Unlocking pipelines on a PCI Express X850 Pro...

Get ATITool, open it up, hold shift and click on settings, and post what the fuses are. It'll look something like this:

0xFFF7FFF
0xFFFFF9F

Or something like that.

Nah, you won't be able to do it. Just buy an aftermarket cooler and overclock the shit out of it.

Your fuses have to look like this:

CONFIG_DIE_FUSES = 0xFFFFFFFF
CONFIG_SUBSTRATE_FUSES = 0xFFFFFF9F

All F's. Yours looked similar to mine, which is dielocked, so I'm assuming yours is probably dielocked as well. You can always try though, but there's risks involved, such as loosing control of your fan. I'd just keep it like it is, buy an aftermarket cooler for $20, and overclock it as much as you can. You should be able to get a nice overclock out of it.