possibly side-of-case intake fans!!


I understand that this is not the best way to do it, that is, without the front case fan. However I've been doing it for a couple of years now, and all was good. I just have a hard time believing that getting 2x higher temperatures with the new CPU will be fixed by installing one extra intake fan. Does it mean that 2600K would have been at, like, 10c if i had it installed? :pt1cable:  Speaking of side case fans, I don't know anything about them and not sure if they'll fit in my case.

I just don't want to spend more money only to be disappointed by the result.

Top fans are creating your issue if they are used for intake have to be exhaust! Hot air rises and you are forcing it back down to the components!
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July 6, 2014 1:13:40 AM

rolli59 said:
Andrey Rybakov said:
FoxVoxDK said:
So, the only air that enters your case is the air that the Noctua's pull up and over your CPU from your two g-cards?


Yes, that is correct. Air is only getting sucked in from the top of the case.

snowctrl said:
You need MORE air being sucked into the case then blown out of it - this builds pressure in the case which helps the exhaust fans do their job of expelling hot air.

So get some really good front-of-case and possibly side-of-case intake fans!!


I understand that this is not the best way to do it, that is, without the front case fan. However I've been doing it for a couple of years now, and all was good. I just have a hard time believing that getting 2x higher temperatures with the new CPU will be fixed by installing one extra intake fan. Does it mean that 2600K would have been at, like, 10c if i had it installed? :pt1cable:  Speaking of side case fans, I don't know anything about them and not sure if they'll fit in my case.

I just don't want to spend more money only to be disappointed by the result.

Top fans are creating your issue if they are used for intake have to be exhaust! Hot air rises and you are forcing it back down to the components!


Hmm. Makes sense, actually. I just don't understand why it was all good before. I even improved the temperatures when I installed those top fans by a few degrees, before that there was one 200mm corsair fan which also didn't work :( :??: 

I tried going for this type of cooling setup, but obviously without front intake.

So I should order a new front case fan, set it to intake and then set both top ones to exhaust?
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a b à CPUs
July 6, 2014 1:17:53 AM

Ok, just so that we're on the same page.

The rear fan sucks air OUT of the case and the to top fans suck air IN?

If this is the case, have the rear fan suck air IN and the two top fans sucking air OUT.
This, for starters to give better circulation around your CPU cooler.

Still you NEED a greater airflow in a case with two GFX cards of that caliber.

You can buy a Cooler Master Megaflow 200 as a front intake fan, they're fairly cheap and move a decent amount of air.
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a c 912 à CPUs
July 6, 2014 1:19:57 AM

What happens with your airflow is that you have a dead spot at the bottom making the GPU's hot. Most of your intake air at the top exhaust through the back.
Putting in an 200mm intake in the front would do good but you should see better temps just by reversing the top fans.
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July 6, 2014 1:29:59 AM

FoxVoxDK said:
Ok, just so that we're on the same page.

The rear fan sucks air OUT of the case and the to top fans suck air IN?

If this is the case, have the rear fan suck air IN and the two top fans sucking air OUT.
This, for starters to give better circulation around your CPU cooler.

Still you NEED a greater airflow in a case with two GFX cards of that caliber.

You can buy a Cooler Master Megaflow 200 as a front intake fan, they're fairly cheap and move a decent amount of air.


I'm thinking about Bitfenix 200mm since it's also 20mm thick while Megaflow is 30mm, it won't fit in my case :( 
And speaking of circulation, I really don't want to mess with the rear fan. It's been setup like this since, well, forever, and I'd rather leave it there. Adding front intake and making top fans exhaust will do the job, right?

rolli59 said:
What happens with your airflow is that you have a dead spot at the bottom making the GPU's hot. Most of your intake air at the top exhaust through the back.
Putting in an 200mm intake in the front would do good but you should see better temps just by reversing the top fans.


Alright, thank you very much for your input. That makes sense, I'll try it ASAP.

Another question to everyone is, are the CPU temps normal by themselves? I mean, even if I take off the case wall and make GPUs go cold (down to 40c both), CPU still stays at 50c, on idle.
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a b à CPUs
July 6, 2014 1:38:03 AM

Andrey Rybakov said:
FoxVoxDK said:
Ok, just so that we're on the same page.

