First time overclocking 4770k to 4.2Ghz. Need opinion on my temperatures at full load?

Bigblue365 · Dec 15, 2014

System config:
Processor: Intel 4770k - overclocked to 4.2Ghz(Vcore volt: 1.201 V)
MotherBoard: Asrock extreme4 z87
Cooler: Corsair H100i
Ram: Kingston 16gb 1866mhz
Case: Enthoo pro

This is my first build and would like to get an opinion on the CPU temperatures. I ran prime95 v28.5 and the temperatures reached 100 and had to turn it off. On searching through other threads found that latest version does this so I ran prime95 v26.6. Also ran Intel burn test and here are my results.

Prime95 v26.6 test results:
85 C - core 0
81 C - core 1
76 C - core 2
70 C - core 3

Intel burn test results:
97 C - core 0
95 C - core 1
91 C - core 2
82 C - core 3

Are these temperatures too high? Should I reapply the thermal paste?

Darkbreeze · Dec 15, 2014

Do you have all the case fan locations populated and the fan speeds configured as normal or standard in the BIOS?

Darkbreeze · Dec 15, 2014

Where and how do you have the radiator installed and is it configured as exhaust or intake?

Lmah · Dec 15, 2014

The temperature variance between your cores is a lot, you either need to reapply your thermal paste, if that doesn't solve it you probably would have to delid it to fix the variance issue, but I don't recommend it. Performance gains between 4ghz and 4.5ghz are minimal in most cases.

Eximo · Dec 15, 2014

Quite warm for an h100i. Are you certain the cooler is properly installed? A common problem with the h100i and h80i is that they don't quite apply enough pressure on thinner motherboards.

If you can reduce the temperatures significantly by pressing on the top of the cooler during operation then you need to remove the backplate, add some non-conductive washers between the backplate and motherboard, and give it another go.

Here is an example:
http://imagizer.imageshack.us/a/img27/4151/cm6m.jpg

Bigblue365 · Dec 15, 2014

Darkbreeze :

I have a front 200mm fan and 140mm exhaust(these came with the case). Corsair link software is controlling the fans and all set to default mode. Corsair h100i is installed at the top of the case with fans pulling in cool air.

Bigblue365 · Dec 15, 2014

Eximo :

I tried pressing on the cooler but I still see same temps.

Darkbreeze · Dec 15, 2014

You need to press on the heatsink that sits on top of the CPU. Press with medium pressure and hold it there for about thirty seconds with your temperature monitor open. Watch the temperatures. If the temperature drops during that time by more than 1°C you probably need to get it a little tighter as recommended above.

I've seen a couple of instances where guys got about 5-12°C better temps by moving the radiator to the front as intake and using exhaust fans up top where you have the radiator now, and also installing an additional 120mm intake in the bottom of the case at the forward fan location in front of the PSU housing.

dominirican3351 · Dec 15, 2014

Are you sure that turbo boost is off because those temps are very high for intel burn test. Also are you sure the voltages are 1.21 and not ramping up on voltages because 90 is way too high with an h100i

Bigblue365 · Dec 15, 2014

Darkbreeze :

Yes, I pressed on the heat sink on top of the cpu and re-ran the intel burn test. I still see the same temps.

Bigblue365 · Dec 15, 2014

dominirican3351 :

I am using CPU-Z and the A-tunning(Came with the motherboard) and both say the core voltage as 1.201.

dominirican3351 · Dec 15, 2014

What is your pump speed on the h100i, did you oc with a-tuning because if you did turbo boost might still be on and might be causing higher clock speeds and higher temps

Bigblue365 · Dec 15, 2014

dominirican3351 :

I turned off the Turbo boast in the bios and restarted and the machine. The core speed is at 3.5GHz and is not overclocking to 4,2 even though I selected under bios.

Pump speed under corsair link is 2214.

dominirican3351 · Dec 15, 2014

Try using cpuid to check cpu speed to see actual speed of processor

Bigblue365 · Dec 15, 2014

dominirican3351 :

Yes, I am using CPU-Z to monitor the core frequency and Core Temp for the temperature. Changed the Bios settings to default settings and selected the overclocking to 4.2 using the auto config option. Still see the core speed at 3.5 Ghz. Not sure what I missed.

Darkbreeze · Dec 15, 2014

Open your BIOS pages and take some screenshots by inserting a usb thumb drive in one of you usb ports and then pressing F12 when you have the correct bios screens up. It should take a screenshot and store it on the usb drive. You can post the screenshots here.

