Radeon 9800XT Voltmods

[W1zzard]

Max. safe Voltages
VGPU
Air cooling: 1.8V
Water cooling: 1.95V
Phase change: 2.1V

Overview
http://www.techpowerup.com/articles/102/images/9800xt_small.jpg (http://www.techpowerup.com/articles/102/images/9800xt.jpg)

Mods to solder
http://www.techpowerup.com/articles/102/images/vgpu.jpg

http://www.techpowerup.com/articles/102/images/vdd.jpg

http://www.techpowerup.com/articles/102/images/vmem.jpg

Pencil mods
http://www.techpowerup.com/articles/102/images/vgpupencil.jpg

[Unregistered]

Whats the IGPU and wheres the voltage check piont for that?
Also, what do the vddq and vref do?