I have mounted my Enermax EG465P-VE(FCA) PSU outside the case. Part of the reason was to make room for the window in this small LIAN LI PC-50 case.
Now the PSU acts as my blowhole (originally the case included an 80mm blowhole in that location.)
As a plus, air from the PSU will no longer recirculate back into the case through the large vent you can see in the picture. CPU cooling is improved by the fact that I now have room for my Thermalright AX-7 with 80mm fan.
Since the picture, I have added an 80mm intake (Antec 3 LED at 7 volts) just below the window, which helps cool both the video card and hard drive. The hard drive is moved back further than stock and the front intake is disabled/closed off.
My total fan count for the entire system is four fans, but I wonder if the PSU can get away with just the 92mm, so it will still double as the case blowhole.
Or maybe remove the 92mm fan and close off the huge vent area for less direct noise? All case vents are closed off - maybe if I replace the 80mm PSU fan with another Antec at 7 volts for the same intake and outake?
I suppose trying all the combinations would be the best way to go but that would be cheating.
I suppose I'll look for me thermistor just in case...