It is a limitation of a 32-bit working system. In Home windows, the Home windows reminiscence supervisor is proscribed to a four GB bodily deal with area. Most of that deal with area is stuffed with RAM, however not all of it. Reminiscence-mapped devices (comparable to your video card) will use a few of that bodily deal with area, as will the BIOS ROMs. After all of the non-memory devices have had their say, there will probably be lower than 4GB of deal with area out there for RAM beneath the 4GB bodily deal with boundary. MacOS X Tiger and Leopard are each 64-bit working methods and won’t expertise this drawback. Neither will 64-bit variations of Home windows XP or Vista or Home windows 7.
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(as of May 23,2020 20:55:31 UTC – Particulars)