Socket 479
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| Socket 479 | ||
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| Specifications | ||
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| Type | PGA-ZIF | |
| Chip form factors | Flip-chip pin grid array (FC-PGA2) | |
| Contacts | 479 | |
| Bus Protocol | AGTL+ | |
| FSB | 100 MHz (Quadpumped), FSB400 133 MHz (Quadpumped), FSB533 |
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| Voltage range | ||
| Processors | Intel Pentium M Intel Celeron M VIA C7-M |
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This article is part of the CPU socket series |
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Socket 479 is the CPU socket for the Intel Pentium M and Celeron M, mobile processors normally used in laptops, as well as Tualatin-M Pentium III processors. The official naming by Intel is mFCPGA and mPGA479M. Despite the 479 in the name the Pentium M Processors for this socket use only 478 Pins.
It uses a different electrical pin-arrangement from socket 478, making it impossible to use a Pentium M in a normal 478 board, but yet the Pentium M fits mechanically in a Socket 478. For this reason Asus makes a drop-in board (CT-479) which lets you use socket 479 processors in selected Asus boards[1]. Currently, the only chipsets for the Pentium M are the Intel 855GM/GME/PM, Intel 915GM/GMS/PM and Intel 6300ESB. While the Intel 855GME chipset supports all Pentium M CPU's, the Intel 855GM chipset does not support 90nm 2MB L2 cache (Dothan core) models[2].
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| Asus CT-479 adapter | A comparison of the Dothan (Pentium M SL7SM) (left) and Yonah (Core Duo) (right). Both chips have 478 pins, but the placement of one pin has been changed. |
Recently, Intel has released a new socket 479 with a revised pinout for its Core processor, called Socket M. This socket has the placement of one pin changed from the original Socket 479 in order to make the different processors incompatible in the incorrect socket. Socket M supports a 667 MT/s front side bus with the Intel 945GM chipset.
