wow your gts stuff wasnt very good at all eh?
1800 cas7 needed 2.1v? wow... i have jnl sticks that do 2000 cas7 with 2v... and you know jnl was a step down from gtr/gts
well i have to mention, those were the best sticks out of a few thousand i went through when i worked at cellshock hehehe
but 1800 777... i think more than half of the jnl i worked with could do that, probably 70%... and they only scale up to 1.8-1.9v... so at lower volts too...
have you tried jnl on amd? should work fine, and i think its easier to find than gtr/gts, and probably cheaper too...

i think almost all jnl did 1333 555 with 1.7v iirc, it really didnt like cas6 though iirc...