First of Let me get this out. I know this is an unfair test, As the Windows machine has a raid card, but understand the Windows machine is far more powerful. Specs as follows for Windows machine. Dual 3.0Ghz Intel Xeon (2MB L2 Cache per processor) 6GB of Ram @ 400MHz 10k RPM SCSI Drive ATi x700 Pro Graphics card. Specs for the Ubuntu system 1 x 3.0GHz Intel Xeon (2MB L2 Cache) 4GB of RAM @ 400MHz 7200RPM Sata Drive nVidia Quadro NVS 280 Both machines have the Same motherboard too. Hyper Theading enabled on both machines. And both systems are 64bit OSs