What is Intel® Extended Memory 64 Technology (Intel® EM64T)?
Intel® Extended Memory 64 Technology (Intel® EM64T) is a technology that enhances server and workstation platforms with 64-bit addressability and related instructions.
Which processors support Intel Extended Memory 64 Technology?
Since Q4 of 2006, all mobile, desktop, and server processors based on the Intel® Core™ Microarchitecture have supported Intel® EM64T.
Which 32- and 64-bit modes are available, and under which conditions? Can I run 32-bit applications on an Intel® Processor using Intel Extended Memory 64 Technology?
|Legacy Mode||Compatibility Mode||64-bit Mode|
|32-bit operating system||64-bit operating system||64-bit operating system|
|32-bit applications||32-bit applications||64-bit applications|
|32-bit drivers||64-bit drivers||64-bit drivers|
|4 GB address space||64-bit flat virtual address space|
|GPRs are 32-bit||GPRs are 64-bit|