I have a R3 and have only started with my OCing since I'm getting a new case and I think I have to re-install my HS as my temps are pretty high for my cooler...
Anyway, so far I'm running my i7950 @3.4 with my BLCK set to 148@ stock voltage. That puts my Mushkin Blackline @1720 (rated for 1600 CAS7) @1.65v. I also lowered my "uncore" voltage from 1.4 to 1.24 without any issue (may go lower but so far hasn't affected temps). 1.4 was "auto" settings. All other settings are stock so far.
Once I get my temps to where they should be with my cooler (and in the new case maybe) I'll shoot for more speed.
And so far I've used TurboV, BIOS, and the remote OCing software from another laptop (in the middle of stress testing) without issue.