Originally Posted by hertz9753
The best thing about a 660 is that it only needs one six pin plug from your psu. You could also take the side panel off of your case while your looking.
side panel is off. otherwise things get cranky. as for power, I'm talking to Lutro0 about some custom cables. right now I'm using SATA - PCIe adapters with no problems. i don't think the 460 needs dual 6 pin, other than because the BIOS won't turn it on without them. either that, or it doesn't pull any real power from the PCIe bus. either way, two 6 pin + the slot = 75W*3 = 225W, which seems impossible to dissipate with the stock cooler when compared to a 6950/7970...
when I put my hand between the GPUs right now, when I stack the 6950 and the 7970 next to each other, the air between them is cool. whatever card the 460 is under sucks up 50% hot air with the hand test. this is reflected in MSIAB.
no new pic, but I swapped the 6950 and the 460 (and fed it power, obviously). the 6950 temps went way down by putting it on the bottom. No effect on the 460, about 5C bump on the 7970. I will likely be able to run the side panel on with the 660 i linked to with no temp penalty. I have front intake fans, but they're not able to overcome that kind of laminar flow that far back. maybe if I swapped them for 38mm delta 120s...
*cue sound of ear drums bleeding*
EDIT: updated with new pic:
The 460GTX vents hot air out in 3 main places.
#1: the back slot. it actually has a full PCI slot exhaust port - pity it doesn't make better use of it.
#2: the "front".
#3: the side - it acutally pushes out a LOT of air between the shroud and the board.
the split is probably something like 40% rear, 33% side, and 27% "front".
hence the 140mm fan to eject the hot air away from all three, and to create flow down the middle between cards. really the only card that gets the short end of the stick here is the 7970 - it eats up all the hot air from the 460 and has to unload its heat, and its own out the back. or at least it would, if the side panel were on, and the 460 is running.
reminds me of when I had the 8800 Ultra in the case for toying around with CUDA. I taped off the slots and forced it to eject all its own heat out the back. net result, same temps on the 8800, slightly higher (<5% more) 8800 fan speed), much happier everything else in the case. that card was a power whore though. it added 75+ W of idle(!) heat to the kill-a-watt reading. dang.Edited by u3b3rg33k - 12/1/13 at 11:13pm