We have an in-win q500 full-tower case. The power supply has a fan blowing out the back. We added an intake fan in the fan cage on the lower front. On the upper front we have a bay-cooler drive fan blowing in. There are two places in the case on the back where we could mount additional fans: one on the lower half (where the mother- board and the add-on cards are), and the other on the upper half (where the power supply and the drive bays are). If we were to add more fans, I suppose the upper fan should be an exhaust fan. If we were to add a fan on the lower back, should it be an exhaust fan (air blows front to back) or an intake fan (air blows bottom to top)? (We have a slot-A athlon with a dual-fan processor heat-sink on it, and an agp video card that came with a little fan on the video chip. In addition, we have a scsi card, a cheap nic, and a legacy isa sound card.) Thanks for any explanation of the right way to do this. Jim Meagher <[log in to unmask]> wrote: > ... > Your system sounds like the perfect example for why. > There *IS* a fan -- it is mounted in the power supply > and most likely blows air out the back side of the case. > There are holes in the bottom of the case that were > strategically placed there to let fresh cool air in as > the fan pulls the hot air out.... Frank R.Brown Frank.R.Brown@MailAndNews The NOSPIN Group provides a monthly newsletter with great tips, information and ideas: NOSPIN-L, The NOSPIN Magazine Visit our web site to signup: http://nospin.com