XP can run on 64MB of ram.
Get more ram and a new graphics card and it'll be alright.
I've got
AMD Athlon 64 Dual Core 4200+ 2.21GHz
2GB RAM
NVIDIA GeForece 6150SE - I know it's stuff. I can't upgrade unless I buy a new power supply.
1.3 TB Harddrive Space
2 DVD-RAM Drives.
etc.
etc.
etc.