ATI X800 GTO and GTO2 to X850 XT Mod
 

Sapphire and Connect3D X800 GTO cards can be turned into X850XT cards with a bit of trickery it seems!

The performance increase from stock to modded and overclocked is about 30% in all benchmarks. Final performance is the same as a regular X850 XT PE. Quite impressive for a $220 video card and a 100% mod success rate.

http://www.techpowerup.com/articles/...ng/vidcard/127