Ok, so basically each set of three mosfets needs to be cooled by the heatsinks, (and I will cover the vram in heatsinks as well). I have been looking for some heatsinks for my mosfets online now, and it seems it can be tricky to find the right size! They are all very close together (as you can see from the picture, so individual heatsinks could not be larger than 5mmx5mm, which I have not been able to find at all. If I were to get a larger heatsink to cover each set of three (each set is a 10mmx13mm square) is that ok to do?
I have been looking at these two options then for my mosfet cooling:http://www.frozencpu.com/products/17951/vid-196/VGA_Aluminum_Heatsink_w_3M_8810_Adhesive_-_13mm_x_13mm_x_7mm_-_Silver.html?tl=g40c21s226#blankhttp://www.frozencpu.com/products/15573/vid-184/Akust_Copper_Memory_Chip_Heatsink_-_13mm_x_12mm_x_5mm_-_4_Pack_RS00-0602-AKS.html?tl=g40c21s226#blank
There seems to be a number of differences between these two. First of all, one is aluminum and the other copper (from the reading I have done, copper is better). They are both adequate size, and would cover each set of 3 mosfets adequately. However, the copper ones look more solid with very short fins, and are 5mm tall. The aluminum ones seem to have a thinner base, and have taller fins at 7mm. The taller fins from my understanding means more surface area and, assuming good airflow, better cooling. But I imagine this 'advantage' just serves to even out its performance since it is aluminum and not as effective as a thermal conductor as copper, so ultimately they will be similar? Some input on this would be awesome.
The other factor of course is price. I would need 8 heatsinks for mosfets as i have two cards, which for the aluminum sinks is $10 (cad) versus the $18 (cad) for the copper ones. Of course I'd prefer the aluminum ones at half the cost unless there is something here that I am really missing?
edit: also yes I do have the case with 1 rear and 2 top 120mm exhaust fans currently.