No, look closer: N/A = Not support
The board manufacturer says "GA-945GCMX-S2 (rev. 6.6) is able to boot with Intel® Core™2 Duo supporting FSB 1333MHz (OC)"
The chipset manufacturer does not claim quad support for any 945 or 946 chipset. Your 945GC is actually the only one qualified for 45nm duals, if it's the A2 stepping of the chipset.