Working on a PowerEdge 2650 today. This is an older machine, but it's still a good one, especially since we sell it for so little. It can take two processors, usually 400 mHz front side bus or 533 mHz, and up to five SCSI hard drives. Onboard RAID is an option, with battery backed up cache. One thing that threw me when I first started working on them is that the hard drives are numbered counter-intuitively. The fact that it starts with drive 0 didn't phase me, but slots 1 and 3 are below 2 and 5 respectively. However many 2650s I work on, I still get tripped up by that about half the time.