helo. i just bought an workstation dell precision t7400 with 2 procesors intel xeon quad core 3ghz, 4 gb ddr2, 2x nvidia geforce 8800gt. i am using windows xp x64 and when i am randering with archicad 12 i see in task manager only one cpu working of 8, is there a setup to work with all of them to rander faster