Can anyone tell me why when I load Flight Simulator X steam edition it only accesses 4 of the 8 Gigs of ram?
FSX is a native 32bit application and therefore can't use more than 4 GBytes of RAM.
The limit comes from the addressing space (32 bit --> 2^32 = 4 294 967 296 bytes of address space, or 4 Gbytes).
However, your RAM is not wasted. The OS can make good use of it, giving 4 Gbytes to FSX alone, and using what is left (a lot!) for housekeeping and other applications.
i hope this helps you
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