sleep will not work wont fall asleep screen shuts off but motherboard keeps running on ipc and snow leopard retail. sometimes shuts off and comes rite back on with windows7 ultimate 64 other wise the same. i'm using boot think. tried s1 s3 and auto. restart and shutdown work. my mother board is a asus p5kpl cm. everybody says works out the box with no bios settings or custom disk settings retail or ipc. video is 8800gt aqua-flashed fx 3700 working great. prossesser e7500, memory kingston hyperx pc8500 and others thank you for your help. both leopard and win7 say no virtilization.