SLI Build Cooling Issues

policiacaro

Honorable
Sep 1, 2013
12
0
10,510
Im currently running an SLI (2x) build with Geforce 780 Ti cards in a Corsair Carbide Air 540. The top card idles at around 45-50, and the bottom is in the 40s or high 30s (all temps in Celsius). I am wondering why I am idling so high, and I thought it might be because I changed my CPU cooling to a closed loop liquid solution, I am using one of the Corsair single fans, I think its the H90. I have the fan pulling into the radiator, and I think whats happening is that its cooling isnt effecient enough, and its gradually heating up my case and creating an air pocket of warmer air, as I am seeing higher temps in the rest of components as well. Could reversing my fan on the radiator to blow outwards drastically change this, or is specifically because of the way the reference ACX coolers work on the 780 Ti's?

How can I fix my high idle temps? I only ask because I saw an almost identical build online where someone was using a different Corsair high airflow case, and this build was idling at around 30 on air.
 
Solution
Having the radiator fan pulling in cool air will mess up your case airflow and increase temperatures inside of the case. You should have it pushing out the hot air.

Does your case have the holes to mount another intake fan on the side panel? That would also help your GPU temps.

Yogi
Having the radiator fan pulling in cool air will mess up your case airflow and increase temperatures inside of the case. You should have it pushing out the hot air.

Does your case have the holes to mount another intake fan on the side panel? That would also help your GPU temps.

Yogi
 
Solution

policiacaro

Honorable
Sep 1, 2013
12
0
10,510
Sorry if I was unclear, the radiator is at the top of the case, and the fan is pulling into the radiator instead of blowing out from the radiator. I unfortunately dont have any side panel mounts, but ill switch my fan as soon as I get home today and update this
 

policiacaro

Honorable
Sep 1, 2013
12
0
10,510
I switched the direction of airflow on the radiator fan, so the air blows outside the case, taking the heat off the radiator, and that really helped. I also decided to set one of my 780 Ti's as a dedicated physx card, considering I dont really own anything that requires 2 of these cards running in tandem SLI, especially since im gaming on a 1080p screen. This really helped my temps out alot, as the cards are not stressed/communicating as much. My top card idles at around 30-40 and the bottom doesnt ever go higher than 30, but I just stopped monitoring it all together because it runs so cool.
 


Sounds like you've made really great progress! Congrats, and thanks for the feedback!

Yogi