According to your magical fairy tail you had 64 machines each with 500 GB of ram and each with 8 cores, which you called desktops- a desktop is currently around 16GB of RAM no where close to 500. 64 bit limitation is 18,446,744,073,709,551,616 so if you had 64 TB which is probably only 64 GB it wouldn't matter you would get the whole thing not a magical 32 TB. The current limitation for Linux is 1 TB of RAM. It's 64 GB with a G is probably the truth. and FYI we are getting 200 GB's in one machine so the guy is going through a crap load of work that windows does not natively support.