Intel 64 Implementations
The first processor to implement Intel 64 was the multi-socket processor Xeon code-named Nocona in June 2004. In contrast, the initial Prescott chips (February 2004) did not enable this feature. Intel subsequently began selling Intel 64-enabled Pentium 4s using the E0 revision of the Prescott core, being sold on the OEM market as the Pentium 4, model F. The E0 revision also adds eXecute Disable (XD) (Intel's name for the NX bit) to Intel 64, and has been included in then current Xeon code-named Irwindale. Intel's official launch of Intel 64 (under the name EM64T at that time) in mainstream desktop processors was the N0 Stepping Prescott-2M. All 9xx, 8xx, 6xx, 5x9, 5x6, 5x1, 3x6, and 3x1 series CPUs have Intel 64 enabled, as do the Core 2 CPUs, as will future Intel CPUs for workstations or servers. Intel 64 is also present in the last members of the Celeron D line.
The first Intel mobile processor implementing Intel 64 is the Merom version of the Core 2 processor, which was released on 27 July 2006. None of Intel's earlier notebook CPUs (Core Duo, Pentium M, Celeron M, Mobile Pentium 4) implements Intel 64.
The following processors implement the Intel 64 architecture:
- Intel NetBurst microarchitecture
- Intel Xeon (all models since "Nocona")
- Intel Celeron (some models since "Prescott")
- Intel Pentium 4 (some models since "Prescott")
- Intel Pentium D
- Intel Pentium Extreme Edition
- Intel Core microarchitecture
- Intel Xeon (all models since "Woodcrest")
- Intel Core 2 (including Mobile processors since "Merom")
- Intel Pentium Dual-Core (E2140, E2160, E2180, E2200, E2220, E5200, E5300, E5400, E6300, E6500, T2310, T2330, T2370, T2390, T3200 and T3400)
- Intel Celeron (Celeron 4x0; Celeron M 5xx; E3200, E3300, E3400)
- Intel Atom microarchitecture
- Intel Atom 200 series (not to be confused with the N200 series, widely used in netbooks)
- Intel Atom 300 series
- Intel Atom N4xx, N5xx series
- Intel Atom Dxxx series
- Intel Nehalem, Sandy Bridge and Ivy Bridge microarchitectures
- Intel Core i3
- Intel Core i5
- Intel Core i7