At the moment I am currently "upgrading" my ThinkPad A31 (see link in signature for more!), but I do actually have an IBM desktop PC, a ThinkCentre 8177-77G, these are my specs! Which like the ThinkPad, I have upgraded to all my ideal specs!
OS: Windows Vista Ultimate (same as my ThinkPad
RAM: 2GB (definitely NOT the same as my ThinkPad at the moment!)
HDD(s): 1x Hitachi 80GB - IDE (Vista is installed on that one, believe this came with the PC as standard)
1x WD 400GB - SATA (nicked this from a faulty External HDD, turns out the only faulty thing about it was the SATA to IDE adapter that the External HDD used. I have both SATA and IDE ports in my ThinkCentre!) - I don't have a floppy drive in my PC anymore as I put the 400GB HDD in it's place!! (400GB hard drive is more importatnt han "floppy" drive!)
DVD/CD drives: 1x Sony DVD RW drive - IDE (believe this also came with the PC as standard - set as master)
1x HP DVD drive (not RW!) - IDE (I installed this myself, set as slave)
"Extras!": Bluetooth USB dongle (ocassioanlly works!)
nVidia GeForce 6.0 graphics card (bought this as playing games on my PC made by EA and Atari!)
not strictly the PC but I have a really cool mouse that looks like a car
All round speakers, but thanks to my sound card, only 3 of the 8 can be used, oh well!
Screen: BenQ FP7IG 17" flat - silver
Keyboard - some HP model!