That's a more than acceptable score mate, be proud of it. The 7800GTX's were really over-rated cards IMO. I splashed down the cash on a pair of the 7800GTX's for SLI just to be sorely dissapointed that I was able to beat the bench scores of them with a pair of watercooled SLI 6800GT's. I think a lot of this was due to bad ForceWare drivers though. Then when I stepped up to the 7900GTO, that was a HUGE jump from the 7800.
Be happy with that score mate
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