I did both the vmem and vddq mods, both with a 50k VR. Pin 5 and pin 7 ( ground ) were used on both mods and it did work :)
The read points work as stated too :D
The strange thing is my ram would not run stable over 470 even with the mods :(
I did notice that AGP voltage ( 1.5-1.8 on the NF7-S Rev2 ) had a direct effect on artifacting. Higher voltage gave less artifacts as you would expect ;)
Just for the hell of it I dropped my AGP down to 4x from 8x and damn if all my problems went away :D :D
I have my ram at 570 now with no problems at all and no volt mods attached !! I have not tested this VGA card on another motherboard so I have no idea if its the board or the VGA card causing the problem.
Out of interest I assume the drop to 4x AGP will give a minimal performance drop if any ? The increased ram speed will easily offset any performance drop I would imagine.
Just thought I would let you guys know my results :) I don't even think I will re-attach my mods now, as 570 is more than enough for me ;)
Cheers