Originally Posted by Nobsod35
using a Cooler Master V850 the fan is placed on the bottom of my case and pulls air up and out the back.. Do you know of any good airflow 120mm fans
That may be a problem, if there is heat trapped between the GPU and PSU your back fan won't exhaust it from the case! I know it sounds weird to set up so many exhaust fans, but I would give it a try. Your PSU isn't going to overheat by pulling warm air away from the GPUs. More than likely, the PSU is running with *plenty* thermal headroom.
To answer your 2nd question I'm not an expert on airflow, maybe someone else can pitch in here. I know Silverstone has a 120mm AP "Air Penetrator" series that is designed to channel air through the case. Don't know how well it compares to other fans, I haven't purchased many fans because I simply re-configure them and that usually solves my heat probs.