Radeon 6950 Unlock

Yes. No.

Either one of those could be the right answer. AMD locked them for a reason, so it might unlock fine or it might not. Also remember that most new 6950s don't unlock at all. Do your research first!

From what I understand, if it has a dual-bios switch, it may be stable and if not it will still be safe. If it does not have a dual-bios switch, it probably won't be stable and will probably not be safe if it doesn't unlock properly (ie. you'll brick it).

thanks... btw what brands do you consider in a PSU when it comes to price and reliability?

Antec, Corsair, Enermax, Seasonic, and XFX. Look to those five.