The rear fan sucks air OUT of the case and the to top fans suck air IN?

If this is the case, have the rear fan suck air IN and the two top fans sucking air OUT.
This, for starters to give better circulation around your CPU cooler.

Still you NEED a greater airflow in a case with two GFX cards of that caliber.

You can buy a Cooler Master Megaflow 200 as a front intake fan, they're fairly cheap and move a decent amount of air.


I'm thinking about Bitfenix 200mm since it's also 20mm thick while Megaflow is 30mm, it won't fit in my case :( 
And speaking of circulation, I really don't want to mess with the rear fan. It's been setup like this since, well, forever, and I'd rather leave it there. Adding front intake and making top fans exhaust will do the job, right?


Yes, it should work nicely, the reason that I would have you turn the rear fan sucking air in, is to create more movement of air in your case, but it would yield negligible results I believe, but it's always worth trying, you can always shift them back.

Your CPU temps are much too high imo, and something else might be wrong there, broken retention bar or bad contact between Cooler and CPU.
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a c 912 à CPUs
July 6, 2014 1:54:47 AM

Back (usually located high) and top exhaust, front and side Intake! Basically the rule of cooling based on physics.
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July 10, 2014 9:05:47 AM

So, update time: I finally had fans delivered today. Easily replaced rear fan with a Noctua one and turned both top ones to do exhaust instead of intake, but I couldn't fit the front Bitfenix. Turns out this model (Spectre 200x200x20) is indeed thin enough for Corsair 650D, however no one mentioned that it only has holes for screws on one side, and if you put it on like that it'll be doing exhaust. If you turn it around to do intake, there are no holes. I tried to find screws long enough to fit anyway, but couldn't, so I can either place it as exhaust making every fan in my case exhaust which I think is a bad idea, or order a thicker fan and try to fit that in. Chose the latter.

Speaking of temps, I tried booting once again without any front fan, and now that both rear and top fans are exhaust, temps seem to have improved. CPU still idles at 49c, but it never went above 85c under load, and GPUs seem to not reach 70c as well, making it way better at least by initial impression. I'll update with more info once I get a new front fan that hopefully fits, because right now I don't have any intake at all.
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a b à CPUs
July 10, 2014 9:13:40 AM

That's still way too high, though. Did you try leaving the case open already? That would (temporarily) fix the need for working case fans.
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July 10, 2014 10:33:32 AM

DubbleClick said:
That's still way too high, though. Did you try leaving the case open already? That would (temporarily) fix the need for working case fans.


It is high for CPU, but I'm happy with GPU temps. Could be lower, but not critical at least. Yes, I did try leaving the case open, but even then CPU won't drop below 45c.
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a b à CPUs
July 10, 2014 10:15:59 PM

I just wonder why the hyper 212+ is having trouble with an 88W tdp CPU. D:
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July 10, 2014 11:06:31 PM

FoxVoxDK said:
I just wonder why the hyper 212+ is having trouble with an 88W tdp CPU. D:


It's actually Hyper 212 Evo, not that it matters much :) 

But that's the question I've been asking myself for a while now...maybe faulty CPU unit...but that would suck a lot since I don't exactly want to ship it back to Amazon for a new one.
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a c 912 à CPUs
July 10, 2014 11:26:15 PM

I would try reseating the cooler and am presuming that your push pull is from the front of the case towards the back.
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July 11, 2014 12:42:29 AM

rolli59 said:
I would try reseating the cooler and am presuming that your push pull is from the front of the case towards the back.


Yes, that's correct. Although I really don't want to reseat it since I already did it and I'm 100% sure that it's seated properly. I change paste and all. I'm on my way to get a fitting front cooler, will see how that works.
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July 11, 2014 2:44:40 PM

Well, I finally got and installed a 200mm fan on the front for intake. Left the system run CPU+GPU stress test in Aida64 for a few minutes, and came back to see...

