No worries, mine unlocked beautifully, and I run it at 380/800 usually. (NickS, why not see if you can get your card's memory as fast as mine went... 900Mhz with no noticeable artefacts and 960Mhz before the screen started arsing...)
I'm not sure. My card is being an arse lately. idk wtf is wrong with it, I just wanna leave it alone. once i start foolin with it it bitches at me for a few days then goes back to normal