Hey I was wondering if someone could give me a hand with something, I recently had a pair of Ocz SLi 2x1gb PC-8500 modules die on me and replaced them with Reaper X 8000 2x2gb and it posted with 3.19gb of ram.

Now i was aware i'd have issues unless using Vista X64 as i currently use Vista X86, but was wondering do i absoultely have to reinstall windows to X64 to get the full 4gb ?