No real improvement. Upper GPU was at 80c which is acceptable for me but not great, and CPU reached 87-88c which is about 20c hotter than what I'd like it to be. I'm pretty much ready to give up. Are Haswells really THAT much hotter than Sandy Bridge? Or is my unit defective? Because the cooling is heaps and bounds ahead of what I've had a while ago, yet temps are way worse.
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a c 912 à CPUs
July 13, 2014 3:44:58 AM

If the cooler is properly seated it looks like you got unlucky with a CPU. Try RMA on it.
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July 13, 2014 5:41:05 AM

rolli59 said:
If the cooler is properly seated it looks like you got unlucky with a CPU. Try RMA on it.


That's probably the case. I don't want to RMA though since I got it from Amazon and I live in Moscow, meaning all the shipping hassle will take too long. Besides, I don't have my old CPU anymore, and I'm pretty tired of this mess so I'll just let it be. The temps are at least not critical and it'll hopefully serve me well for a long time.

4Ryan6 said:
This may help your understanding when it comes to overclocking your CPU and it's limitations, as many are running into the exact same results, not only as other reviewers have discovered, but new buyers as well.

http://www.anandtech.com/show/8227/devils-canyon-review-intel-core-i7-4790k-and-i5-4690k


Thanks for that link! It does seem that this thing runs hot for others too, and since I'm on a rather cheap (though great) air cooling setup, I guess I shouldn't expect wonders from it. I'm just worried about the fact that their temps of around 88c are during OC to 4.7Ghz and such, while I'm on stock settings of 4.0-4.4Ghz (on tubo) and get the same ones. But I guess it's no big deal unless I hit critical temps, which are if I understand correctly above 90c.

Speaking of the fans, although I did finally install a 200mm front one for intake, it's pretty much blocked by the HDD case with 5 HDDs and 1 SSD meaning not that much air gets to the other components. HDDs did drop temperatures for a good 10-15 degrees though. Also, GPUs now idle at 31c and 28c, which is pretty good, too.
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July 13, 2014 9:14:00 AM

rolli59 said:
Well you could change coolers if you got the guts for it http://pcpartpicker.com/part/noctua-cpu-cooler-nhd14


Meh. I just bought this new 212 Evo one, and reading up on this I found that benchmarks show only a couple degrees difference between it and Noctua, so I don't think it's worth the hassle.
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July 17, 2014 12:05:19 PM

Apologies for reviving this, but this has been bugging me too much. Due to a very hot weather around here, it becomes almost unbearable to be close to the PC while gaming/putting it under stress. Temps on GPUs are fine at around 75c for the upper and 54c for the lower one under load, and CPU is around 75c (unless used at 100% like during video encoding when it reaches 85-88c), the heat is very strong. The case itself is now ice-cold, when I touch the side of it with my leg it's like touching a freezer, the metal is just very, very cool on the side and bottom, however due to the top fans doing exhaust, the air becomes pretty hot above outside of it, and heats up my desk a bit. Air conditioner makes the room fairly cold, but it gets very hot around the PC itself where I sit most of the time.

Point is, I'm thinking of cashing out one last time to get watercooling for the CPU. Now I don't know a lot about it, but I have been reading up on the subject, and it seems like the closed loop solutions are the way to go with a moderately easy setup, however I could use help choosing the best for me. As I mentioned above, I have Corsair 650D as case. Coolers I got my eye on are H100i and H110. It seems that H100i is very popular, however in all the benchmarks the H110 seems to outperform it by quite a few degrees while also being a lot less loud. Problem is, it seems that H110 doesn't fit into 650D in push configuration, making putting it to intake my only option. Or I could get H110i and set it up for exhaust.

So the question is, which one should I get? Will there be a difference? Or maybe buy some other model? My main goal is a low CPU temp while being fairly quiet, no louder than Cooler Master 212 Evo that I'm currently using.
And will a closed loop watercooling solution even help me out? Because I've been reading some rather inconsistent stuff, with some people saying it's only a couple degrees difference from good air cooler like CM 212, and some saying that it's night and day. I just don't want to spend more money on this problem if the result will be anything less than 10-20c off the CPU temp (and thus off other stuff as well).

tl;dr: help me choose a CPU watercooling solution for 650D.

