Well, I tried this mod a while ago and failed miserably. I have plenty of resistors but do not have the skill or equipment to perform the modification.

Currently I do not have the resistor in the old or new position. After popping it off, I was unable to solder it back on.

Anyways, on my UD4P, my first PCI-E x16 slot is dead as well as the orange x4 slot right above it. When powering on my rig with either of my 4890's in the first x16 slot, the computer turns all the way on, but the monitor never shows any video. However, the second x16 as well as the third, full length x8 slot all work flawlessly.

If I was to have someone finish this modification for me and solder the resistor into the new space (marked with green on HiCookie's image), would the functionality of the first PCI-E slot return?

I've been afraid to clock my 920 back up there because I don't want to break the board any more than it already is. I took enough of a gamble running it without the resistor in the first place.