Crooksy

Hi there, currently running two GTX260's in SLI.

The issue seems to be when i game, both cards heat up (as expected), but when i finish gaming, GPU1 seems o cool down nicely back down to 37c where it then remains constant which is where it normally is when idling.

Then the problem seems to be that GPU0 does not cool down properly. Right now it is at 50c. I last played a game (UT3) around 1 hour ago in which my second GTX has cooled down to idle temperatures.

The only way to get the card back to idle is to shut off the PC and wait till it cools down that way.

I have noticed a weird thing though, all the temperatures on the first card are high, including the memory, GPU and ambient. I don't understand how there can be an 8c difference in temps in cards that are literally inches apart.

I have made sure the sensors aren't faulty. I can feel the heat difference coming out the back of each card.

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Angmaar

Normally one gpu runs hotter than the other because it intakes the hot air off the 2nd gpu.

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Crooksy

i forgot to mention that they both idle at 40(GPU0) and 38(GPU1) for aslong as i wish but as soon as i game, then the first will not go down.

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XFreeRollerX

Try just doing a FAST reboot of your PC

Its likey something resides on the memory RAM that keeps feeding the GPU info and keeping it hot.. if that is the case, driver reinstall will fix it

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Crooksy

Hey again, i have since switched my cards around and discovered the same if not lower temps on my cards.

the top card idles around 40c and the second now idles at 36. But after gaming only goes now to 42. Still a good 6c off what it should be. So looks like there is an issue with the card. Maybe the heatsink isn't secured properly or maybe too much TIM

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SpammisT

So first, the 1st card is not getting enough air flow because you are in SLi. The fan SUCKS air in, and guess what's in the way!?
Another 260.
Not to mention, right below the heatsink (gpu0) is your 2nd 260's gpu chip, where all the heat also transfers to. Know what's on top? Your (gpu0)'s heatsink.

I guess all I can say is it's being kept warm.

Also, I greatly apologize for the terrible picture.
I made it in 1 minute.

Crooksy

obviously didn't read the post properly. Try again.

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mtbmike777

i have a simular issue to yourself, but its not quite as extreme, my sli setup my primary card is always 5-10'c hotter than the second. I think its pretty normal but perhaps the cooling downing slowly is a little suspect as mine will generally be 51/57 idle & 68/73 stressed, i have added another little fan that is approx 70mm that fits very snuggly between the powercables to the gpu's blowing very cool air from a air entry fan that feeds the primary gpu fan, rather than the warmer air thats generated from the other gpu below it.
It now means i get temps of 48/50 & 68/69
mike

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rpm666

I read all of the post and his 1 minute paint sketchup is exactly your problem.

One card breaths fresh cool air.

One card breaths the heat of the other card.

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Crooksy

so how is it when i turn my computer on both cards idle at 40 and 36. Aslong as i don't play a game these temps will remain solid. As soon as i play a game, both cards rise. but only one of the cards will go back down to it's idle temps. Whilst the other card remain about 12c hotter.

I switched the cards round and had roughly the same idle temps. but after playing games the second card (that was originally the first) did not go back down to it's idle temps. it then remained at 42c - 45c, with the idle of 36c. So it looks like the card.

If your theory was true then the top card would be hotter on boot, in game, and go back down to it's idle temps (which are normally 1-2c hotter than the bottom) not stay at 52c after i played a game.

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