I had the same problem and, in fact, I still have! But now I know the origin: the chipset. My laptop has a 945 Intel chipset which cannot remap the ram. So, even with a 64bits OS I can't use the whole memory, unfortunately.
I had the same problem and, in fact, I still have! But now I know the origin: the chipset. My laptop has a 945 Intel chipset which cannot remap the ram. So, even with a 64bits OS I can't use the whole memory, unfortunately.