Actually I have gt an EP31-DS3L a few days back and was fighting with it to get to 3.6Ghz stable on my Q6600 and the huge vdroop was a big downer

Now bumped into the OC forums thread and found that no solution is yet available for the ISL 6334 based EP35-DS3L and EP31-DS3L....looked into the mod pics of the vanilla P35-DS3L and the usual spec sheets of the ISL 6312 (old) and ISL 6334(new).Had some high resolution shots of my mobo , and so figured out the pencil mod ....I knew it could be hit and miss but still went on and tried it. Bingo and I was 100% correct on finding the correct resistor and its working 100%

Here the pic and explanation of the mod



About the Results here it is :

Q6600 @ 3.6Ghz
Pre Pencil mod :

Bios --- 1.5375 V
Idle --- 1.49V
Load(OCCT 4 cores) --- 1.42V

Post Pencil mod

Bios --- 1.48 V
Idle --- 1.44V
Load(OCCT 4 cores) --- 1.41V

Hope this helps

Oh and ya thnx to all the blokes@OCforums for the original P35-DS3L mod w/o which this wouldn't have been possible

Thanks,
Supra/Regenade