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SLI cooling tips?

post #1 of 3
Thread Starter 
Hello my overclocking bretheren

I'm thinking of picking up a 775 sli mobo + another gtx 460 1gb to run in sli. I'm really impressed with the performance I've seen in benchmarks online.

That said, from the looks of most sli configs you're going to have the cards really close together, does this cause overheating issues for the bottom card?

Would I need to beef up my case cooling or something?
Superhans
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Superhans
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post #2 of 3
I think you will find it's the top card that suffers more due to heat rising and I think it is used as the slave card also? At least it was that way when I had two 470's together. I had a side case fan blowing on them both and the top was matbe 5 degrees hotter, but still within a safe range under load. (below 80c)

Oh and I got a 120mm high cfm fan and reduced the voltage on the cards in MSI afterburner slightly, therefore reducing heat a bit.
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My System
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i7 990x @ 4.3ghz HT on Gigabyte X58-OC HD 7970 X 2 24gb @ 2000mhz 
Hard DriveOptical DriveOSMonitor
500gb ssd/hhd hybrid and 500gb hdd and 1tb ext hdd LG Blu Ray& Asus DVD R/W Windows 7 Hanns-G 28" 
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It has one 875w Thermaltake Toughpower XT NZXT Phantom in red. It has one 
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My Sofa Arm 
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post #3 of 3
The top card tends to be hotter, though sometimes it shows up as GPU2 for whatever reason. It happens because the fan intakes air from below the card, ie the hot air around the lower card. I found putting a fan in the 5.25" drive bay helped, as well as removing the grates over the unused expansion slots. Side fans are the typical suggestion, though.
Jane
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Jane
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