negative, I have a stable 3.6 GHZ, max, I can hit 3.9 and crash out the ass or run pi 1M and thats all. I cannot encode DVDs, or anything useful at this clock.
After 3.6 GHZ I do not consider it stable by anymeans, and I far from did the "24 hour dual torture test" type stuff while @ 3.6, but...