RLM, do mentioned you had blue screens if you changed to 1T, dont you think that already messed your OS installation and might be the cause of the BSoD from the display driver? or probably corruption somewhere else is leading to the bsod you are experiencing.

Im glad to hear you are somewhat progressing through this and not having to mess with the GTLRefs. However, something tells me this might be a a good key for system estability whether we like it or not.
Well I think I've cracked it. Still testing.

It took an increase in volts to the northbridge SPP. Upped to 1.45v 3d mark ran for a minute before garbage and nv4_disp. Upped then to 1.5v and it ran through no problems at 1800mhz 8-8-8-1T.

Wouldn't want 1.5v as a 24/7 and could possibly do with water cooling on the northbridge. Interesting to see this making a difference though.

RLM