There are no drivers for routers. For a wireless gaming router I'd recomend the D-Link 4300
You will need drivers for the wireless adapter
( just an example), but that is based on OS (XP, XP64, Vista, Vist64) and not CPU.
And a 64 bit CPU doen't mean you need a 64 bit OS. And unless you are an enthusiast, I'd recomend XP at this time.