Hi, A Dell PowerEdge 2400 in my office has a an option in the system BIOS for setting the fan speed to a medium or high setting. The fan is at the back of the case with a black plastic baffle that channels air from the front of the case across the CPUs and memory cards and the fan exhausts it out the back. There is no CPU temp indicator in the BIOS that I have found. My question is how to determine if the machine needs the high speed setting. The fan is quite noisy at that speed in our small office. The machine has 5 18GB SCSI drives in it, and it backs up remote data at night.