In the green corner, NVIDIA no longer produces the GeForce 6800 Ultra GPU, leaving the GeForce 6800 GT as the highest performing AGP part, though not anywhere as fast as ATI's Radeon X850 XT series. November 2005 saw a brand new GeForce 6800 GS variant and while it was warmly welcomed in the PCI Express market for its 'GeForce 6800 GT'-like performance at an enticing price point, the AGP version didn't quite receive the same salutation. This is because the AGP version was based on the NV40 GPU and clocked at 350/1000, whereas the PCIe version had the NV42 GPU and was clocked at 425/1000. The entry of the GeForce 6800 GS also marked the end of the standard GeForce 6800 and at US$200, the GS is quite a worthy option..



Link: Hardware Zone