Won't start at all!

[plutomaniac]

As Rom said, x86 operating systems can assign a maximum of 2GB per application even if the whole OS can utilize more. There are some executable tricks to assign a little more but that's irrelevant to the issue here. The real issue here is that the SOMA executable is a native x64 application so it cannot run under x86 operating systems. Thus the "This app can't run on your pc" error message.