I have a dual 400 PII and 256 Megs of Ram. Render Times in poser are next to nill :) I am reunning under Win 2000 2128 and everything works nice. I can run Max R3 Poser Bryce and Photoshop with no slow downs. I dunno but this is nice and fast. I built this hummer myself and have had no truck with problems. If speed probs are your troubles bro, it probably means overheating. Check in your case and see A) How many cooling fans you have (I have 5, 2 on chips 3 in case itself to push air out and in.) b) BIOS setting for overclocking (DO NOT OVERCLOCK no matter what! It burns up chips and on duals it is very dangerous to chips mother board and fires.) c) Your OS. Are you running Win NT 4? What SP? SP5 solved a few problems with mother boards and chip configurations....If your under 2000 What RC? also check your priorities...Is Poser 4 using both processors? Hope this helps. Local