Basically all stock with a few voltage adjustments, right? CPU-NB up a it, ram set correctly, that sort of thing?
And your getting crashes in game after a couple of hours?
And you've seen some 'Hyper Transport Sync Flood' errors lately?
Yet, this setup passes Prime Blend (not sm fft's only) for over 9 hrs.?
Any random, 'not-doing-anything-but-surfing-the-net' sort of thing, reboots in Windows?