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Multi gpu placement

beefalo
By beefalo
in Graphics Cards
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So I have two 7970s and was wanting to see what you guys thought would be the best way to put them in my case. One is a dual fan card and the other is a reference card with the blower fan. There will be a one slot gap between them so which should be the top card in my system and should I have the PSU blow on the bottom card or not?

i7 4770k, 16GB Corsair Vengeance

Gigabyte z87, Phanteks Enthoo Primo

7970

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put the blower at the bottom, and let the PSU feed it with air. The open air cooler is able to get more air even though the blower one sucks in lots from bottom/front.

 

When doing vice versa, the open one would get as much air, the the blower one wouldn't get that much

CPU: Intel i7 4790K @4.8GhZ  CPU Cooler: Be Quiet! Dark Rock Pro 2  Motherboard: Gigabyte Z97 UD3H  GPU: Asus ROG RX 480 8G OC Memory: 32GB Gskill Ares 2400Mhz  Storage: 2x Crucial M4 512GB SSD (raid0)  / 1TB Seagate FireCuda SSHD Case: Phanteks Enthoo Evolv ATX PSU: EVGA SuperNOVA P2 750W  Operating System: Windows 10 Enterprise LTSB (64 bit) Other: NZXT Hue+ LED Controller with 8 LED Strips for desk and PC lighting

 

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put the blower at the bottom, and let the PSU feed it with air. The open air cooler is able to get more air even though the blower one sucks in lots from bottom/front.

 

When doing vice versa, the open one would get as much air, the the blower one wouldn't get that much

the psu blows air out the back, the fan is an intake

Cpu: Intel i7 4770k @4.4 Ghz | Case: Corsair 350D | Motherbord: Z87 Gryphon | Ram: dominator platinum 4X4 1866 | Video Card: SLI GTX 980 Ti | Power Supply: Seasonic 1000 platinum | Monitor: ACER XB270HU | Keyboard: RK-9100 | Mouse: R.A.T. 7 | Headset : HD 8 DJ | Watercooled

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I think you should put the dual fan card at the bottom because it is better at sucking in air than the Blower design and it will be better at fighting for air from the PSU than the reference card. By the way a PSU always exhausts out the back of a case.

XYPHER AMD FX8350 @ 4.6Ghz ASUS SABERTOOTH 990FX R2.0 AMD RADEON HD 7970 @ 1140Mhz 16GB Corsair VENGEANCE 1600Mhz OCZ VERTEX 3 240GB SSD Corsair H100i 1TB SEAGATE BARRACUDA FRACTAL DESIGN DEFINE R4 CORSAIR K90 MADCATZ RAT 3 iiyama ProLite B2480HS 24"

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I think you should put the dual fan card at the bottom because it is better at sucking in air than the Blower design and it will be better at fighting for air from the PSU than the reference card. By the way a PSU always exhausts out the back of a case.

Don't. Invert the PSU, and put the blower one at the bottom. It will get fresh air, the card on top will run atleast 6+degrees compared to the bottom one, if both have great cooling. But, the blower one is known to run hotter, so do it like above. If you don't believe me, test it with both positions and see,

Codename: HighFlyer, specs:  CPU: i5 2500k cooled by a H70ish(2 rad)   Mobo: MSI MPower Z77   GPUs: Gigabyte GTX 660 OC 1150 MHZ core, 3150 memory both   RAM: Corsair Vengeance 16G @1600mhz   SSD: ADATA Premier Pro sx900 / HDD Seagate Barracuda 1TB/Samsung 1TB   Power supply: Corsair RM650 80+ Gold   Case Corsair Carbide 500R   5.4 ghz achieved on the good old 2500k, may it rest in peace. Current daily OC is 4.8 @1.41 v

 

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Don't. Invert the PSU, and put the blower one at the bottom. It will get fresh air, the card on top will run atleast 6+degrees compared to the bottom one, if both have great cooling. But, the blower one is known to run hotter, so do it like above. If you don't believe me, test it with both positions and see,

What if he does not want to invert the psu. Also it is definitely the best idea to put the GPu with the reference cooler on top so it is not fighting the PSU if he does not want to invert it.

XYPHER AMD FX8350 @ 4.6Ghz ASUS SABERTOOTH 990FX R2.0 AMD RADEON HD 7970 @ 1140Mhz 16GB Corsair VENGEANCE 1600Mhz OCZ VERTEX 3 240GB SSD Corsair H100i 1TB SEAGATE BARRACUDA FRACTAL DESIGN DEFINE R4 CORSAIR K90 MADCATZ RAT 3 iiyama ProLite B2480HS 24"

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Usually, PSUs spin slow, and they are pretty far away, compared to a Crossfire sandwich, where you know a reference card is the one running hotter. If we don't agree, OP can do some quick tests, to end this theory.

Codename: HighFlyer, specs:  CPU: i5 2500k cooled by a H70ish(2 rad)   Mobo: MSI MPower Z77   GPUs: Gigabyte GTX 660 OC 1150 MHZ core, 3150 memory both   RAM: Corsair Vengeance 16G @1600mhz   SSD: ADATA Premier Pro sx900 / HDD Seagate Barracuda 1TB/Samsung 1TB   Power supply: Corsair RM650 80+ Gold   Case Corsair Carbide 500R   5.4 ghz achieved on the good old 2500k, may it rest in peace. Current daily OC is 4.8 @1.41 v

 

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I'll test it out later and see what happens.  Will probably end up inverting the psu and putting the reference card on the bottom and seeing if there is somewhere I can mount a fan that will feed it air.  Thanks for the replies.

i7 4770k, 16GB Corsair Vengeance

Gigabyte z87, Phanteks Enthoo Primo

7970

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the psu blows air out the back, the fan is an intake

 hence he said, that his one pushed air out, i whought he may done some fan mod to it..

CPU: Intel i7 4790K @4.8GhZ  CPU Cooler: Be Quiet! Dark Rock Pro 2  Motherboard: Gigabyte Z97 UD3H  GPU: Asus ROG RX 480 8G OC Memory: 32GB Gskill Ares 2400Mhz  Storage: 2x Crucial M4 512GB SSD (raid0)  / 1TB Seagate FireCuda SSHD Case: Phanteks Enthoo Evolv ATX PSU: EVGA SuperNOVA P2 750W  Operating System: Windows 10 Enterprise LTSB (64 bit) Other: NZXT Hue+ LED Controller with 8 LED Strips for desk and PC lighting

 

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