Apparently I've heard stories of people getting the 7850 to 1200 core. Mine is locked at 1050 max though.. This card however at stock is 860. Mine came at 900....I'm at 1000. If in deed I can hit the max without voltage OCing, then great. I'm also at +10 power and 1300 memory.
You need to mod MSI afterburner to get higher OC's
Or use Sapphire Trxixxhttp://forums.guru3d.com/showthread.php?t=327291
I've bumped up mt 7850 to 1.1ghz but no need for that right now @1080p so I'm keeping it at 1ghz, slightly above stock 975mhz