Curiosity on clientFollow

I'm having a few problems as is most with ARR.

A few of which is game hanging in black screen when zoning and cutscenes, even on start up. My comp itself can handle the game well and truly, but i'm looking at the client on my task manager and noticed its a 32bit client running on my 64bit machine.

Please correct me if i'm wrong but wouln't a 32bit client not allocate my full ram for loading data etc as seamless as a 64bit client?

So my question is, is there a 64bit client that i have missed the link somewhere? and also why not if so. FFXI had a 64bit client.