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Sapphire Toxic 5850 Heat Issue

Last response: in Graphics & Displays
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Hi folks,

I just put together the system below, and I am finding that the temps on my two 5850's are running around 70 C at idle and get hot enough to shut down the system under load unless I turn up the fans on both cards to 100%. Even then, the temps hover around 91-93 C when I'm running Half Life 2 with the settings cranked all the way up at 1920x1200. Considering that the cards come pre-overclocked from Sapphire, is this normal or is there something I can do short of watercooling to get the temps down a bit so I can reduce the fan speeds (and the noise!)

Corsair 800D Case
Silverstone ST1000-P Power Supply
Asus P6X58D-E Motherboard
Intel i7-930 Processor
6GB Crucial Ballistix Tracer DDR3 1600 memory
2 x 128GB Crucial SSD in Raid 0
Seagate 500GB HD
2 x Sapphire Toxic HD-5850 2GB video cards in CrossFire configuration
Sony Optiarc DVD Burner w/Light Scribe
Prolimatech Megahalems CPU Cooler w/ 2xGelid FN-FW12-15-B 120 mm fans in push-pull
4xScythe S-Flex SFF21E case fans
2 x HP ZR24w monitors

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OK, here's a shot:



Based on what I'm seeing I'm guessing the card in PCI slot 1 isn't getting enough air since the second card is in PCI slot 2. The MB has a PCI slot 3, and I *think* the bios allows me to configure the PCI to have X16 on slots 1 and 3. I'm sure that would help, but I'm not sure I can fit the the second card in slot 3 since there are a lot of MB connectors it would have to sit on top of. I'm guessing this is what you would have me try though, correct?

yea try moving the 2nd card onto the 3rd slot, seems like the fan on the first card is being sandwiched and it can breath..

the third slot runs at 8x so make sure its configured to 16x/8x/8x and not 16x/16x/1x ..

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Thanks a bunch, I'll give that a shot and see how it goes. Will putting the second card in an 8x slot as opposed to a 16x slot have a significant impact on my performance? I'm guessing not since I'm only running at 1920x1200. If I have to do this to fix the temp issue it's pretty much a moot point though. :/ 

That solved my problem! The new temps are significantly less at around 50 C on the main card. Thanks for the help OvrClkr, I didn't know about the Afterburner app and it was very useful. Here's a shot with the new temps...

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