I am still trying to decide whether to get the Mac Pro or build my own PC to run Windows and Linux (there are softwares that cannot run on Mac OS). In terms of performance (floating point computations), how does the 8-core 2.8GHz MacPro compares with the Intel Core 2 Extreme QX9770 (4-core) 3.2GHz + MSI P45 Diamond motherboard combination? For your info, this motherboard supports FSB at 1600(OC) and DDR3 2000(OC)/1800(OC)/1600(OC),...Thanks.