Well my desktop is very outdated, Athlon 3200, 1GB Ram, and a Radeon X1600. It plays Call of Duty, Unreal 2004, and SimCity 4 at max settings, but yeah doesn't play many new games except on the lowest setting (CoD4 is passable only at the very lowest setings).
My laptop is beginning to show its age as well, Core 2 Duo 5600, 2GB RAM, and a Radeon X1400HM. It handles Bioshock and CoD4 at the mid levels and any game from 2005-6 back at max settings.
It's a lot better than my older brother who is using a 600MHz P-III laptop I bought used in 2002. It had Windows 98 when I got it and the only reason it has ME now is because I had a disk for it. It's almost comical how jerryrigged the thing is, the keyboard, mouse pad, and USB ports all stopped working so it has USB card with a 4 port USB hub connected to it for keyboard, mouse, internet. The speakers don't work so it has desktop pair connected to it. The battery long since died and fell out, but the space where it used to be allowed the plastic case to break along its seem so it's taped together. The fans don't work so to keep it from getting exceedingly hot the keyboard has to be removed when used for long periods (also another reason it is taped together since the screws holding the keyboard held the case together).
However, the oldest computer I've seen in use by someone was the PC a guy I delivered a mattress to in 2006. It was running Windows 3.1 and like many computers from the early 90's had the speed displayed on the front of the tower. His read 75 MHz. I can't imagine what he did with it beside print word documents and play minesweeper.







