weird. i have this old computer of mine, now i just type on it basically, and it runs media composer 4 really nice. its a SINGLE CORE Athlon 3200+ with 2gb o memory and a ati radeon 4670. i find it suprising that your BETTER radeon wouldnt work with avid, while mine worked flawlessly, all bcc effects were working, renders worked, and 3d was wroking