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6970 Crossfire Cooling

post #1 of 26
Thread Starter 
I have http://www.tigerdirect.com/applicati...949&CatId=3669

in crossfire in my sig rig. I have been pondering how to better cool these beasts. GPU 1 runs the warmest , due to its on top and receives heat from GPU 2 ... In a gaming session I have MSI AB set to run the fans and with keeping my hearing... I keep the warmest card below 80c. However I cant help but think there has to be a better way. WITHOUT water please though. I am not ready to take the plunge into water cooling yet. I just feel there has to be better air cooling options out there that I am unaware of.
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post #2 of 26
What temps do yyou get on the Top card ?

I'd say you're fine if it doesn't go above 85°C.
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post #3 of 26
I feel ya man. Honestly, there is nothing better than the stock cooling for crossfire setup. That was the main reason I went water. At best, stick a side fan to your case - that should pump enough air for the coolers to do their job. Those coolers need positive pressure inside the case - more pumped in than sucked out.
To be honest, with a custom fan profile or at 50 - 60% fan speed, the cards will stay at a very decent temperature. Should not break 70c. But make sure to have the side fan so the coolers get cold air to suck in.
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post #4 of 26
Thread Starter 
Well to keep it below or at 80c during gaming, I have to have the fan at 65% and higher... keep in mind this is a 10k rpm fan. I know reference design is usually poor for cooling, just didnt know if there were better air cooling options or not. I have found if I can get the warm (hot) air out away from the tower once the cards push it out, that my temps stay better instead of recycling hot air. During gaming my room will climb from 72f to around 78-80f after 3-4 hours of gaming. We turned the ac on the other night, due to it got a bit warmer in the room
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post #5 of 26
Thread Starter 
Quote:
Originally Posted by Awaz View Post
I feel ya man. Honestly, there is nothing better than the stock cooling for crossfire setup. That was the main reason I went water. At best, stick a side fan to your case - that should pump enough air for the coolers to do their job. Those coolers need positive pressure inside the case - more pumped in than sucked out.
To be honest, with a custom fan profile or at 50 - 60% fan speed, the cards will stay at a very decent temperature. Should not break 70c. But make sure to have the side fan so the coolers get cold air to suck in.
If you click the ATi info thread link in my signature, you will see my set up. I have 4 fans in the side pushing air into them. I have them on a controller and through trial and error have found running then at about 50% is what the cards like. Any faster and it seems to be a negative effect and causes temps to rise even further.

I just wish I could hear better over the sound of these jet engines lol
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post #6 of 26
New mobo out of the question?

Card spacing, you'd see a ~10°c drop if you could space your cards.
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post #7 of 26
Thread Starter 
Quote:
Originally Posted by grunion View Post
New mobo out of the question?

Card spacing, you'd see a ~10°c drop if you could space your cards.

If I was to think about a new MB... what would you suggest ? and not lose features I have with the UD3R ?
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post #8 of 26
From my experience, pushing fresh air on a crossfire set up isn't going to do much simply because the intake of the top card is too small.

There is no other option than:
- watercooling
- switching MB for an PCI slot in between the two PCI-E

I wish the graphic card were reversible (one PCI-E connector on each side) So you can turn them upside down and have each fan a clear intake
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post #9 of 26
Thread Starter 
Quote:
Originally Posted by Kerian View Post
What temps do yyou get on the Top card ?

I'd say you're fine if it doesn't go above 85°C.
well only way I can keep it at 80 and below is to use MSI AB fan profile and the fans will reach 60-65% during gaming. Yes I can keep them cool, but just a bit hard to hear anything else over the sound of the fans
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post #10 of 26
Thread Starter 
Quote:
Originally Posted by Kerian View Post
From my experience, pushing fresh air on a crossfire set up isn't going to do much simply because the intake of the top card is too small.

There is no other option than:
- watercooling
- switching MB for an PCI slot in between the two PCI-E

I wish the graphic card were reversible (one PCI-E connector on each side) So you can turn them upside down and have each fan a clear intake
That would be awesome if they did have that option. Yes I agree the spacing is the issue, and it gets warm air from the other GPU to start with so its cooling is less efficient than the 2nd cards cooling.

I could space them, but then I would loose my 16x slots... and go down to a 8x slot to do it. I dont feel thats a good option.
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