I have same problem, in Win Xp run well, but in Win7RC and in Win7 Ultimate suffer stutters and sound reverberation, i tried differents solutions and for the moment not found fix.

This issue is not problem for specs, if can run well in XP, system powerfull is correct.

In my testing, i think is problem of Asus/Intel Chipset drivers or Asus/Realtek audio drivers.

Last night i try to installing drivers of Motherboard, remember im using integrateed Realtek sound, with audio drivers of Realtek (not ASUS) installed and updated. After install driver of Motherboard (chipset) i try to play RoF and OMG run well, no stuttering. After i reinstalled Audio driver of Realtek and try RoF, but return to stutters problem.
After this i tried reinstall Motherboard driver, but i canīt, i tryed uninstall audio drivers and installing old drivers, but not fix problem, after all i restored Windows 7 to point in back have no installed ASUS motherboard drivers. Ok now install ASUS motherboard drivers and NOT install audio Realtek drivers, but this now NOT fix problem.

With all this, i think problem is in Motherboard, in integrated Realtek sound. The simple solution buy soundcard is not valid for me, i not have money for this buy (bad times).

POSIBLE SOLUTION

I tried launch RoF in compatibility mode with Win XP SP3, and issue disappear, now RoF run well.