Thats just for CAD 2K4,the system requirements for sketch up are below:
Hardware and software requirements are as follows:
System: Mac OS X 10.2 or Higher Microsoft Windows 98, NT4.0 w/SP3, 2000, XP
Minimum Requirements: 400 MHz or faster PowerPC G4 128 MB RAM 20 MB free disk space for minimum installation 400 MHz processor64 MB RAM20 MB free disk space for minimum installationWindows compatible pointing device Microsoft Internet ExplorerTM 5.0 or higher.
Recommended: 800 MHz or faster PowerPC G4 256 MB RAM A 100% OpenGL compatible 3D Hardware Acceleration card A scroll-wheel three button mouse. 800 MHz Pentium III processor or higher256 MB RAMA 100% OpenGL compatible 3D Hardware Acceleration card running in 32 bit color modeA scroll-wheel three button mouse
A member from another forum Im on is always praising Sketchup.Heres a link to his site:
f700es