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Direct CU2 GTX 780 Cooling issue

mjenabi2

mjenabi2

mjenabi2

Associate
Joined
18 Sep 2013
Posts
205
Hey guys

ive had the card since the price drop and while the performance & cooling is fairly good, it is causing my cpu to overheat.

cirmKAn.jpg
if you look at the pictures, air leaks from the circled areas and goes directly to my noctua nh-d14 cooler and heatsink.

mQwqw5B.jpg
my cpu would never ever go above 45-50c but now hits 65-70 on a regular basis

has anyone encountered this issue? is there a possible fix for this?
 
Those types of coolers will dump heat into your case, good air flow will stop it from impacting your CPU (might still make a degree or two but that's fine).
 
Deceptor said:
Those types of coolers will dump heat into your case, good air flow will stop it from impacting your CPU (might still make a degree or two but that's fine).
Click to expand...

there is a 200mm intake fan @ 1krpm and same on top to exhaust and a 120mm on the back for exhaust as well.

what's strange is that i had a gtx 480 with accelero turbo 2 cooler on it and it blew warm air directly into the cpu cooler heat sink but it never had this much effect on it.
 
That's what happens when you don't have a GPU cooler that exhausts air.

Also, if you have 1 fan pushing air in and 2 extracting that is uneven. Some of the air being extracted will be fighting to get back in or finding a way in somewhere else. It's best to have equal intake and outtake fans so you get a good flow of air.
 
no_1_dave said:
That's what happens when you don't have a GPU cooler that exhausts air.

Also, if you have 1 fan pushing air in and 2 extracting that is uneven. Some of the air being extracted will be fighting to get back in or finding a way in somewhere else. It's best to have equal intake and outtake fans so you get a good flow of air.
Click to expand...

I wouldn't agree with this; tests have shown that negative pressure (more exhaust than intake) is more efficient; it takes out all the warm air from the case, while positive pressure might cause it to re-circulate in the case. Of course, negative pressure pulls in more dust to the case too, so people do not like it generally.

But all this depends on what kind of cooling you generally have; if your exhausts are near the CPU cooler, the hot air goes "Through" it, but if you have a side-exhaust, the hot air might not reach the CPU. OP's case is cramped though, so this won't help much I guess.

Might help just opening up one PCI slot below and above the card.
 
mjenabi2 said:
cirmKAn.jpg
if you look at the pictures, air leaks from the circled areas and goes directly to my noctua nh-d14 cooler and heatsink.

mQwqw5B.jpg
Click to expand...
I wouldn't worry about them circled areas

As In that case/fan setup all the heat from your 780 has to go past your CPU cooler to get to your exhaust fans..;)
 
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Make said:
I wouldn't agree with this; tests have shown that negative pressure (more exhaust than intake) is more efficient; it takes out all the warm air from the case, while positive pressure might cause it to re-circulate in the case. Of course, negative pressure pulls in more dust to the case too, so people do not like it generally.

But all this depends on what kind of cooling you generally have; if your exhausts are near the CPU cooler, the hot air goes "Through" it, but if you have a side-exhaust, the hot air might not reach the CPU. OP's case is cramped though, so this won't help much I guess.

Might help just opening up one PCI slot below and above the card.
Click to expand...

i wouldnt really say that the airflow is unequal because the 120mm exhaust fan is within maybe an inch of the cpu cooler which itself has a large exhaust fan pushing the warm air directly towards the exhaust fan. as you can see in the bottom picture.

im a bit puzzled though, my 480 hit 80c on a regular basis and pushed warm air, even more so than the dcu2, towards the cpu heatsink but never caused my cpu to overheat.
 
mjenabi2 said:
is there anyway i can install a sort of divider between the card and the cpu looker to avoid this problem?
Click to expand...
If you put a divider in that stopped the heat from the GPU going upwards towards the cpu cooler how would the heat from the GPU get out the case when both exhaust fans are above the gpu..

The only way would be to mod an exhaust fan into the side panel of your case where the 780 is...;)
 
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99% sure the 600T can take a 200mm fan on the mesh side panel. Grab either a cm megaflow or a spectre pro 200mm :)
 
I hate to recommend this. But maybe sell the D14 and get an H80 or similar? I prefer the D14, but the AIO liquid coolers work well with an open venting gpu.
 
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