I did the MOD to support folding. Things were OK at first, but then I got hit with new Work Units that really taxed my GPUs. They were running hotter than Furmark. The recent work units have been quite tame. My GTX670 is simply set for 145% power, folding hasn't pushed it much above 100% lately. I never did extreme OC as I rather not put errors into the folding. I'm not sure how it error checks.