Thanks in advance for any replies.
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July 18, 2014 5:31:56 AM

rolli59 said:
At best the CM Hyper 212 comes close to Corsair H60 so the difference will be more than a couple of degrees http://www.hardwaresecrets.com/article/Corsair-H100i-CP...


True, but it's just weird that most benchmarks showed the big Noctua NH-D14 to only perform a few degrees colder than 212, and the H100i/H110 to only cool a bit better than Noctua, making them not far away from 212 itself. All the people who have them though report temps so low they are pretty much twice lower than mine, even though most overclock and I'm on stock.

I guess I'll shell out for H110 and see how it goes then. Just a shame to put all the extra fans I have since recently to rest already.
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a c 110 à CPUs
July 18, 2014 6:29:02 AM

Andrey Rybakov said:
rolli59 said:
At best the CM Hyper 212 comes close to Corsair H60 so the difference will be more than a couple of degrees http://www.hardwaresecrets.com/article/Corsair-H100i-CP...


True, but it's just weird that most benchmarks showed the big Noctua NH-D14 to only perform a few degrees colder than 212, and the H100i/H110 to only cool a bit better than Noctua, making them not far away from 212 itself. All the people who have them though report temps so low they are pretty much twice lower than mine, even though most overclock and I'm on stock.

I guess I'll shell out for H110 and see how it goes then. Just a shame to put all the extra fans I have since recently to rest already.


Before you spend anymore money on cooling take some time and read this.

http://www.tomshardware.com/forum/id-2196038/air-cooling-water-cooling-things.html

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a c 912 à CPUs
July 18, 2014 11:02:26 AM

Andrey Rybakov said:
rolli59 said:
At best the CM Hyper 212 comes close to Corsair H60 so the difference will be more than a couple of degrees http://www.hardwaresecrets.com/article/Corsair-H100i-CP...


True, but it's just weird that most benchmarks showed the big Noctua NH-D14 to only perform a few degrees colder than 212, and the H100i/H110 to only cool a bit better than Noctua, making them not far away from 212 itself. All the people who have them though report temps so low they are pretty much twice lower than mine, even though most overclock and I'm on stock.

I guess I'll shell out for H110 and see how it goes then. Just a shame to put all the extra fans I have since recently to rest already.


I do not know what you are using to read the temps but have you considered that the program may be wrong?
I personally use Core temp for CPU temp and there you can set offset which I have on 3 different computers as +10 to -22C to get the right temp.
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a b à CPUs
July 18, 2014 11:35:44 AM

As a last option, I'd RMA the CPU, it might have a bad solder/thermal paste under its own heat-spreader, in which case no matter what you do, it will run much hotter.
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a b à CPUs
July 18, 2014 8:22:23 PM

I have 212 Evo + 4790K ... this is what i notice
your Vcore is what driving the temp. my OC to 4.4 only ( AsRock auto tune on advance setting only)

V = 1.176 = 30-34 C degree - Idle
V = 1.225 = 62-75 C .. but once i a while will go to 81C ( full load AIDA , OCCT , HyperPI stress test)

when i have my

V=1.09 temp only 25C
V = 1.25 ... the temp shot up to 90 .. average be 68-81

i hope this help on figure out your temp.

quick note**
I had 2 fan and 1 fan set up .... i see maybe 1-2 temp different only.
also if your 2 fan 1 is faster or have different configuration .. then maybe it will created a turbulent with in the 2 fan ..

I would try just to run 1 fan stock to see there is a different
Also don't forget to go into Cmos to change your fan speed to Full

:) 
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July 21, 2014 12:19:16 PM

So, I got and installed the H110. To my big surprise, it even fit without issues right over my installed Noctuas on top, making the setup work as exhaust. Here's how it looks like:


However, the results aren't as pleasant. On stock frequencies of 4.4 Ghz (in turbo) I started at 36c idle, which however quickly turned to same old 40c once the PC warmed up. Under stress test, the result was around 70c, no more than 74c I believe. I decided to try and OC to 4.6 Ghz, and the temps jumped accordingly, moving to 89-92c under load. For now I left it at 4.5 Ghz, getting no more than 84c under stress test involving FPU in Aida64, if I only test the CPU it stays at around 74c.

