he's running SLI dude...3dmark05 is barely even effected by the CPU so no that 'basically a FX-57' isn't really true, of course it's going to be ridiculously better than your card...which if 10k is 3x yours, you're saying yours is around 3k? Not possible, the 6600GT gets approx 3k in 3dmark05, so I really doubt your FX5200 would be up with that.
If those 6800GT's were at Ultra specs it should be hitting closer to 11k
of course it's a good score, but I would expect nothing less of SLI