The card I have is a real x850xt PE. I have the X800XT reduced rom flashed to it since it was the most stable rom I could find so far. I tried the X850XT reduced rom previously but it had issues with resolution . It was stuck at 1024x768. I couldn't change the resolution then when i cleared the pram. It really messed up.
thats because the Reduced rom is missing the NDRV witch the ATI drivers don't provide for the X850XT. to get it working solder on a 128KB ROM chip to your X850XT PE and flash it with the full sized X850XT ROM (DVI will still be dead tho)