I'm running it at 45x100=4500Ghz right now. Just did a quick and dirty in Win 7 using TurboV. It failed some wus at 46x100, but is doing great at 45x100. I've left it there for now, I've got another SSD coming in and when I get that I'll load up Ubuntu 12.10 on it and try manually OCing the thing and see what I can get out of it. It's doing (depening on wu) from a high of 73k ppd to a low of like 38k ppd...with and average I think around 52-54k ppd. Know I can do better than that though, just wanted to get it up and in the folding for now.
How are you running yours now?