You need to be very carefull when reading VGA reviews from GeCube on other websites. GeCube is sending out "fine tuned" boards to media, models that aren't easily found on the market. In our case, we've got from them one Radeon X800 GTO running at 472 MHz for core and 1 GHz for memory, while the original specs for this board is 400 MHz for core and 1 GHz for memory. With this "fine tuning", GeCube Radeon X800 GTO would be faster than a Radeon X800 Pro (475 MHz for core and 950 MHz for memory).
The whole problem is that they didn't tell us that the sample they sent us was overclocked. Officially, GeCube was selling this overclocked model in a "special limited quantity" offer, however this model is already sold out. Also, we couldn't find any reference for the overclocked specs on the box, on the manual or on their website of this model we've got. You can read more over here.