Been working on my 5870 today. 
Things done: 
Soldered 11x 470UF 6.3v Caps onto the phases. 
Removed stock VR at OCP and added 18K fixed VR for OCP mod
Voltage read
GPU Vcore boost ( I'm missing the 50 OhM VR)



 
I'm looking for more hardcore mods! please shoot me a tip if you got one.
 
- Kriz