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Optimal SLI Positioning?

post #1 of 20
Thread Starter 
So I am doing some testing with my 460 SLI setup. As usual, I am seeing huge temp differences from card 1 to card 2 (99C max vs 76C max with heavy OC in Vantage run). At idle, it is 42C vs 31C.

I cannot get any space between my cards because of my PCI-E lane spacing and case. In a HAF 932, I cannot put a dual slot GPU in the 3rd PCI-E slot because the PSU is right there, so I am stuck using slot 1 and 2.

I am wondering which GPU would be best in the top slot? I am running 1 ASUS DirectCu 460 and 1 MSI Cyclone 460. Does anyone have any theories on which one would run cooler in the top slot? I was thinking the DirectCu would run cooler in the top slot because it relies more on heat pipe cooling (2 heatpipes vs Cyclone's 1) so it should depend less on the airflow it won't be getting.

My other option would be to put my PSU outside of my case and use the 3rd PCI-E lane, but this seems to be a pretty big hassle.

The cards made it through a full Vantage run at 850/2000 so I found it successful, however 99C is not something I am completely comfortable with.

Any suggestions/comments would be appreciated! Thanks!
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post #2 of 20
Just move your psu to the top position.Then put the second card in the third slot u will have to do a little modding on the back of the case for the card to exhaust air properly,it works fine this is how i have mine set up
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post #3 of 20
Quote:
Originally Posted by OutlawII View Post
Just move your psu to the top position.Then put the second card in the third slot u will have to do a little modding on the back of the case for the card to exhaust air properly,it works fine this is how i have mine set up
I would with go this. Dunno why CM didn't have the mobo mounted higher, and have no 2nd power unit option,..

Use The top PSU mount until you get get watercooled GPUs?
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post #4 of 20
Thread Starter 
Quote:
Originally Posted by OutlawII View Post
Just move your psu to the top position.Then put the second card in the third slot u will have to do a little modding on the back of the case for the card to exhaust air properly,it works fine this is how i have mine set up
I didn't even realize you could top mount a PSU in this case..but I think I see the panel now, just needs to be unscrewed and moved to the bottom where my PSU is now to cover the hole.

Could you go into a little more depth about the modding of the case? I am very interested in this solution, sounds like it's the perfect solution right now.
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post #5 of 20
U will see it once u mount the gpu in the bottom slot,u simply have to cut the tab at the back of the case and bend it inward slightly.
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post #6 of 20
Thread Starter 
Quote:
Originally Posted by OutlawII View Post
U will see it once u mount the gpu in the bottom slot,u simply have to cut the tab at the back of the case and bend it inward slightly.
Any idea what kind of tool I need to do that? I just saw what you were talking about, however it looks like it literally needs to be cut through and I don't have access to a shop :/

Any suggestions?

Just got through moving the PSU to the top and rerouting my wires and cleaning things up. I couldn't get the SLI installed in the 3rd slot because I don't have a long enough SLI bridge but, that should be remedied soon.
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post #7 of 20
I used a tin snip, and it doesnt have to be cut all the way thru just the top corners then bend it down to direct the airflow out of the case. As far as the sli bridge i used the 3 way sli bridge that came with my board
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post #8 of 20
Here is a pic see if that helps
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post #9 of 20
Thread Starter 
Going to see what I can do with it..starting to wish I had gotten the HAF X at the time
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post #10 of 20
With your motherboard, which card will be the "#1" card. I'm guessing it's the top card on your mobo, so it's always going to run hotter anyway. I'd probably put the DirectCU card above the Cyclone. If you're patient, test out both setups.

If you manage to move the PSU, will you get 16x / 16x if you use the top and bottom PCI-E slots?
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