a 32-bit operating system can only support 4GB of RAM; 2^32 = 4GB, even if you stick 12GB of memory in the server the OS will only use 4 of it.
Note, unless the application has been built specially, a 32-bit app running on any windows operating system can only use 2GB of virtual memeory (at which point it crashes)
All of the SWO processes are 32-bit applications not specially built.