After much trial and tribulation, I finally solved the problem of my PC
cooling problem which might help in this case. I might not have the
same setup as you but I have an exhaust fan on both the side and back
of my computer case. This is what I have found to be most efficient.
You need to keep in mind that for optimal cooling results, and for
cooling of the processor most importantly, a fan will be needed on the
upper-back side of the computer case to exhaust the heated air - keep
in mind heat rises so those fans on the bottom of your case will do
nothing more than circulate cold air. Also keep in mind that for the
most efficient air circulation inside of the case, there should be an
equal amount of cold air entering at the same rate heated air is
exhausted. An extra cooling fan to bring in cool air to the inside the
case would also help substantially as well.