The system hooked up to the 30" is:

(Dell XPS 720)
Quad Core 3.2Ghz
4GB RAM
Dual 768MB GeForce 8800 GTX

The other 2 systems I have are:

Dual Xeon 2.66GHz
2GB RAM
256MB Radeon X800

2.4GHz 1GB 128MB Radeon

I just need to update those 2 so they don't bomb while running 2 copies of WoW.