x86 has four protection rings, of which commonly only 2 are used (with the honourable excelption of the horrific and weird IOPL DLLs in OS/2 that run at ring 2). x64 has less rings and operates a little differently
x86 has four protection rings, of which commonly only 2 are used (with the honourable excelption of the horrific and weird IOPL DLLs in OS/2 that run at ring 2). x64 has less rings and operates a little differently