No, Archicad doesn't.
But, 8 Gigamegs is good overall - you could be doing Photoshop, run the OS, have Artlantis renderings going strong AND run in Archicad without noticing a slowdown. I have 16 Gb and my MacPro never goes much over 12. A waste of capital!!!
If you want to spend money making Archicad go better, get the 512 Mg video card - this will make OpenGL work better.
Dwight Atkinson