The CPU must support the Physical Address Extension (PAE), NX bit, and SSE2.

New features not found in the Cortex-A9 include hardware virtualization and 40-bit Large Physical Address Extensions (LPAE) addressing.

Physical Address Extension (PAE) is an alternative to PSE-36 which also allows 36-bit addressing.

"VAXft" stood for "Virtual Address Extension, fault tolerant".

Physical Address Extension or PAE was first added in the Intel Pentium Pro, to allow an additional 4 bits of physical addressing in 32-bit protected mode.

Physical Address Extension (PAE)

As of version 6.4, it officially supports x86 and x86-64 architecture with Physical Address Extension, while a beta is expected to be available for PowerPC.

For example, on 32-bit x86 processors, the Physical Address Extension (PAE) feature is required to access more than 4 GB of RAM.

The physical addresses are 32-bit on the 386, but can be larger on newer processors which support Physical Address Extension.

- Enables Physical Address Extension support.