and i have now installed it. i didnt actually drill out a hole but just drilled lots of small holes...and used the hole already there from the 80mm fan i had. temps did drop but not as much as i would have liked. my CPU is now at 38 (idle) but reaches 50 anytime i play a game or put it under stress. and other case temps seem to be fine, around 34, and 30 for hard drive. i was thinking of flipping the fan around so instead of sucking air from the case i will blow air in....is that a bad idea? in my mind its a good idea excpet that im going to be blowing air towards the processor, agaisnt its own fan. anyway im just real concerned about the processor right now because i would like to OC it.
Check out what I did on my rig with this cheapo fan and the results on my rig's temps (may give you some ideas):
My AC fan blows into the case on the side vent directly over the stock Intel HSF so what actually happens is it lessens the stress on the Intel fan (I see the revs drop a little in Speedfan). Now if your CPU fan blows sideways and you have your AC fan blowing air against air, I have no idea how that will affect it (mine blows in the same direction as the CPU fan). I also tried to use it as an exaust fan but the temp drops were not as good as when used as an intake fan so your comment makes sense. I have been running this setup OCd now for over a month and have had no problems whatsoever...and when FPS gaming, the highest I have ever seen my core 2 duo go (C0/C1/CPU) is 46/44/36C with the fan on at around 65% (and it's more silent than the case fans!)
Now, I would like to learn more about the effect EMI (Electro Magnetic Interference) can have on a system as H3||scr3am mentioned (although I have not seen any issues on mine at all). Just curious if anyone has additional comments on this: