Defiantly, with the 925 you wouldn't be holding back the 5770, also for the price you paid. Return it. It really isn't worth an open box and especially a C2. Not saying the C2 is terrible. But say I account my 955, it was 160, in my state the tax IS HIGH! its 10% so I'd be getting a 5% ACTUAL reduction. So the price you paid. Not even close to worth it. Return and get an unopened one. Also, just to say my results. I've had great sucess with the C3 stepping. From a C2 550 to a C3 it overclocks much better. In my opinion.