Ok, I'm lost?
I have a X800 gt R423 ( says x800se on chip ). I can get the core from 425 stock, to 575 and the Mem from 350 to 400. It has DDR1 with hynix 2.8ns memory.
I install atitool and it showed I had 16p unlocked. I rebooted and now I have 8? Sreen shots are included, I've not changed...