Can this run 64-bit os

I will upgrade to 8 gb of ram ddr3 because i need to play latest games.These are are specs.
processor-core 2 duo e7500@2.93ghz
hdd-500gb seagate
ram-2gb currently upgarde to 8 gb in few days
graphic card-nvidia geforce zotac gtx 550ti

can i upgrade to 64-bit os with these specs.THANXXXXXXXXXXX.....in advance,,