This is pretty disappointing to say the least, since I keep reading reviews stating a ceiling of 64c with H100i and a 4.7 Ghz overclock (or around that), while I'm still getting higher temps on stock frequencies and with even better water cooling. Well, at least they are 100% not critical now so that I can sleep easier.

I'm pretty confident that a "faulty" CPU is to blame here, but since I'm not going to get into the whole Amazon RMA mess, I'll just leave it be until now, maybe upgrade to a better cooled case in the future. But I guess it means that I'll buy a new CPU sooner than planned, just to change this one to something working properly.

rolli59 said:


I do not know what you are using to read the temps but have you considered that the program may be wrong?
I personally use Core temp for CPU temp and there you can set offset which I have on 3 different computers as +10 to -22C to get the right temp.


I used to monitor with Asus AI Suite's Fan Expert, but now I combine that with HWMonitor. I also have Core temp and Real temp, but all of them show the same result (with the AI Suite being the exception, since it measures it differently)

FoxVoxDK said:
As a last option, I'd RMA the CPU, it might have a bad solder/thermal paste under its own heat-spreader, in which case no matter what you do, it will run much hotter.


As mentioned above, I just don't want to spend more time handling this with Amazon and the whole international shipping thing, besides I don't want to spend so much time without a working PC after all the trouble.

Godto said:
I have 212 Evo + 4790K ... this is what i notice
your Vcore is what driving the temp. my OC to 4.4 only ( AsRock auto tune on advance setting only)

V = 1.176 = 30-34 C degree - Idle
V = 1.225 = 62-75 C .. but once i a while will go to 81C ( full load AIDA , OCCT , HyperPI stress test)

when i have my

V=1.09 temp only 25C
V = 1.25 ... the temp shot up to 90 .. average be 68-81

i hope this help on figure out your temp.

quick note**
I had 2 fan and 1 fan set up .... i see maybe 1-2 temp different only.
also if your 2 fan 1 is faster or have different configuration .. then maybe it will created a turbulent with in the 2 fan ..

I would try just to run 1 fan stock to see there is a different
Also don't forget to go into Cmos to change your fan speed to Full

:) 


Thanks for your input, but I didn't notice a correlation between the voltage and the temp in my case, at least not a huge one. My voltage is auto-set, and it seems to be working properly, down to 0.600v or so during complete idle state. Right now it's around 1.040v though, I guess because the opened browser uses a few percents of CPU. I'm wondering though, how can I make it a bit more controllable and to my liking? When CPU is stressed, AI Suite shows voltages of 1200-1340v, which I think is a bit excessive on stock frequencies. And it keeps it fairly high even when I'm pretty much doing nothing. Can I change it somehow, but not to a fixed state?
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a b à CPUs
July 21, 2014 1:34:04 PM

Andrey Rybakov said:


Thanks for your input, but I didn't notice a correlation between the voltage and the temp in my case, at least not a huge one. My voltage is auto-set, and it seems to be working properly, down to 0.600v or so during complete idle state. Right now it's around 1.040v though, I guess because the opened browser uses a few percents of CPU. I'm wondering though, how can I make it a bit more controllable and to my liking? When CPU is stressed, AI Suite shows voltages of 1200-1340v, which I think is a bit excessive on stock frequencies. And it keeps it fairly high even when I'm pretty much doing nothing. Can I change it somehow, but not to a fixed state?


i don't know what mother board you use ... i had same problem at beginning .... underload my Voltage shot up to 1.3 , 1.32 .. and that was for 4.4 ... i use 4 software to check my volt and temp to make sure they all agree ...( coretemp, Realtemp , Aida , and Asrock autotune)

here the link OC to 4.5 pict https://www.flickr.com/photos/125579161@N06/14708444651...

