Originally Posted by Psyborg
So far I'm loving the performance on these cards. And for the most part they've run everything I've thrown at them flawlessly. My only concern is the top card runs WAY hotter than the bottom in SLI due to the close proximity of the cards to each other. I've updated my case fans which helped some -3 or -4 C on both cards, but the top card is still a good 21 C hotter than the bottom. This is regardless of which card is on the top. Anyone have ideas on how to reduce this a bit? Best I can do is ramp up the fan speeds in afterburner and that helps some, but pretty much get REALLY loud as things get warm.
If you've handled the case fan thing as best you can, and can't tolerate the additional fan noise from ramping up the gpu fans, the remaining options aside from water are:
1) Replace TIM (you could lap the heatsink as well if you're ambitious)
2) Buy a board that gives you more space between cards (or a new case with more expansion slots if that will allow the same thing on your existing board).
I have lapped and replaced TIM on my top GPU and have two full spaces between cards, and on full load my top card runs about 13C higher temp. Prior to the lapping and TIM replacement it was about 15C higher.
If you do replace the TIM, I highly recommend a generous coating of TIM over the entire chip as opposed to the 'drop in the middle' application style. These chips and heatsinks are not very flat is the truth.