Should Video Engine be running 32bit in 64bit?

Hi guys, just curious, i’m running a 64bit OS (windows 7) and 64bit version of Nuendo, however the videoengine portion of Nuendo is running as 32bit Videopreload.exe, Videooutput.exe and wideoengine.exe. Is that what its suppose to do or run 64bit? I sometimes need to have multiple video running in a session for Video game projects and I do run out of video memory. I can go to about 1.7 gigs before a crash. I tried implementing the 2gig limit fix that I learned from running a 32bit OS in the past without avail. Thanks for your help