i have Asrock z97extream 6
this is what i do

went into Bios ... set my

Cpu Ratio = x44
Caches Ratio = x44

DRam Frequency=1866 (I OC my ram little)
Cpu core Voltage Mode = Adaptive
Offsetvoltage = +0.400 ( this equal to about 1.19 - 1.2 Volt) when i do Fix Voltage ... it's the same .. i set mine for 1.16V
Cpu loadline = level 1 ( turn off LLC)

this is all i do on my OC ... everything is auto .. i even try 4.5 yesterday ( all i change the multiply to x45 only with all setting from above ) ... not bad for air

x44 = Idle = 1.175 Volt ..... 32-34C
x44 = stress = 1.224 V .... 65 - 72C .. max temp is 81

x45 = idle = 1.202 V ... 31-35C
x45 stress = 1.25 V ... 68-78C ... max temp is 88C ( for me too high on everyday so i back down to x44)

all these with Speed Step and all the stuff auto .... seem like if you set Voltage certain range and let Adaptive Voltage take over ... i guess they want a set point o begin with ... they more steady and don't fluctuate as much...

good luck and enjoy your build



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July 21, 2014 9:45:13 PM

Godto said:


i don't know what mother board you use ... i had same problem at beginning .... underload my Voltage shot up to 1.3 , 1.32 .. and that was for 4.4 ... i use 4 software to check my volt and temp to make sure they all agree ...( coretemp, Realtemp , Aida , and Asrock autotune)

here the link OC to 4.5 pict https://www.flickr.com/photos/125579161@N06/14708444651...

i have Asrock z97extream 6
this is what i do

went into Bios ... set my

Cpu Ratio = x44
Caches Ratio = x44

DRam Frequency=1866 (I OC my ram little)
Cpu core Voltage Mode = Adaptive
Offsetvoltage = +0.400 ( this equal to about 1.19 - 1.2 Volt) when i do Fix Voltage ... it's the same .. i set mine for 1.16V
Cpu loadline = level 1 ( turn off LLC)

this is all i do on my OC ... everything is auto .. i even try 4.5 yesterday ( all i change the multiply to x45 only with all setting from above ) ... not bad for air

x44 = Idle = 1.175 Volt ..... 32-34C
x44 = stress = 1.224 V .... 65 - 72C .. max temp is 81

x45 = idle = 1.202 V ... 31-35C
x45 stress = 1.25 V ... 68-78C ... max temp is 88C ( for me too high on everyday so i back down to x44)

all these with Speed Step and all the stuff auto .... seem like if you set Voltage certain range and let Adaptive Voltage take over ... i guess they want a set point o begin with ... they more steady and don't fluctuate as much...

good luck and enjoy your build



I played around with voltage, and using adaptive set it to 1.25v in BIOS. Now it tops out at 1.26 under stress, and goes down to 0.7v when idle, which I think is pretty good. Multiplier is x45. Temp on idle is still 40-42c though. Under stress, it seemed to stay at 70-74c, however I left a video encoding for the night using x264, which took around 8 hours, and left HWMonitor to monitor temps for that time. Now when I checked it, it says that max temp was 88c, which is not exactly good. I guess I'll back down to x44 myself.
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July 21, 2014 11:31:49 PM

yeah i do the Small on prime 95 and OCCT ... it get little hotter and test out more ram ... i was like you too want to be safe under 80C.

yeah Adaptive voltage seem don't make your Volt too high and they flux only very very little .. I'm glad you done and enjoy your build.
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July 22, 2014 3:25:26 AM

That's really, really strange. I'm getting 65-68°C max in AIDA64 testing everything for 8 hours. On a Scythe Mugen 4, which is a 30€ air cooler.
But I have it on 1.13-1.15v under stress at 4.4ghz. In prime95 28.3, though, my voltage spikes to 1.56 (which is why I'm not running it anymore) and my temps went into the 90s. Prime95 26.6 on the other side shows same as AIDA.
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July 22, 2014 4:00:53 AM

DubbleClick said:
That's really, really strange. I'm getting 65-68°C max in AIDA64 testing everything for 8 hours. On a Scythe Mugen 4, which is a 30€ air cooler.
But I have it on 1.13-1.15v under stress at 4.4ghz. In prime95 28.3, though, my voltage spikes to 1.56 (which is why I'm not running it anymore) and my temps went into the 90s. Prime95 26.6 on the other side shows same as AIDA.


look at above few post ... that my setting and hope it can help you figure your out
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July 22, 2014 7:05:56 AM

DubbleClick said:
That's really, really strange. I'm getting 65-68°C max in AIDA64 testing everything for 8 hours. On a Scythe Mugen 4, which is a 30€ air cooler.
But I have it on 1.13-1.15v under stress at 4.4ghz. In prime95 28.3, though, my voltage spikes to 1.56 (which is why I'm not running it anymore) and my temps went into the 90s. Prime95 26.6 on the other side shows same as AIDA.


