Windows 7 - I can't believe that windows 7 runs great on 512mb ram

System Manufacturer/Model Number Dell Dimension 9200
OS Windows 7 Ultimate
Memory 512mb ram runs GREAT
Graphics Card NVIDIA GeForce 7300le

System Manufacturer/Model Number Built them myself, Science Experiments !
OS Xp Pro SP3 x64, Win7 x86 (Ult 7600), Win7 x64 Ult 7600, TechNet RTM on AMD x64 (2.8Ghz)
CPU AMD-64 3000mhz, AMD-32 2400mhz, AMD-64 3200mhz, AMDx64 2.8G
Motherboard SIS 755, ECS-K8M890M-M (Ult 7600), & others
Memory 2gb, 4gb on the Ult 7600, 4gb on Technet RTM
Graphics Card Draw my own Graphics, several nVidia cards
Sound Card on motherboard
Monitor(s) Displays 19" flat scr, 19" Acer widescr, 22" Emprex Widescr, 23" Acer
Screen Resolution 1280 x 1024, 1440 x 900, 1920 x 1080

Keyboard Compaq & Dell recycled from GoodWill
Mouse Made in China Optical Wired Mouse
PSU 430w, 550w, 600w, etc
Case All Generic Full Towers
Cooling Open Air & a few fans
Hard Drives 6 pata Ide HD's & 2 Sata HD's added 80gb external on Ult 7600 computer, several extra 1tb & 2TB SATA HD's
Internet Speed Fast Cable InterNet
Other Info Linksys Routers, switches, & Hubs Too Many USB Flash Drives to count, Biggest is 64GB ! Eight computers in my home network. Twelve computers at my business network. Linked via TeamViewer ! Lots of old used spare computer parts everywhere!