He already owns HD 6970 not asking to flash.
Unfortunately there's no reference design HD 6950 available out there, only ref. designed models are flashable, you'd be taking high risk if you try to flash a non-reference designed one.
Looked at ebay and the HD 6950s that are flashable are the same price as HD 6970, so you'll go with another HD 6970.
oh thanks for correction sir i think he was asking about hd 6950 flashing.:)