I assume you are talking about the AGP version.
I agree with what prozac said.
I have a Sapphire X800GTO. It seems that many of them are unlockable to 16-pipes including mine. I have noticed that Newegg recently changed the pictures of the Sapphire model. One has a long red PCB(printed circuit board) and a black fan while the other has a shorter red PCB and a semi transparent fan.
My card is the long one with the black fan. This type is the one that seems to have a high rate of unlockability but low overclockability. The version with the transparent cooler may not unlock, I don't know. However, it may overclock better. Whatever the case, if you need help figuring out what you can do to tweak the card, let me know.