Of course at Guru3D.com we always think ahead and therefore pulled some numbers for you to compare with. The hardware being used:

Mainboard

Gigabyte GA-K8NXP-SLI motherboard, nForce4 SLI, Socket 939

Processor

AMD Athlon 64 FX-57, Socket 939

Graphics Cards

Radeon X800 GTO (PCX) 256 MB
Radeon X850 XT (PCX) 256 MB
Radeon X1600 XT (PCX) 256 MB
Radeon X1800 XL (PCX) 256 MB
Radeon X1800 XT (PCX) 512 MB

GeForce 6800 (PCX) 128 MB
GeForce 6600 GT (PCX) 128 MB
GeForce 6800 GT (PCX) 256 MB
GeForce 6800 GT (PCX) 256 MB SLI
GeForce 7800 GTX 256 MB
GeForce 7800 GTX 512 MB

Memory

2048 MB (2x1024MB) DDR1 - PC-3200 2-3-3-6

Software

Windows XP Professional SP2
NVIDIA nForce4 Platform Driver 6.39
DirectX 9.0c End User Runtime
ForceWare 81.85 WHQL
Catalyst 5.12
RivaTuner 2.0 (tweak utility)

The tests are being done at default 3DMark06 settings. That's already heavy enough on the hardware ;)