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Socket M

Type	PGA-ZIF
Chip form factors	Flip-chip pin grid array
Contacts	478 (not to be confused with the previous Socket 479)
FSB frequency	533 MT/s, 667 MT/s, 800MT/s
Processors	Intel Core Solo T1200, T1250, T1300, T1350, T1400, T1500 Intel Core Duo T2050, T2250, T2300, T2300E, T2330, T2350, T2400, T2450, T2500, T2600, T2700 Intel Core 2 Duo T5200, T5300, T5500, T5600, T7200, T7400, T7600, T7600G Intel Pentium Dual-Core T2060, T2080, T2130 Intel Celeron M Intel Celeron 1.66 GHz
Predecessor	Socket 479
Successor	Socket P
This article is part of the CPU socket series

Socket M (mPGA478MT) is a CPU interface introduced by Intel in 2006 for the Intel Core line of mobile processors.

Technical specifications

Socket M is used in all Intel Core products, as well as the Core-derived Dual-Core Xeon codenamed Sossaman. It was also used in the first generation of the mobile version of Intel's Core 2 Duo, specifically, the T5x00 and T7x00 Merom lines (referred to as Napa Refresh), though that line switched to Socket P (Santa Rosa) in 2007. It typically uses the Intel 945PM/945GM chipsets which support up to 667 MHz FSB and the Intel PM965/GM965 which allows 800 MHz FSB support, though the Socket M, PM965/GM965 combination is less common. The "Sossaman" Xeons use the E7520 chipset.

Relation to other sockets

Socket M is pin-compatible with desktop socket mPGA478A but it is not electrically compatible. Socket M is not pin-compatible with the older desktop Socket 478 (mPGA478B) or the newer mobile Socket P (mPGA478MN) by location of one pin; it is also incompatible with most versions of the older mobile Socket 479. Pentium III-M processors designed for the first version of Socket 479 will physically fit into a Socket M, but are electrically incompatible with it. Although conflicting information has been published, no 45 nm Penryn processors have been released for Socket M.

See also

• List of Intel microprocessors

References

1. "PPGA478 Yonah". Intel.com.
2. "PPGA478 Yonah". Intel.com.
3. "PPGA478 Merom". Intel.com.
4. "PPGA478 Sossaman". Intel.com.
5. Smith, Tony (3 Jul 2006). "Intel's multiple Meroms pin-incompatible - report". www.theregister.co.uk. Retrieved 2019-02-12.
6. "Socket 479 (mPGA479M)". CPU-World. Retrieved 2011-09-24.
7. The version of Socket 479 for Intel Core processors was compatible with Socket M; see "Socket 479 (mPGA479M)". CPU-World. Retrieved 2010-01-16.
8. "Socket M (mPGA478MT)". CPU-World. Retrieved 2010-01-16.

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