This myth that Windows x32 does not use 4GB is just that.. a myth
The OS does in fact address up to a max of 4GB regardless of what the Task Manager readout displays - part of that is an error in how Windows x32 works
The internet is full of horse manure
The primary issue is not the OS but the program in use. It must be LARGE ADDRESS AWARE or >2GB aware
The 2nd issue is the address space problem created by software that wants more the 2GB and the size of the PCIe video memory which must be mapped or addressed with the OS. Physical memory and Virtual Address Space are 2 different things and what causes out of memory errors has NOTHING to do with >2GB in Windows x32.. OOM means OUT OF address space mapped MEMORY
It is advisable to use a 64bit OS with a >2GB aware program such as FSX-SP2 simply because of todays video cards and how much they impact the default address space and squeeze the OS
I explain the entire process for working out OOM issue with Vista/XP 32 in the FSX tuning threads. Those who do not see OOM issues do not need to mess with any of that and if they are on FSX SP2 (SP1 is not >2GB aware) and using 4GB they will
Motherboard companies place the 4GB warning in their manuals in order to circomvent the flood of support contacts they got at one time about the memory use counter not showing their memory in use. What they put in those manuals is very misleading
I do agree anyone using the better video cards are FAR better off on a 64bit OS even if they only use 2GB! The user will avoid more headaches (that may or may not show up) that way. But I really wish people would learn how memory works with 32bit OS's and stop posting the myths as it would make my job a lot eaiser
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