I used a 1k ohm multiturn pot, working great, I soldered the legs straight to the two points shown in the first pic in this article...
I just bent the pin going to the voltage controller 90° so it has clear space over the other components...
I pretinned the end of the trimpot wires, attached double sided tape to the trimpot and positioned it as I wanted, then I pretinned the solder iron and just heated the trimpots wires so I melted the solder I had already pretinned indirectly, it worked great...
Card isn't the best overclocker tho, I got it up to 800Mhz on stock voltage, after the voltmod I arrived at 870Mhz Core / 2125Mhz Shader and 1075Mhz memory for a stable overclock at 1.30v idle (1.35v load), I got as far as 890Mhz on 1.40v idle but it was not artefact free, and for 900Mhz I required 1.50v idle but that was not stable at all, all screen became garbaged after a few seconds, it didn't even work reliably at 870Mhz at this voltage... (Cooling is by EK Waterblocks EK-FC88 GT/GTS (G92))
I bought the pot at Elfa Sweden, it's article number is 64-712-39 but 64-722-03 would probably be a better choice because it's 500ohm... (Yes, even with a 22 turn pot the voltage goes up a bit too quick when you near 1.5v if using a 1k ohm pot...)
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