btw, after doing some more extensive googling, i found a thread that told about gigabyte g31 series mobos having latency issues in win7. solution was to change the energy default settings in a way that forces the cpu to always work at 100%.
once i tried this, dpc latency checker still gives me frequent readings around 500-1000 microseconds, but it stll says the machine should handle audio stuff just fine.
i'm still running the fireface on my laptop right now, so i haven't checked if the issues are solved, but the dpc readings certainly do look better now. this should be interesting....