Memory usage on 64-bit OS

[alcattle]

to OP:right but also wrong,
The only software controlling amount of RAM is the OS. Windows this case. The base 32 - bit OS only sets up 4 gigs of memory locations. From that number, the OS uses some, drivers use more so you end up with 3.5 gigs or so of usable RAM. Programs take memory from that amount.
64 bit OS will allow a huge number of locations, forget the number but more memory then your PC can hold.

[Svpernova09]

At this point in time WoW is not supposed to use more than 2 gigs of RAM per instance. (5x WoWs max would ever use 10 gigs)

http://forums.worldofwarcraft.com/th...1#242589026545

We're not enabling the 3 GB switch on World of Warcraft as its memory management system is built to handle keeping things under 2 GB. It may change in a future version but the current one won't. Only StarCraft II has it.