![]() PAE is supported by the Pentium Pro, Pentium II, Pentium III, and Pentium 4 processors. WHAT IS VIRTUALBOX PAE PROPAE was first implemented in the Intel Pentium Pro in 1995, although the accompanying chipsets usually lacked support for the required extra address bits. The NX feature is also available in protected mode when these CPUs are running a 32-bit operating system, provided that the operating system enables PAE. WHAT IS VIRTUALBOX PAE CODEIt also uses the topmost bit of the 64-bit page table entry as a no-execute or "NX" bit, indicating that code cannot be executed from the associated page. The page table structure used by x86-64 CPUs when operating in long mode further extends the page table hierarchy to four levels, extending the virtual address space, and uses additional physical address bits at all levels of the page table, extending the physical address space. ![]() WHAT IS VIRTUALBOX PAE 64 BITSIt defines a page table hierarchy of three levels (instead of two), with table entries of 64 bits each instead of 32, allowing these CPUs to directly access a physical address space larger than 4 gigabytes (2 32 bytes). PAE was first introduced by Intel in the Pentium Pro, and later by AMD in the Athlon processor. ![]() Is a memory management feature for the x86 architecture. In computing, Physical Address Extension ( PAE), sometimes referred to as Page Address Extension,
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