Bigblue365 · Dec 16, 2014

Darkbreeze :

I was not able to take screenshots of the bios but after uninstalling the A-tuning utility the cpu is overclocked again and here are temps I monitored with Prime95(about 2hrs) and Aida64(about 50 mins).

Darkbreeze · Dec 16, 2014

There is a wild variance between core temps. I'd repaste. Make sure to clean all the old paste off very carefully using isopropyl alcohol and a lint free cloth or coffee filter. You might not be getting something right on the paste job. Those cores should not be more than a degree or two apart. Either there is a problem with the paste job being uneven, the cpu has an issue, a sensor is not functioning correctly or the heatsink for the cooler is not evenly secured all the way around.

Bigblue365 · Dec 16, 2014

Darkbreeze :

Thanks for the suggestions. Here are the Bios settings I am using to overclock.

CPU Ratio = per core
per core limit = 44
CPU cache ration = 44
CPU input voltage = offset mode
offset voltage = +0.010V
CPU override voltage mode = Override mode
vcore override voltage = 1.2
vcore voltage additional offset = auto
CPU Cache voltage mode = Override mode
CPU cache override voltage = 1.2
CPU cache voltage offset = Auto
Rest all of the other settings I left them at the default values.

I disabled the overclock for now. I will add washers to secure the backplate and will reapply the thermal paste. If all is working good what kind of temperatures should I expect with Prime95 and Aida64?

Will this washers work to secure the backplate?

http://www.amazon.com/gp/product/B00HZYA9BY/ref=ox_sc_act_title_1?ie=UTF8&psc=1&smid=A1K1GZBET9SYK6

CompuTronix · Dec 16, 2014

Guys,

19 posts and still no mention of ambient temperature? This is a critical piece of information that should never be overlooked.

All computer temperatures are based on ambient temperature, so we shouldn't speculate about processors temperatures until we know ambient.

If it isn't stated along with full system specs in the 1st post, then we certainly need to be asking by the 2nd post.

We see threads that go on about processor temperatures, only to discover after 30 posts of guess-work and much wasted effort, that ambient turns out to be 15C ... or was it 35C?

People click in here to Tom's from all over the world; Northern and Southern hemispheres, winter or summer, with or without A/C. Since Standard Ambient is 22C or 72F, and Intel's Thermal Specifications are referenced to this value, ambient can make a huge difference in determining how we approach troubleshooting cooling problems, and what we might recommend for cooling solutions.

The bottom line is that we always need to know ambient in the top line!

CT :sol:

Bigblue365 · Dec 16, 2014

CompuTronix :

Ambient temperature is 23 C

CompuTronix · Dec 16, 2014

Bigblue365,

Thanks for the info. It's good to know that your ambient is close to Standard and it's not a contributing factor.

Any hardware store should have suitable "O" rings. As darkbreeze suggested, depending on how much effect they have on improving water block contact, you may expect anywhere from a degree or two, to more than 5 or so. You may also find that the variance between core temperatures improves. You'll just have to try it and see what you get.

CT :sol:

Bigblue365 · Dec 17, 2014

Darkbreeze :

CompuTronix :

Hi darkbreeze,

I removed and reinstalled the h100i also added the washers to backplate for a better fit.

Aida64 stability test at 4.4Ghz overclock ran stable for 1.5 hrs and here are the temps

Prime95 blend test at 4.4Ghz overclock ran stable for 50Mins and here are the temps

Are the temps in a safe range? There is still variance between the core temp not as much as before.
At stock when I ran prime95 the variance between cores is 1-2 degrees. But on overclock there is about 6-8 C variance between cores.

kittylovermybut · Dec 17, 2014

Bigblue365 :

I know I'm a little late but I just want to inform you that the heat spreader and paste underneath it have some serious quality control issues. They honestly don't spread heat correctly, Linus tech tips touched base with this issue quite a few times and Intel admitted to having this issue. The devils canyon version fixed it for 4th generation chips and all new processors no longer have this heat disperssion issue. I just wanted to inform you of this since ive heard alot about that particular shortcoming. If you wanted to fix it, you could look into faceing, which is somewhat dangerous but worth it.

Darkbreeze · Dec 17, 2014

Bigblue365 :

Don't run blend, run small FFT's. Everything looks better overall but there is still a fairly large variance on one core when you ran the blend in Prime, run Prime again on Small FFT's for 10 min., then take a screenshot. Run HWinfo the entire time so your result will show any max temp spikes that might have occurred during the Prime run.

First time overclocking 4770k to 4.2Ghz. Need opinion on my temperatures at full load?

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