NZXT H440 4790k 4.8ghz 1.24v safe temps and cooling setup suggestions?

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maney266

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Apr 9, 2009
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Hi guys just got finished building my pc yesterday :
Specs:

Sabertooth z97 mark 2
4790k @ 4.8ghz 1.24v with Cache ratio on 45. Cache voltage is 1.25v
H110 push pull intake
R9 290
NZXT H440

Ive got the H110 mounted at the front of the case intaking air with the stock fans then the radiator is placed and another set of sp140's pulling the air from the radiator into the case.
So Fans---->radiator--->fans---->mobo
Ive got an AF140 on the back as exhaust along side 2 more AF140's on the top as exhausts.

My idle temps with an ambient temp of around ,17c is 23 and my temps under Prime95 after around 5 mins are 83-85c. At stock the temps stay in the low 60's. Are these temps okay for this? Im using the stock Thermal paste corsair provide so i could chance that out for maybe a few degrees difference.
Does anyone own this case and know of any better cooling options. I could mount 3x 120mm at the top as exhausts instead of 2x140mm's
Any help would be appreciated thanks
 
Solution
hjj174
For the best airflow in the H440, I recommend static pressure fans that also have good airflow. Noctuas are awesome fans that give awesome performance while also maintaining near silence, even at max speeds. I have two on my NH-D14 that max out around 1300 RPM but push an incredible amount of air.

Also a tip with the front and top panel of the chassis is to remove the grilles on the vents. Also, at least at the top of the case, blocking openings around the fans with something like electrical tape will prevent hot air from being forced back down. Another tip for increasing air flow is remove the sound dampening foam on the inside of the front and top panels. Putting Noctua fans there would actually lessen the noise impact of removing...
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Use OCCT for stress testing on Intel processors. http://www.ocbase.com/index.php/download
 
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The fact that you are able to achieve that overclock with that voltage is amazing. Also, those temps aren't the best but are to be expected with such a high overclock. As long as you aren't going over 90C in stress testing, you should be fine.
 
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I see you have the same case as me. You have any tips for good airflow cooling? Do you think it would be beneficial if i had 3 120mm fans as exhausts at the top rather than 2 140's? Also i was thinking about replacing the h110 stock fans with noctua static pressure fans. Any thoughts?
 
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For the best airflow in the H440, I recommend static pressure fans that also have good airflow. Noctuas are awesome fans that give awesome performance while also maintaining near silence, even at max speeds. I have two on my NH-D14 that max out around 1300 RPM but push an incredible amount of air.

Also a tip with the front and top panel of the chassis is to remove the grilles on the vents. Also, at least at the top of the case, blocking openings around the fans with something like electrical tape will prevent hot air from being forced back down. Another tip for increasing air flow is remove the sound dampening foam on the inside of the front and top panels. Putting Noctua fans there would actually lessen the noise impact of removing said foam.

Depending on the fan's specs, 3x120mm fans will almost always push more air than 2x140mm.
 
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Solution
Definitely lower the cache voltage. 1.25v is the absolutely maximum recommended, even for testing. Amazing voltage for 4.8ghz, by the way. I already need 1.31-1.32v for fully stable operation.
Temperatures are a bit on the high side, but since you usually won't be stress testing your pc all day long they are okay.
 
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Would lowering my cache ratio affect fps in any way? thats the lowest i can get my voltage for that cache ratio
 
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Overclocking your cache doesn't really add to your performance in games, in fact it is only really useful in applications that use very high memory bandwidth and large amount of memory such as video editing. You are only increasing power draw and temperatures if you are using this to game.
 
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It at best reduces stability. However, keeping it within 400mhz with the clock ratio is recommended, but not necessary. As mentioned, it depends on what you do. For very cache intensive applications, having a higher uncore ratio will help, in games however, no real difference. Just get the cache ratio back to 4.4ghz and you're still within 0.4 to the clock ratio.
 
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Update: Turns out my build wasnt completely stable on prime95 at that clock with that voltage. It failed the blend test after around 30 secs so i put my Vcore on 1.2 and ran my cpu at 4.7ghz and its fine now. As for the cache ratio. Ive got it set at 44 and at 1.15v. My temps on the blend test start around 60 but skyrocket to 70-80 after 10 mins or so, is this normal? For a h110 i thought i would have gotten better temps than this even with an NZXT H440. Before this build i had an i7 920 with a noctua NHD14 at 4.4ghz, 1.475v! and it ran cooler than this lol
 
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**cpu#1-4 temps are good to its ft threshold. Thats the best way to keep use of a high efficiency cooler. Cant get 920 stable out at +4.50Ghz > on anything less than 1.485v. If you know just how to make the 920 run at 4.4ghz then 4.7> for a 4790k should be like a walk in the park... millions of years ago
 
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