Originally Posted by nattan
Does a double thick radiator offer twice the cooling?
will two normal 240's perform the same as a double thick 240?
and aside from needing faster fans are there any downsides to the thicker rads?
It does not give double the performance, but it can potentially
perform a lot better. The biggest issue is the static pressure of the fans you're using. You mentioned you're using the Noctua fans, and those are pretty good. If you're going for a thick radiator you NEED to have push/pull as it is more restrictive. Basically, use the thickest radiator you can use while still being able to use push/pull with your fans. Alphacool is your choice for thick radiators, or if you're feeling ballsy you could always go with the TFC Monsta (It's now the Magicool Monsta) but I have a feeling there's no way in hell you can fit that in your chassis.
All the Alphacool UT series rads have the same FPI so that isn't a factor picking between them, I'm currently unaware of any notably thick radiators made my other companies.
Originally Posted by ghostrider85
No you won't. Imagine stacking two radiators, the first radiator will draw fresh air in and the 2nd radiator will draw hot air from the first radiator.
Not quite the same. (Most)
radiators use a dual pass U-Flow design which significantly helps to eliminate laminar flow in the liquid chambers. Stacking radiators creates two U flows which, as you said, recycles the hot their. Having a double thick radiator still only has a single dual pass setup, it just has more chambers in that pass. More chambers means the liquid is moving at a slower velocity, which means more time will be spent being cooled by the air. So even though the ends of it will be being cooled by slightly hotter air, it will still perform significantly better. As previously stated it isn't a linear performance gain, so it won't be "double" the performance, but it will be significantly better.Edited by ZytheEKS - 7/13/13 at 1:59am