I can't really figure out how to set a voltage. I tried going for adaptive, and it seemed to work fine at 1.25, only going to 1.26 under stress and no more, however when I turned it down to 1.15v, it stayed at 1.26v. I guess I'm either doing something wrong, or it's blocked. Mobo is Z97 Deluxe and I just can't figure it out. I could put it in manual, but I don't want to keep it at same level.

Another thing. Right when I thought it was all good sitting at 4.4Ghz, I left HWMonitor on while playing BF4. After a few hour session, it showed 83c as the maximum temp. Now I know that it probably only hit that for a few seconds total, but that's still WAY too high for a simple game. I imagine x264 encoding will make it jump to 88c area, which is what I've had with the previous cooler.

I also tried touching the top of the case while playing, and it's VERY hot. Left side of it near my leg is still ice cold, but top is hard to touch because of the heat. I also barely felt any air coming out, and the air that was coming out was obviously very hot. I'm wondering, maybe something wrong with the setup? I'm still using the Noctua NF-P14 (two of them) on top, with radiator mounted below them as shown above on the picture. One of them is also on ultra low noise adapter, pretty much because the wire was too short to reach the connector otherwise, the other is full speed, 750 and 1200 rpm respectively. The stock H110 fans are 1500rpm, but I believe that Noctuas should be doing the same performance-wise anyway? So my options here are to either remount Noctuas for intake (although I believe that'll just trap the hot air around CPU and won't help), or try adding the stock fans below the radiator for a push/pull. I'm not sure if either would help, though, and I'd really hate going back into the case and messing around again.

UPDATE: Who would have thought? I guess it was a bad idea running top fans at different speeds. I removed the low noise adapter on the second fan making it's max rpm 1200 (like the other fan on top), and I see a difference in temperature. On stock frequencies I'm now getting no more than 71c under normal stress testing, and no more than 78c when using AVX instructions. At least that's below 80c, for now anyway. I hope it stays like that. I also tried adding two more fans, the stock H110 ones, but they simply don't fit, motherboard is in the way.
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July 22, 2014 10:02:26 AM

Glad your temps went better now, haha. As for the voltage, I'd never use anything else than the "Override"/"Static" voltage option and setting it manually. Adaptive and offset simply don't work well, especially not on overclocked cpu's. Using the adaptive or auto mode of my mobo, it would feed my cpu 1.37v.... which is at least 0.2v too high.
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July 23, 2014 4:00:24 AM

DubbleClick said:
Glad your temps went better now, haha. As for the voltage, I'd never use anything else than the "Override"/"Static" voltage option and setting it manually. Adaptive and offset simply don't work well, especially not on overclocked cpu's. Using the adaptive or auto mode of my mobo, it would feed my cpu 1.37v.... which is at least 0.2v too high.


Yeah, read a lot about adaptive being off and feeding too much, but mine seems to work fine, never exceeds 1.26, which a bit more than I wanted to, but still fine.
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July 23, 2014 4:23:48 AM

Andrey Rybakov said:
DubbleClick said:
Glad your temps went better now, haha. As for the voltage, I'd never use anything else than the "Override"/"Static" voltage option and setting it manually. Adaptive and offset simply don't work well, especially not on overclocked cpu's. Using the adaptive or auto mode of my mobo, it would feed my cpu 1.37v.... which is at least 0.2v too high.


Yeah, read a lot about adaptive being off and feeding too much, but mine seems to work fine, never exceeds 1.26, which a bit more than I wanted to, but still fine.


Yeah adaptive is perfectly fine in your case then.
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