Recently did a similar upgrade. Went from a P4 2G, 2G memory MSI mb to an Asus P5KPL-CM mb, Intel Core 2 Quad Q8400 @ 2666MHz, 4G memory. Running MB, BMW, VW/Audi and Porsche EPC's in W2K VirtualBox with 1 processor and 1G reserved. Rest of box on Windoze 7 x6... Login to read more.