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Antec 900 8800gtx SLi Concerns

post #1 of 9
Thread Starter 
With the release of AoC im seriously considering upgrading to 2 8800gtx in SLI but with the power supply design being in the bottom it seems like one of the cards willl be very close to the power supply. Im wondering if any of you know how close the card can be to the power supply and if that might cause problems.
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post #2 of 9
cut a hole in the bottom of your case, turn the PSU with the fan drawing air in from below and make sure your case is sitting up an inch or so on feet (and not on the carpet btw) and try that. That way it won't be drawing in hot air from your cards into the PSU and will get cool air from underneath.
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post #3 of 9
Thread Starter 
Would it be better if i just baught a new case? I dont wanna mess around to much with this case because i move my pc pretty often. If you think i should buy a better case could you recommend one that has similar are flow an fans as the 900?
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post #4 of 9
well I use the CM690 which has the PSU on the bottom and already has the vent to draw air in from the bottom and is why I suggested it, it works great for me. .

It would really be pretty easy mod to do if you felt up to it. Just take out the PSU, trace a circle slightly smaller than a 120mm fan, cut it out, and put it back in facing down. Just making sure you have an inch or so of clearance raised up by case feet and have it sitting on something other than the carpet.
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post #5 of 9
try the twelve hundred model , psu is still on the bottom but the MB should be further away from it....thus...PCI-E card further away


http://www.newegg.com/Product/Produc...82E16811129043
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post #6 of 9
Just throw in the card, and leave psu as is, it will pull more hot air away from card (inverted psu). My friend has 2 gtxs and it worked for him.
post #7 of 9
I tried two 8800gtx in an antec 900 as well. The problem is that the power supply fan and lower video card fans create a dead zone in between them. Typically in an sli setup the top card is always hotter but in this config, the lower card was as much as 15c hotter than the top card.

If you are concerned about layout, look at a case like the thermaltake armor which has its power supply up top. The model with the 25cm door fan (which i have owned) is really handy for sli cooling as well.
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post #8 of 9
Thread Starter 
Thanks Robilar, so now I have to ask if that will become a problem in the long run. I would like to get away with not buying a new case if at all possible. My 8800gtx runs at about an average of 40c right now so how much of an increase in temp do you think i would see if i installed a second and would the temp increase be significant enough for me to buy that thermaltake armor case?
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post #9 of 9
if your not restricting air flow there shouldnt be a problem with heatits one of the best air flow cases out,im modding a a-900 with a gtx and a corsair 750 psu,invert psuor rent a 41/2 inch hole saw,or use a compass and make a 43/4 inch cut with sharp tin snips,i used a hole saw but the fan was 140mm so i just made the hole the size of fan blade dia.

Edited by phillipjos - 5/29/08 at 12:20am
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