Is a 64 bit OS better than a 32 bit OS for gaming with the following specs.?

My specs. AMD athlon dual core 2.4 GHZ (4600+), 2 gb of corsair xms2 ddr2 RAM, 500GB sata 2 hdd, ati radeon hd 5450 512 mb gddr3. I am running windows 7 32 bit and i want to switch over to 64 bit and i was wondering if it will make my gaming experience better or worse.