Just playing with it for a few this afternoon, it looks like 935/1050 is what the max will be.
The voltage goes up or down more or less in increments. I'm using MSI AB 1.61 and the default voltage was .987 at halfway point it shows 1.087~ currently I can't get it any higher.
At higher frequencies it screen freezes then recovers, have not had it soft reboot yet.
It idles at 26c ! (near ambient) Max I've seen is 63c. It seems to not be effecting my H50 at all.
Just Cause 2 my frame rates , with same settings (o/c 4770), went from 50 to 93.
3D06 Went from 17800- 23655
http://i482.photobucket.com/albums/rr185/notty222/justcause2aug25.png
http://i482.photobucket.com/albums/rr185/notty222/justcause2NVIDIAAUG26.png