At the time these boards were released they thought they would handle the 65nm Quads. Well, when Intel released the Quads then all **** broke loose because changes by Intel caused the boards to not support the new 65nm Quads. That's why NVIDIA had to go and reqork the board to allow support for the Quads. This same problem reared it's head again on the release of the 45nm Quads. The A1 then ended up not meeting voltage and noise requirements so now that A1 which support 65nm Quads do not support 45nm Quads. The AR board does not support either.