Originally Posted by kikkO
A single 140mm is a bad idea. Since no single 140mm can beat two 120mm fans.
His case already comes with a fan controller.
He doesn't need to spend more money than he should. All he needs is two strong 120mm intake fans and two low rpm fans up top.
Check out my rig pics, I spent over $300 testing various 120mm and 140mm fans. I speak from experience, not some armchair knowledge I got from the internet.
I'm basing my suggestions on the personal experience as well. While I have not specifically tested various fans I have observed that the largest effect to an air-cooled GPU temperature comes from having a fan directly next to it at the side-panel. While the effect of other fans is there if you dont have the fan on side-panel the fan closest to GPU's has the largest effect. It does not matter as much if its 140 or 120 mm as its on the sidepanel and roughly on top of GPU's.
Something like that
A single 120 or 140 mm is enough to cover both GPU's in most traditional layout cases. Sure, having more is not having negative effect, but bulk of the work is done if you have at least one 120 or 140 mm one on side-panel. If its a 700 rpm quiet one or 2000 rpm beast is no longer as important. Sure there is temperature difference but the temp difference is larger between no fan and weak fan than between weak fan and beast fan on the side-panel.
Edit: If budget is an issue I have personal experience with couple of low'ish rpm quiet ones that would do the trick. Both are still at discount in Aquatuning.de - not sure if shipping from there is worth the trouble for the OP though.
An 120 mm one for 2.38 euros - http://www.aquatuning.de/product_info.php/info/p1123_Coolink-SWiF-1201-17-dB-A-1200-rpm---120x120x25mm--.html
- I have 9 of them on my radiator and they are more quiet altogether than a single Shark I mentioned earlier.
An 140 mm for 4.76 euros - http://www.aquatuning.de/index.php/cat/c846_Nanoxia.html
- very quiet 700 rpm ones. I use them in my watercooled case for top and bottom intake for giving motherboard components, especially VRM's some air.Edited by Carniflex - 6/29/12 at 11:28am