this is no secret, and no real suprise to me....but i just had to show the effects of the side blow hole i just installed. this has dropped cpu temps about 15c during prime95 (now 40c as i type w/ prime going)

just goes to show the benefits of a side intake over the cpu. i used a cd spindle cover cut down and hot glued to on the 4 corners of the fan. not exactly the prettiest, but it does the job well. it may look like there's a gap between the window and the shroud, but it's just an optical illusion because the hole is off center a little. and if you're wondering about a fan grill, it only increases noise so i'm not going to use one.