Re: Showing Usable RAM 2.75GB while installed is 4GB
I would have (from the system specs etc) thought that including the integrated GPU's share of RAM there should still be over 3GB left.
Going over all possible components that have onboard RAM and which have it addressed by the system (HDD cache isn't included for example as only the HDD uses it internally, CPU cache is included) I can't myself figure out why there would be so little remaining. There would be L1, l2 CPU cache, any reserved space used for system comms and maybe BIOS shadowing etc, any cache on the network cards and sound. Also anyother add in cards may or may not have RAM that will be prioritised an address space.
I have an image of XP that I use occasionally. With this RIG, even though I have 1GB of graphics RAM to address I still have 3GB to play with. I'm going to image to XP in a minute, so I'll have a look exactly how much RAM I have available for use.
I forgot about the OEM/For System Builders version being just a single DVD of either 32bit or 64bit. Fortunately the OEM product keys will all register either version. If the OP can get hold of the 64bit instalation files then he could use the 64bit version. This is of course a morally grey area , but IMO if you've bought the copy and have a legal key, swapping it for the 64bit version isn't a crime.
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