I'm not sure if the low-level DX9 overrides are supposed to work in that OS, but is there a trick to forcing them through RivaTuner? I've tried all four available override modes, but none of them were successful. I'm trying to force four resolutions/refresh rates: 1280x960 - 120Hz 1280x1024 - 120Hz 1600x1200 - 100Hz 1920x1440 - 90Hz All of them are supported and were tested on my monitor, naturally. They also work on the desktop. Just not in the majority of games - no matter what I've tried, so far (there are a few games that assume the refresh rate of the desktop if their resolutions are the same - i.e. no resolution change on game start). If it's not supposed to work, would you, Unwinder, be willing to try and tackle it? Drivers: 182.06 WHQL RivaTuner: 2.24 PS: Also tried Refresh Rate Patcher and RefreshLock - to no avail. PPS: There's another possible reason to the problem - there are no official x64 drivers for my monitor. I've made one through RivaTuner, but I'm not sure how accurate is the info EDID provided it.