SLI Video Card issues

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pjnix

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Apr 27, 2008
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I have two 9600 GT's running in SLI (The Asus TOP brand), on an Asus P5N-D motherboard. Bottom line - the cards are running extremely hot - GPU 1 idles at approximately 55 C, and GPU 2 at approximately 70 C. At system startup these cards are at 43 and 48 C, respectively, but after 5-10 minutes increase to 55 and 70 C. Under load, GPU 1 doesn't jump to more than 60 C, but GPU 2 gets all the way to 90 C. What's the deal here? Is it recommended that I exchange the 2nd GPU? The cards are very close together, but would that honestly make a 30 C difference? Any help/recommendations are much appreciated; thanks in advance!
 
This may sound dumb, but have you tried swapping there location to see if the temperature changes?
 
That's a great suggestion, I will try that. Does anyone else have any ideas?
 
The lower card normally runs a few degrees hotter. Your GPU2 seems too large a temp difference.
A case fan either in front of the cards blowing intake air over them, or mounted on the side as in a side cover case fan would help exhaust the heated air.
Worth swapping the cards around as ToxicBanana suggests. If GPU2 still runs that large a difference, you'd know it's a case airflow problem instead of a poorly applied heatsink.

EVGA Precision allows increasing the fan speeds and monitoring the temps.
 
I actually put a case fan in last night, it's on the side right at the level of the GPU's. It's blowing outward, should I re-direct it to blow on the cards? Thanks!

Edit: I guess I should state that there was cooling already in the case, I just added a couple more fans: one in the front drawing in air (in front of the hard drive cage), and the other on the side as mentioned in the previous paragraph.
 
If the heatsink on the GPU is, in fact, poorly adhered; how would I go about repairing this myself?
 
Have you tried to switch the cards? I mean moving Card #1 to slot 2 and card #2 to slot 1. Maybe the hotter card runs hot by default?
SLI definatly rises the temperature. With triple SLI the idle temperature is almost as hot as a loaded single card.
 
I've been at work all day, I will switch the cards when I get home in an hour or so. I'll update then!
 
Alright, temperatures have gone down by switching them, but my 2nd card still loads at about 78 C, and takes considerably longer to cool down. Any thoughts?
 
It's just the way it sits so low in the case that causes it's temps to run higher than GPU1.
It takes longer to cool for the same reason. It's not getting the volume of air the top card gets.

78C isn't hot for the card with stock cooling on it.
 
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