While this is easy enough with a hex editor, you cannot simply modify system files without Windows knowing and preventing itself from loading. You must modify the NT kernel itself to change the way it executes. So how can you get rid of this limit? Well, its not a simple registry edit (unfortunately). In fact x86 version of Windows XP and Windows XP SP1 support more than 4GB of memory, with the self imposed limit first occurring in the SP2 update. Not only that, drivers that need to do so are not very common. However, these drivers are few and far between, as Microsoft as not only discouraged this, but I don't believe they will certify a 32 Bit driver if they assume so.
The reason they do this is because some old 32 Bit drivers that directly accessed memory through there physical addresses assumed that the address space space 32 bits (when its actually 36 bits with PAE enabled). So why does Microsoft 32 Bit versions of Vista and 7 only support 4GB of memory? Its not because they don't support the PAE feature of x86 CPU's, but rather because they self impose the limit. This explains why even with 4GB of memory, you usually dont see all of it. Something else you might want to read would be 3GB Barrier. This allows those CPU's supporting that feature to effectively address up to 64GB of total memory. Most modern CPU's (Since the Pentium Pro Era, circa 1995) have included support for the Page Address Extension (PAE). If your wondering why I said "self imposed", its because the 4GB limit is not a limitation of the 32 Bit operating mode on modern x86 CPU's.
#HOW TO CORRECT PONT IN VIBER FOR WINDOWS 10 HOW TO#
The purpose of this article is to demonstrate how to disable the self imposed 4GB memory limit on 32 Bit (x86) versions of Windows Vista and Windows 7.