There is NO truth behind that ... Sapphire is THE SINGLE BEST COMPANY to buy a HD-6950 from with hopes of Unlocking one ... and also the EASIEST as they basically Pre-Flash the 6970 Bios ONTO the 2nd bios for you. Not sure where you heard this but many guys are still unlocking the DIRT3 cards today ... I know someone mentioned something on a post he read off NewEgg about it, but come on you should know by now to take those reviews with a grain of salt ... some guy upset HIS card didn't unlock now claims NONE of them will kind of post you know ... Anyways, the Chance your GPU Chip is LASER CUT and won't unlock is something AMD controlled not SAPPhIRE, it's a complete crap shoot luck of the draw type of thing, but Sapphire's tend to have good unlock rates and my Sapphire TOXIC Club has a successful unlock rate of between 81-90% ... that's the BEST you're going to get, PERIOD !
As to the OP's question ... well DUAL 6950's or 6970's (if you unlock & OC them) are a Great Combo and will out perform a single HD-7970 even OC'd ... however you'll be locked in with them and have little room to upgrade further, so if your budget down the road permits Dual 7970's well it's hard to beat that right now that's for sure but damn that's a LOT of scratch on graphics cards ... then again WILL YOU EVEN NEED TO UPGRADE beyond TWO HD-6970/50's for the next several years ? those cards should run evry game out and coming down the pike for awhile IMO.
Originally Posted by Bigm
I was going to buy those cards but was told that Sapphire made it so you can't unlock them anymore. Don't know if there's any truth behind it
but I ponied up the money for a 7970 instead.