Does the intel i7-7700k heat issues still exist? (August 2017)

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Engbuilder

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Hello guys,
I am planning to buy an i7-7700k this month and i have a few question i hope i can answers to.

1. Does the heat issue of i7-7700k still exist?
Note: i wont be overclocking anytime soon.

2. I am planning to buy the cryorig H7 air cooler for the cpu. Is this a good option? Note: i won't be overclocking untill i upgrade to AIO later on.

Thank you guys in advance.
 
Solution
JackNaylorPE
1. I'm not aware of any issue that is new to the 7700k. The internal TIM thing has been around ever since Ivy Bridge. While much has been made about this, it's not really an issue. I'll use GFX cards as a comparison... an nVidia GPU that throttles at 82C performs the same at 81C and it does at 77C as it does at 64C. So if the used a better TIM that dropped the temps from say 72 to 69C, what have we accomplished ? Intel's more efficient post Sandy Bridge CPUs simply don't need the high transfer capability because, using what I assume is a more cost effective thermal design, the CPUs are able to hit performance targets and when overclocking more often than not, you are going to hit a voltage wall before you hit the temp wall.

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geofelt

geofelt

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1. Never has really been one.
2. ok.

More discussion:

I7-7700K runs at 4.2 stock with a higher turbo.
That is near overclocked speeds.
As you increase the overclock multiplier, you must also increase the vcore. It is the vcore that generates heat.
As of 6/9/17
What percent can get an overclock at a somewhat sane 1.4v Vcore.

I7-7700K
4.9 83%
5.0 62%
5.1 29%
5.2 6%

You will normally run out of vcore before you run into thermal limits.
It takes about 100c before the cpu will throttle or shut down to prevent damage.

The key to good cooling is a good case, namely one with at least two 120/140 mm front intake fans.

If your case has a good source of fresh intake air, there is no reason to worry.
I7-7700K is a 91w tdp processor; more with overclocking.
Cryorig H7 will do the job up to a point.
Here are the TDP guidelines from noctua:
http://noctua.at/en/tdp-guide

The cryorig H7 with a 120mm fan is somewhat comparable to the NH-U12s on the chart.

If your case has sufficient front intake and cooler headroom, the NH-U14s or NH-D15s or equivalent will be as good as it gets.
In the mean time, you will have a less expensive, cooler, quieter, and more reliable cooling system than a aio solution.
In the process, if all of your front intake is filtered, your parts will stay cleaner.
 
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Engbuilder

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So does this means i should not buy it? I cant wait for coffee lake to be released. So what should i do?
 
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KirbysHammer

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Don't know why anyone buys a 7700k anymore these days, for 90% of tasks if you can benefit from an i7 over an i5 a Ryzen 7 will crush the 7700k.
 
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geofelt

geofelt

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Coffee lake is coming Aug 21.
It would not hurt to see what that is all about.
Likely, you are going to see 6 and 12 thread processors.

The big draw of ryzen is the large number of threads you can buy at a reasonable price.
If your main use is batch production using multithreaded apps, then ryzen is very good.

If your main usage is gaming, then higher single thread performance becomes more important.
Used to be that few games could effectively use more than 2-3 threads.
But still, over 8 threads does not seem to be that productive for gaming.
Here is a recent test of many games between a 8 thread I7-7700K and a 12 thread I7-7800X.
The results were quite comparable, but in most every case, the higher clock rate of the I7-7700K performed a bit better.
https://www.techspot.com/review/1445-core-i7-7800x-vs-7700k/

 
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JackNaylorPE

JackNaylorPE

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1. I'm not aware of any issue that is new to the 7700k. The internal TIM thing has been around ever since Ivy Bridge. While much has been made about this, it's not really an issue. I'll use GFX cards as a comparison... an nVidia GPU that throttles at 82C performs the same at 81C and it does at 77C as it does at 64C. So if the used a better TIM that dropped the temps from say 72 to 69C, what have we accomplished ? Intel's more efficient post Sandy Bridge CPUs simply don't need the high transfer capability because, using what I assume is a more cost effective thermal design, the CPUs are able to hit performance targets and when overclocking more often than not, you are going to hit a voltage wall before you hit the temp wall.

2. The word "good' is a subjective because it it is comparative. When peeps say for example that the H7 is a good cooler, you should read that as the H7 is a "good cooler for the money" but it's not gpoing to be as good as those costing twice as much. If you are not overclocking, then you don't need anything more than what has been provided for the 7000...the stock cooler. And pretty much any 3rd party cooler you can buy is better than the stock cooler. It should be noted however that the $36 Mugen Max will provide cooling comparable to a $90 Cryorig R1 Ultimate which is in the same class as the Noctua NH-D15 only it costs about the same as the $35 H7.

3. As far as buying an AIO, realize that no AIO outperforms a comparatively priced air coolers. The better air coolers in the $85 range outperform AIOs costing $100 - $165. For example:

Noctua NH-D15 ($85) Air Cooler => 70C @ 33 dbA
Corsair 100i AIO ($100) => 73C @ 68 dbA ... 3C hotter and almost 12 times as loud

If we bring the noise down and set a limit of 40 dBA

Noctua NH-D15 Ai Cooler ($85) => 70C @ 30 dbA
Kraken X61 ($165) => 71C @ 40 dbA ... 1C hotter and still 1.6 times as loud

If you want something that breaks the budget and will give you the cooling you'll want for overclocking, the Mugen max will allow you to cover both present and future needs.

Cooler-Performance-Chart-Stock-Fans-Tim-1.175voltage.png


https://www.newegg.com/Product/Product.aspx?Item=9SIA9ZH3S91415

If ya want water, Id look at the Swiftech AIOS ... they top anything else by 5 - 10C at 40 dbA
http://www.swiftech.com/aio.aspx
 
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Solution
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Engbuilder

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Thank you guys for the help. I really appreciate it.
My final conclusion is that i am getting the i7 7700k paired with noctua NH-U12s due to limit budget for cpu coolers. I would like to hear your opinions.

Btw, i am not really satisfied with AMD products, it always feels like something is missing or software problems, etc.
 
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Engbuilder

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The mugen max is larger than my case specs( Phantex P400 TG). Second, so should I stick with cryorig h7? Because people say its much better than 212 evo.
 
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Engbuilder

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Another thing, i would to get suggestions for intake fans for Phantex p400 tempered glass. It has 3x120mm or 2x140mm.

Please bear with me. This is my first build and i want it to be perfect.
 
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JackNaylorPE

JackNaylorPE

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Thew Phanteks case allows coolers up to 160mm ... the max is 161mm, if you don't want to chance it, the NH-D14 is 160mm. Also the Scythe Fuma is just 140mm tall

There's also the new Scythe Fuma which beats every cooler mentioned so far for $45 including all the $85 air coolers and many $100+ AIOs ... dimensions are 130 mm x 137 mm x 149 mm (w/fan)

temp_oc_aida64.png


FUMA-dimensions.jpg




Phnateks makes the best fans on the market so just add what you already have

Front: 3 x 120mm or 2 x 140mm fan (1 x 120mm fan included)
Top: 2 x 120mm/140mm fan
Rear: 1 x 120mm fan (included)

Adding two more to the front will give ya 3 in and 1 out....rule of thumb is one 120mm for each 50 - 75 watts w/ 1200 rpm fans. ... so up to 300 watts (7700k + GTX 1060) would be covered

I am guessing that this is what comes in the P400,

https://www.newegg.com/Product/Product.aspx?Item=N82E16835709032




 
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Engbuilder

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What about the thermaltake riing 2x140mm? The combo will be i7-7700k and gtx 1080 FTW2.
 
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