Exhaust fan vs gpu cooler

voodoochild2008

voodoochild2008

voodoochild2008

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12 Oct 2013
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Hi
I7 4770k OC to 4.2
GTX 780 stock speed.
I have a great cpu cooler and a good few fans pulling in and pushing out, the problem I seem to have is the heat off the gpu when in heavy use is shooting the inside case temp up, I ran a program called heavyload and at 100% load the cores hit 65c to 72c/prime95 stress 67c to 79c (is this good or bad)
Now I tried Crysis 3 with all maxed settings and checked realtemp and coretemp and after 20mins the core temps are around 68c 78c....so after a bit of working out the gpu on some games is adding to my core temps due to more heat in the case, the simple ways to help is either a pci exhaust fan to remove some of the warm air just under the gpu or add a pci gpu cooler to blow air upwards. Has anyone tried either of these things and if so can you point some good ones out. Thanks
 
Don't add an exhaust under the GPU, it will "Starve" the GPU off air.

Add a side intake if you can. Or more front intakes. Or top exhausts.
 
Hi
I have the full Phantom case which has 1 rear and two top exhaust fans...there is space for a side one which would help but I have a huge cpu fan meaning a side fan will not fit.
You say a pci exhaust will not help if its under the gpu, how about one of the pci coolers that sits under the gpu? I know the temps are maybe ok/just ok but come the summer the temps will rise again and I thinking ahead really.
 
voodoochild2008 said:
Hi
I have the full Phantom case which has 1 rear and two top exhaust fans...there is space for a side one which would help but I have a huge cpu fan meaning a side fan will not fit.
You say a pci exhaust will not help if its under the gpu, how about one of the pci coolers that sits under the gpu? I know the temps are maybe ok/just ok but come the summer the temps will rise again and I thinking ahead really.
Click to expand...

If you can find a pci fan that blows in, thats gonna work. I've never seen one.
 
Ideally, you'd want to run a side exhaust for that, but if you can't fit one due to the cpu cooler...

Seeing as temps aren't really an issue until the weather gets warm, I'd just save up for watercooling next summer :)
 
Seen a few pci coolers that fit below the gpu and blow air up towards the card, not pulling air in from outside the case, just pushing what air is in the case up towards the gpu, issue been if the air it throws at the gpu would be a problem is the fans on the gpu are trying to push the same air away (clash)
 
As a side note, the only game that works the gpu to through out so much warm air is Crysis 3 maxed out, the other stuff is fine, core temps 55c/65c max. (next year games will push gpu more)
The cpu cooler is Noctua NH-D14....this is why no room for side fan.
 
If you really want to do it, grab one of these and run a couple of 120's as exhaust. all you have to do is cut a suitable hole in your side panel :p

ed: examples from previous builds:



 
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Hi
Great pic, the side fans would be cool but....well I suck at DIY, the one thing I did spot is the fan near the HDs, I have the same free space where I can add another fan, thing is this is just moving air rather than adding cooler or removing warmer.
I will have a test tomorrow but the side fans are a must for me, so its smaller cpu cooler to fit a side fan or water cooler.
 
That bay fan was just forwarding cool air from the fan at the front of the case and aiming it at the large VRM heatsink on a custom cooled 7970.

It could help a little with your card, but considering that there was a larger gap between card and heatsink with mine, I'm not sure it'd make much difference.

A more practical solution that doesn't involve carving up a case, is to just get an all in one watercooler like an H100 and just use the side fan on the case like you say, although it's position is a touch high.
Still, you could have the front case fans and the H100 fans on intake and have the rear + side case fans remove cpu and gpu heat.
 
I have a Phantom case and was able to mod the case and a 200mm nzxt fan in order to just about fit with a hyper 212. It wasn't perfect but okay. I've also seen a mod where someone was able to fit a 200mm bitfenix fan to a Phantom side panel using some silicon fan pins even though they were using a pretty tall noctua cooler so it is possible and wasn't hugely DIY intensive.

Alternatively you could pick up a h100i and fit it to the top of your phantom which is what I ended up doing. It allows you to fit just about any 200mm fan on the side as either exhaust or intake. I've found intake is better for general case temps.
 
If you want to remove heat from a case venting gpu, side exhaust is the way to go :)
Side intake generally works better for rear venting gpu's.

In my case, using those side fans as intake actually raised gpu temps.
 
Well I am now thinking I might try a slight mod, the side metal mesh seems as though it will remove, plan been to move the mesh outwards so I can fit a large side fan, the mesh would not fit back into place so I would need to add something on the outside to neaten it up.....next step been to find the thinnest 200mm fan in the world :-)
 
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