fan cooling and crossfire

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19 Aug 2011
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I'm currently using a xigmatek utgard case (the one with the plain side w/ two slots for fans, with stock fans) with a 6970 OCd to 950 on the core clock and 1450 on the mem clock, in the future I'm thinking of going crossfire.

At the moment the GPU is running at about 60C, I'm assuming when I add another it'll bump up the temp (especially of the top one) quite a lot so I'm wondering about cooling solutions.

As far as I can tell there's 3 potential things that could help.

Filling up all the available spaces on my case with fans. I currently only have the stock ones so I can still fit two 120mm fans in the side (I assume the one over the GPU would be intake and the one over the CPU exhaust?), one in the bottom and switch out the 170mm on top for two 120mm ones. This is something I'll possibly do anyway to reduce noise. It's not especially loud, but quieter is always better. :)

Watercooling, which is something I don't want to do at the moment due to expense.

Get a 6970 with a good cooler on it and put it in the top position, though I think it'd still get very hot if the case stays as it is.

Obviously the choices aren't all mutually exclusive, I could get a 6970 with a better cooler and put in more fans, but I'll be on a budget when I come to crossfire anyway so the cheaper, the better (though I'll happily spend extra to lower the risk).
 
I have 2 cards in sli air cooled and what I have done is used the next pci express lane down so there's a 50mm gap between cards, then I have a fan blowing through the middle and have taken one of the shields of at the back so the warm air can escape...works like a charm...you may need to get a longer crossfire bridge though
 
I have a pair of 6950's in my case, with a single 120mm intake fan fitted to the side pannel that sits nicely against the GPU's. If its any help/indication my temps under heavy stress sit around 80c top card 72c bottom card.
 
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