VRM chip on 6950

[tigersty1e]

http://www.techpowerup.com/reviews/HIS/Radeon_HD_6950/images/front.jpg

What is this vrm chip near the bios switch?

What does it control?

 

[ViRGE]

The chip I believe you're referring to is a Coiltronics FP1005R1 inductor. The bit above it (under the thermal pad) would be a MOSFET.

Neither of those components actually "control" anything, rather they're parts of a Voltage Regulation Module as a whole. A separate chip would be the actual controller, but I don't know where that is on the 6950. As for what it's supplying power for, it may be for the DisplayPorts (which carry a small amount of power for adapters), but I can't be 100% sure.