My bad, can't find anything for a regular GTX650 "golden sample", but it looks to me like it's just a factory overclock, even seems to have the same cooler on it. Most likely the regular bios will work and you can just clock it higher yourself. If it's bricked already it won't hurt to try it.
http://www.techpowerup.com/vgabios/index.php?architecture=NVIDIA&manufacturer=Gainward&model=GTX+650&interface=&memType=&memSize=