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780ti cs w/ acx sli cooling

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June 8, 2014 11:27:39 AM

I recently upgraded to a 1300 watt evga supernova, a samsung 840 evo ssd, and 780ti sc w/ acx sli. I know have come across this heat issue because of 2 acx coolers from what I've been reading online. I could return the card but microcenter does not have any superclocked reference cooler card to swap it out for. I run an i7 3770k at 4.4 ghz(1.285v). I also have a 1tb 7200 hdd a soundblaster z which is above the top card. My cpu cooler is a hyper 212 evo which is pushing air from the dvd drive to the rear exhaust. My case is a Corsair graphite series 600t with a fron 200m intake and a top 200m exhaust. I have the vented side on instead of the window but I have yet to add side intake fans.

Now i have been using heaven since the new drivers are showing white arifacts in valley. I have the skynet bios on both cards and when I run the programs at default I get 70 C on card one and 60 C on card two which isn't bad. What I did next was turn the voltage up to 1.212 just to see if I could handle the temps before even overclocking and what I get is 80-83 C on card 1(top card) and 60-63 C on card 2(bottom card). Now I know those are in range but something is getting to hot because the system freezes and I have to reset. My question is about cooling. I know I can add up to 4 intake fans on the side. I was wondering if I should face my evo to pull the air from the cards and push it out the top? I dont know much what else I could do. I have a good amount of space and decent wire management. The air exiting the top is cool while air exiting the rear is warm. Any suggestions would be appreciated.

Motherboard is gigabyte ga-z77x-d3h and i have 16g of ram. They sytem runs fine at default volts and i can even turn power bar up to 200% on default volts.

More about : 780ti acx sli cooling

a c 150 K Overclocking
June 8, 2014 11:38:46 AM

Best suggestion, is WATER COOLING!

On another note, you could also get more efficient fans in your case, that would help out with airflow. You could also run your 212 Evo in a push+pull setup.

Have you removed your 5.25 inch trays to help with airflow?

You seem to be only running 1 hdd and an ssd, so doing that should be no problem!

Is your power supply fan also facing downward?
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June 8, 2014 2:44:17 PM

amuffin said:
Best suggestion, is WATER COOLING!

On another note, you could also get more efficient fans in your case, that would help out with airflow. You could also run your 212 Evo in a push+pull setup.

Have you removed your 5.25 inch trays to help with airflow?

You seem to be only running 1 hdd and an ssd, so doing that should be no problem!

Is your power supply fan also facing downward?


Yes I was thinking of putting better cfm 200m fans as well as adding side fans with high cfm. I only have 1 tray in next to the power supply whose fan is facing down. Should I position the evo to blow up and pull from the graphics cards or keep it as in your pic above
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a c 150 K Overclocking
June 8, 2014 5:43:31 PM

I would keep the EVO as is.

Have you checked to see if unstable voltages are causing the crashes ?
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June 8, 2014 7:52:23 PM

amuffin said:
I would keep the EVO as is.

Have you checked to see if unstable voltages are causing the crashes ?


My CPU voltage were fine before the sli and even with both cards installed when sli is disabled all is a go. But with sli enabled at stock volts I can play any game but sometimes watch dogs causes the freeze at game launch but I think that's just watch dogs and sli conflicting. I've played battlefield 4 and arma in sli at normal volts. Swtor doesn't like sli so can't test in that. After messing with it all day I think I just need better airflow if I want to up the volts for overclock on the gpus. And watch dogs just needs patched. But could it possibly be my CPU needs more volts to handle the sli?

And what about this PCI slot cooler fan i see on microcenter's website. could that help in between the cards
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a c 150 K Overclocking
June 8, 2014 8:58:46 PM

I don't think you really need to overclock for any of those games :p 

Have you tried getting the most recent drivers for SLI?
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June 14, 2014 2:16:51 PM

amuffin said:
I don't think you really need to overclock for any of those games :p 

Have you tried getting the most recent drivers for SLI?


I agree with you. The overclock would be for arma and watch dogs once the game is optimized for sli if that ever occurs. And also future games. And yes I have the new drivers.

Now I have added 2 side fans as intake and added a second fan to the evo in push pull. I ran heaven with the cards in sli with voltages at 1.212 and i upped my cpu voltage to 1.290. I overclocked the sli(synced) to 1254 on the core with no memory overclock. It passed! and my temps were lower with a more aggressive fan curve. 77-78 on card 1 and 61-62 on card 2 with no hickups and a higher heaven score. The fans i got were just cheapies so I think I will save up some money and replace all the fans i have w/ some fans that have much better cfm. I will also try to have the side fans as exhaust and see if that makes a difference. Will update in a few days. Thank you.
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