Radeon X800 Non-Pro/X800 XL/X850 Voltmods

[W1zzard]

This voltmod applies to:

X800 Non-Pro, X800 XL and X850 PCI-Express using PCB #A474
X850 AGP using PCB #A475


The blue Sapphire PCB has the same layout as the red ATI PCB, so it will work on all those models no matter which manufacturer.

Overview
http://www.techpowerup.com/articles/112/images/x800_small.jpg (http://www.techpowerup.com/articles/112/images/x800.jpg)

Mods to solder
http://www.techpowerup.com/articles/112/images/vgpu.jpg
On most cards (like in our picture) there is no resistor installed in the VGPU location.
Solder to both contacts of the empty pad then, otherwise solder to the contacts of the resistor.

http://www.techpowerup.com/articles/112/images/vdd.jpg

http://www.techpowerup.com/articles/112/images/vddq.jpg

Pencil mods
http://www.techpowerup.com/articles/112/images/vgpu_pencil.jpg
If there is no resistor installed (like in our picture) you have to make a pencil bridge between the contacts of the empty solder pad, otherwise draw directly on the resistor.

http://www.techpowerup.com/articles/112/images/vdd_pencil.jpg

http://www.techpowerup.com/articles/112/images/vddq_pencil.jpg

Modifying the VID input of the VGPU controller
http://www.techpowerup.com/articles/112/images/x800vid.jpg
http://www.techpowerup.com/articles/112/images/vidtable.jpg

The picture shows a card with VID code 01101, which is 1.35V.