Testbed

Motherboard: MSI P45D3 Platinum ( Provided by: MSI );
Processor: Intel Core 2 QX9770 Extreme edition at 3.6GHz ( Provided by: Intel );
Memory: Corsair Dominator 12800 7-7-7-24 ( Provided by: Corsair);
HDD: WD VelociRaptor 300G 10,000RPM ( Provided by: SmoothCreation );
Driver:  ForceWare 191.07, Catalyst CCC 9.9 Vista 32 SP1

Futuremark Tests

Synthetic Futuremark tests seem to like Mushkin's overclock on the HD 4850 OC. Mushkin's higher clocks have helped the card to the higher scores and it beats the reference HD 4850 by 11%. Furthermore, although the HD 5750 has been introduced a few weeks ago in the new 5000 generation and is supposed to succeed the HD 4850, Mushkin manages to outrun it by up to 8%. Of course, such a comparison isn't telling the whole story as the new generation of cards comes with DX11.