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

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

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