Originally Posted by Slink3Slyde
In my experience its subjective. I had and MSI Twin frozr 3 HD 7950 that was 2-3 c cooler with an intake on the side in my old case, but the ACX cooler in my EVGA Gtx 780 cools better with exhaust. Generally its said reference cards with blower types are better with side intakes though. Personally I would advise to try both and see which works better for you. Its not that hard to flip a fan around and test for yourself.
It can depend in many factors.
Sure. I speak specifically of the R4 with an open air 290. You also have to consider other temps though, side fan as intake on hot gpus in xfire raised mobo and cpu temps for me, though it was worth it since the gpus were the hottest components and my mb/cpu temps remained acceptable. But Puget iirc did conclude that as a general rule, intake side fan works better for gpu temps..
Originally Posted by joeh4384
I can see SLI or Crossfire how it would really benefit the top card due to the bottom card choking off a lot of airflow.
You know what works even better is this:
It's a $10 fan bracket from moddiy, it's just a pci bracket with clips to mount 1-3 80/92mm fans you provide. Assembled it looks like this:
If you have one card you can insert it into a pci slot a few down from your gpu, if you have xfire/sli and a +1 expansion slot to the side like the R4 has, you mount it perpendicular to the cards and it works wonders. When I had a Tri-X 290 on top and a PCS+ 290 below it, my temps in Far Cry 3 looked like this with ambient around 20-22:
Pretty freakin stellar imho.
Originally Posted by DrockinWV
Here is the mod I did to my R4. Once I added SLI 970's my case temps went up to 48c. Now with this side exhaust fan temps are down to 37c...
Just eyeballing it, your diy fan mount is placed higher than the fan mount on the solid panel R4. The bottom card for sure is not benefitting. In any event, yeah, more exhausts, anywhere in the case, almost always means lower case temps. But what about the component temps? And did you try intake?