My P5Q Pro Turbo went to sleep in mode S1 without having installed Asus s/w. Waking and sleeping is excellent compared to Win XP. LAN and audio drivers that came with Win 7 worked well. If you have the time you may want to uninstall Asus drivers and see if WIn 7 drivers work.
I built a new system using Asus P5Q Pro Turbo for Win 7 64-bit and the Asus s/w that came with the mobo wouldn't install but I don't it's MS fault. Asus needs to proved a Win7 patch