Originally Posted by ryboto
The more surface area for cooling, the better. I understand the liquid volume of a 60mm rad might not be that much more, but all of my understanding of heat transfer says it's a better bet for the thermal load I've got with the 290x. A liberal estimation of dimensions suggests I'd have ~6mm of room with an SFX PSU, 4 fans and a 60mm rad. I didn't do any physical measurements yet though.
Ideally, yes - but with higher rad depth, the air pressure drop and air flow rate will both be worse. Again, check martins site - the cooling from a 30mm and 45mm alphacool rads at 1000 rpm is VERY close.
My setup had 5mm free space at the top (top fan to external case), and 15mm at the bottom (bottom fan to PSU). To my mind, you should stick with 45mm max radiator and focus on sandwiched 25mm thick fans. If you decrease the space just above the PSU, you could really kill off air flow.
One thing I was toying a bit with was to flip the PSU so the psu fan would be pointing *into* the rad (and flipping the fan inside the PSU of course, or the the top rad fan). This could allow for a very nice cooling WITH a normal ATX PSU.. Might take some doing
Let me know how you are progressing!