Gamegpu.ru , the russian gaming/benching site is using piledriver chips on cheapish old 785/790 gigabyte boards. Having said that, their benchmark results are all over the place when it comes to AMD:
You get an FX-8350 beating even intel extremes on Far Cry 3 (which I find hard to believe btw) and then a few months later ,in a similar game,on the same engine ,the same processor can barely get 43fps on average, losing to an i3. I'd say their boards are dying on them.
Even if SR is on AM3+ and your board can support it, odds are you'll be mising on performance-a lot.If you are dead set on getting a steamroller,get a proper mobo too.