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 195.50, Catalyst CCC 9.11 Vista 32 SP1

Futuremark Tests

3DMark Vantage Extreme reports that Sapphire HD 5970 OC is a so far unprecedentedly fast dual-GPU card which is 26% faster than the previous "performance king" – the GTX 295. Even the single-GPU HD 5870 card with a score of 8300 comes close to the GTX 295, and it ran faster than HD 4870 X2.