None that I know of. I just got a Built By ATi 256mb AGP X700 Pro too.
So far it has been performing worse than my 128mb Radeon 9000 Pro at stock clocks. Its performance has been miserable. I am thinking I messed something up in terms of drivers so when I get around to it I am going to do a complete reformat and do a clean driver install.
One thing I am concerned about with this card though, is the backside of it. I am not sure if yours is a Built By ATi, but mine has this pink pad on the backside of the GPU with a little rectangle cut out of the middle of it exposing a little bit of the backside of the GPU or something. When the card is running under load at stock clocks tray tools reports it at around 45C, however when I touch this rectangle, it is so hot it burned the rectangle on my finger! Just wondering if yours is this hot too? I don't recommend keeping your finger on it for more than a split second because mine was INSANELY hot.