7770 performs better iirc.. a 650ti boost on the other hand will outperfom it but all of the mentioned cards are out of his budget.
You sure? I thought it was 7770 < GTX 650 TI < 7850.
I notice that although its a OME card its clocked the same as the retail card....
unlike the the gtx 560ti OME which is clocked down allot
Top marks for bargain spotting
Edit at 244 watts power draw make srue your PSU is up to it