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What Is Intel® Extended Memory 64 Technology?

Content Type: Product Information & Documentation   |   Article ID: 000005898   |   Last Reviewed: 05/09/2022

Intel® Extended Memory 64 Technology (Intel® EM64T) is a technology that enhances server and workstation platforms with 64-bit addressability and related instructions. Since the last quarter of year 2006, all mobile, desktop, and server processors based on the Intel® Core™ Microarchitecture have supported the Intel® EM64T.

The table below lists 32-bit operating system, applications, and drivers and map it to its corresponding 64-bit mode.

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

 

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This article applies to 89 products.
Intel Atom® Processor C Series Intel Atom® Processor D Series Intel Atom® Processor E Series Intel Atom® Processor N Series Intel Atom® Processor S Series Intel Atom® Processor X Series Intel Atom® Processor Z Series Intel® Pentium® Gold Processor Series Intel® Pentium® Processor 1000 Series Intel® Pentium® Processor 2000 Series Intel® Pentium® Processor 3000 Series Intel® Pentium® Processor 4000 Series Intel® Pentium® Processor D Series Intel® Pentium® Processor G Series Intel® Pentium® Processor J Series Intel® Pentium® Processor N Series Intel® Pentium® Silver Processor Series Intel® Celeron® Processor 1000 Series Intel® Celeron® Processor 2000 Series Intel® Celeron® Processor 3000 Series Intel® Celeron® Processor 4000 Series Intel® Celeron® Processor 5000 Series Intel® Celeron® Processor G Series Intel® Celeron® Processor J Series Intel® Celeron® Processor N Series 2nd Gen Intel® Xeon® Scalable Processors 3rd Gen Intel® Xeon® Scalable Processors Intel® Xeon® E Processor Intel® Xeon® Scalable Processors Intel® Xeon® W Processor Legacy Intel® Xeon® Processors 10th Generation Intel® Core™ i3 Processors 10th Generation Intel® Core™ i5 Processors 10th Generation Intel® Core™ i7 Processors 10th Generation Intel® Core™ i9 Processors 11th Generation Intel® Core™ i3 Processors 11th Generation Intel® Core™ i5 Processors 11th Generation Intel® Core™ i7 Processors 11th Generation Intel® Core™ i9 Processors 12th Generation Intel® Core™ i3 Processors 12th Generation Intel® Core™ i5 Processors 12th Generation Intel® Core™ i7 Processors 12th Generation Intel® Core™ i9 Processors 4th Generation Intel® Core™ i3 Processors 4th Generation Intel® Core™ i5 Processors 4th Generation Intel® Core™ i7 Processors 5th Generation Intel® Core™ M Processors 5th Generation Intel® Core™ i3 Processors 5th Generation Intel® Core™ i5 Processors 5th Generation Intel® Core™ i7 Processors 6th Generation Intel® Core™ i3 Processors 6th Generation Intel® Core™ i5 Processors 6th Generation Intel® Core™ i7 Processors 6th Generation Intel® Core™ m Processors 7th Generation Intel® Core™ i3 Processors 7th Generation Intel® Core™ i5 Processors 7th Generation Intel® Core™ i7 Processors 7th Generation Intel® Core™ m Processors 8th Generation Intel® Core™ i3 Processors 8th Generation Intel® Core™ i5 Processors 8th Generation Intel® Core™ i7 Processors 8th Generation Intel® Core™ i9 Processors 8th Generation Intel® Core™ m Processors 9th Generation Intel® Core™ i3 Processors 9th Generation Intel® Core™ i5 Processors 9th Generation Intel® Core™ i7 Processors 9th Generation Intel® Core™ i9 Processors Intel® Core™ X-series Processors Intel® Itanium® Processor

Discontinued Products

Legacy Intel Atom® Processors Legacy Intel® Pentium® Processor Legacy Intel® Celeron® Processor Intel® Xeon® Processor E3 Family Intel® Xeon® Processor E3 v2 Family Intel® Xeon® Processor E3 v3 Family Intel® Xeon® Processor E3 v4 Family Intel® Xeon® Processor E3 v5 Family Intel® Xeon® Processor E3 v6 Family Intel® Xeon® Processor E5 Family Intel® Xeon® Processor E5 v2 Family Intel® Xeon® Processor E5 v3 Family Intel® Xeon® Processor E5 v4 Family Intel® Xeon® Processor E7 Family Intel® Xeon® Processor E7 v2 Family Intel® Xeon® Processor E7 v3 Family Intel® Xeon® Processor E7 v4 Family Intel® Xeon Phi™ x100 Product Family Intel® Xeon Phi™ x200 Product Family Legacy Intel® Core™ Processors

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