Socket 479 (mPGA479M)

Socket 479, also called mPGA479M, was introduced in 2001 as a socket for mobile Pentium III-M microprocessors, and, eventually, for mobile Celeron processors with Coppermine-T and Tualatin cores. The Pentium III-M CPUs were manufactured 478-pin package, but the socket itself had 479 pin holes, which made it easier for Intel to re-use the socket for other generations of microprocessors. Over the course of the next 5 years Intel introduced two other generations of mobile microprocessors that utilized the same socket, but were not compatible with each other or with Pentium III-M motherboards. Even more, socket 478 (Pentium 4 and mobile Pentium 4) and socket P (Core 2 Duo Mobile) processors could physically fit into socket 479, but were not electrically compatible with it. All these different families were manufactured in three different types of 478-pin package. The packages differed between themselves only by location of one pin, and, having one extra pin hole, it was sufficient for the socket to accommodate all three 478-pin package types. Below is the table that summarizes all families that can fit into the socket mPGA479M, but are not electrically compatible with each other:

CPU families	Microarchitecture	Socket	Notes
Mobile Celeron Pentium III-M	P6	Socket 479 or mPGA478A	Socket mPGA478A is physically the same as socket M
Pentium 4 Mobile Celeron Mobile Pentium 4-M Mobile Pentium 4	NetBurst	mPGA478B (socket 478)	Fits into, but doesn't work in socket 479
Celeron M 300 series Pentium M	Mobile	Socket 479 or mPGA478C	mPGA478C socket was used in small number of Celeron M / Pentium M motherboards
Core Solo Core Duo Celeron M 400 and 500 series Pentium Dual-Core Mobile Core 2 Duo Mobile	Mobile Core	Socket 479 or Socket M	Socket M is physically the same as socket mPGA478A
Celeron M 500 series Mobile Pentium Dual-Core Core 2 Duo Mobile Core 2 Duo Quad Core 2 Duo Extreme	Core	Socket P	Fits into, but doesn't work in socket 479

The socket 479 works with mobile processors with frequencies up to 233 MHz and FSB frequencies up to 667 MHz.

The socket has 479 pin holes arranged as 26 x 26 grid with 14 x 14 section removed from the center of the grid. The socket has 1 corner pin hole plugged. Socket dimensions are 3.6 cm x 4.4 cm or 1.42" x 1.73".

  Supported processors  

All processors in the table below will physically fit into the socket, but not all of them are supported by all motherboards. If you're upgrading an old computer system please make sure that the CPU is compatible with your motherboard. Please see "Upgrading socket 479 motherboards" section below for information on how to determine what microprocessors can be supported by your motherboard.

CPU Family	Frequency	The fastest CPU(s)
Intel Mobile Celeron (Coppermine-T)	733 MHz - 933 MHz	Intel Mobile Celeron 933
Intel Mobile Celeron (Tualatin)	1000 MHz - 1333 MHz	Intel Mobile Celeron 1.33 GHz
Intel Mobile Pentium III-M	866 MHz - 1333 MHz	Mobile Pentium III-M 1333
VIA C7	1500 MHz - 2000 MHz
Intel Celeron M (Banias)	1200 MHz - 1500 MHz	Celeron M 340
Intel Celeron M (Dothan)	1300 MHz - 1700 MHz	Celeron M 390
Intel Pentium M (Banias)	1200 MHz - 1800 MHz	Pentium M 1.8 GHz
Intel Pentium M (Dothan)	1300 MHz - 2260 MHz	Pentium M 780
Intel Core Solo	1500 MHz - 2000 MHz	Core Solo T1500
Intel Core Duo	1600 MHz - 2333 MHz	Core Duo T2700
Intel Celeron M 400 series	1460 MHz - 2000 MHz	Intel Celeron M 450
Intel Celeron M 500 series	1600 MHz - 1733 MHz	Intel Celeron M 530
Intel Pentium Dual-Core Mobile	1600 MHz - 1867 MHz	Intel Pentium Dual-Core Mobile T2130
Intel Core 2 Duo Mobile	1600 MHz - 2333 MHz	Core 2 Duo Mobile T7600 Core 2 Duo Mobile T7600G

There are no AMD processors compatible with this socket.

  Compatible sockets  

Socket mPGA478C (for Celeron M 300 series and Pentium M motherboards)
Socket M (for motherboards supporting Core Solo, Core Duo, Celeron M 400 and 500 series, Pentium Dual-Core Mobile and Core 2 Duo Mobile)

  Compatible package types  

478-pin micro FC-PGA

  Upgrading socket 479 motherboards  

Because it's easy to put electrically-incompatible CPU into the socket 479 and thus damage the CPU and/or the motherboard, it is very important that you verify processor compatibility before buying and installing it. Depending on the type of motherboard you have, your upgrade choices are:

• Mobile Celeron / Pentium III-M motherboard: your best upgrade option is a Mobile Pentium III-M 1333. You cannot upgrade to any other mobile processors.
• Celeron M 300 series or Pentium M:
  • If your motherboard supports 533 MHz FSB then the fastest upgrade option is a Pentium M 780. If the Pentium M 780 seems too expensive or difficult to find then consider upgrading to Pentium 770.
  • If your motherboard supports only 400 MHz FSB then the fastest upgrade option is a Pentium M 765. If the Pentium M 765 seems too expensive or difficult to find then consider upgrading to Pentium 755.
  You cannot upgrade to Core Solo, Core Duo, Celeron M 400 / 500 series, Pentium Dual-Core Mobile or Core 2 Duo Mobile processors.
• Celeron M 400 or 500 series, Core Solo, Core Duo, Pentium Dual-Core Mobile or Core 2 Duo Mobile (all socket M processors):
  • The best upgrade option is a Core 2 Duo Mobile T7600 or T7600G. The T7600G has unlocked clock multiplier and can be overclocked, but it's very difficult to find.
  • If the T7600 / T7600G is too expensive for you then consider upgrading to slower Core 2 Duo Mobile processors.
  • If you motherboard doesn't support Core 2 Duo Mobile CPUs then your best upgrade option is a Core Duo T2700.

To determine what processors are supported you'll need to:

• Determine manufacturer and model of your motherboard,
• Search on manufacturer's website for the motherboard model.

For upgrade information for ABIT, ASRock, ASUS, DFI, ECS, Gigabyte Technology, Jetway, MSI, PC Chips motherboards please check CPU-Upgrade motherboard database.