Hi, I have two overclocked 660s and I've been having an issue that from what I've read on the net seems pretty common, ie a few games crash, then work fine if I remove 25mhz or so from the overclock. This happened when I only had one card too BTW. My problem is that if I lower it using nvidia inspector/gigabyte's gpu app/evga precision et al, after a seemingly random amount of time the card just reverts back to the full 1033 mhz and from then on it's impossible to lower it back down. Is there a more effective way of doing this? Is the overclock hardcoded or is it set in the card's bios? This isn't a heat issue btw, I never saw my card go over 63 (during benchmarks, not games) when there was just one and with two the hottest one never goes over 58c (also in benchmarks).