Hi recently voltmoded my 7800GS using the ISL 6568 datasheet ... I've connected the vid1 and vid2 to ground giving me a 1.55 V for the GPU ...
The overclock is pretty good stable and without artifacts at 570 MHz on the core
The problem is that only NGO drivers fix my black screen no signal to monitor issue ... I only have this issues playing some games ... rthdribl works for hours without artifacts or crashes...
The main ideea is that the overcurrent protection might kick in ... but is this related to software ???
The problem should be in hardware ... The overcurrent is on the ISL chip implemented ...
Strange but NGO works 100% now I'm using it for 20 days or so ...