Socket 479
Encyclopedia
Socket 479 is the CPU socket
for the Intel Pentium M
and Celeron M, mobile processor
s. Normally used in laptops, but has also been used with Tualatin-M Pentium III
processors. The official naming by Intel is µFCPGA and µPGA479M. Despite the fact that Socket 479 has 479 pin holes, the Pentium M Processors for this socket have only 478 pins.
There existed three electrically incompatible, but physically identical, versions of this socket:
. The Socket 479 has a different electrical pin-arrangement from Socket 478
, making it impossible to use a Pentium M in a normal 478 board although the Pentium M fits mechanically in a Socket 478. For this reason manufacturers like Asus
have made drop-in boards (e.g. CT-479) which let you use Socket 479 processors.
Chipset
s which employ this socket for the Pentium M are the Intel 855GM/GME/PM and Intel 915GM/GMS/PM. While the Intel 855GME chipset supports all Pentium M CPU's, the Intel 855GM chipset does not officially support 90 nm 2MB L2 cache (Dothan core) models (even though it works, it only works at 400FSB, some 3rd party/user was able to overclock the FSB on 855GM/GME/PM to support 533FSB Dothan Core)... The other difference is the 855GM chipset graphics core runs at 200 MHz while the 855GME is runs at 250 MHz.
In 2006, Intel released the successor to Socket 479 with a revised pinout for its Core
processor, called Socket M
. This socket has the placement of one pin changed from the Pentium M version of Socket 479; Socket M processors will physically fit into a Socket 479, but are electrically incompatible with most versions of the socket. Socket M supports a 667 MT/s FSB with the Intel 945PM/945GM chipsets.
CPU socket
A CPU socket or CPU slot is a mechanical component that provides mechanical and electrical connections between a microprocessor and a printed circuit board . This allows the CPU to be replaced without soldering....
for the Intel Pentium M
Pentium M
The Pentium M brand refers to a family of mobile single-core x86 microprocessors introduced in March 2003 , and forming a part of the Intel Carmel notebook platform under the then new Centrino brand...
and Celeron M, mobile processor
Mobile processor
A mobile processor is a CPU designed to save power. It is found in mobile computers and cellphones.A CPU chip designed for portable computers, it is typically housed in a smaller chip package, but more importantly, in order to run cooler, it uses lower voltages than its desktop counterpart and has...
s. Normally used in laptops, but has also been used with Tualatin-M Pentium III
Pentium III
The Pentium III brand refers to Intel's 32-bit x86 desktop and mobile microprocessors based on the sixth-generation P6 microarchitecture introduced on February 26, 1999. The brand's initial processors were very similar to the earlier Pentium II-branded microprocessors...
processors. The official naming by Intel is µFCPGA and µPGA479M. Despite the fact that Socket 479 has 479 pin holes, the Pentium M Processors for this socket have only 478 pins.
There existed three electrically incompatible, but physically identical, versions of this socket:
- for Pentium III-MPentium IIIThe Pentium III brand refers to Intel's 32-bit x86 desktop and mobile microprocessors based on the sixth-generation P6 microarchitecture introduced on February 26, 1999. The brand's initial processors were very similar to the earlier Pentium II-branded microprocessors...
(released in 2001); - for Pentium MPentium MThe Pentium M brand refers to a family of mobile single-core x86 microprocessors introduced in March 2003 , and forming a part of the Intel Carmel notebook platform under the then new Centrino brand...
and Celeron M 3xx (this was the most common version of the socket, and was released in 2003); and - a version compatible with Socket MSocket MSocket M 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...
for Intel CoreIntel CoreYonah was the code name for Intel's first generation of 65 nm process mobile microprocessors, based on the Banias/Dothan-core Pentium M microarchitecture. SIMD performance has been improved through the addition of SSE3 instructions and improvements to SSE and SSE2 implementations, while integer...
, Core 2 and Celeron M 4xx and 5xx processors.
Technical specifications
This socket is physically similar to, yet different from Socket 478Socket 478
Socket 478 is a 478-contact CPU socket used for Intel's Pentium 4 and Celeron series CPUs.Socket 478 was launched with the Northwood core to compete with AMD's 462-pin Socket A and their Athlon XP processors. Socket 478 was intended to be the replacement for Socket 423, a Willamette-based...
. The Socket 479 has a different electrical pin-arrangement from Socket 478
Socket 478
Socket 478 is a 478-contact CPU socket used for Intel's Pentium 4 and Celeron series CPUs.Socket 478 was launched with the Northwood core to compete with AMD's 462-pin Socket A and their Athlon XP processors. Socket 478 was intended to be the replacement for Socket 423, a Willamette-based...
, making it impossible to use a Pentium M in a normal 478 board although the Pentium M fits mechanically in a Socket 478. For this reason manufacturers like Asus
ASUS
ASUSTeK Computer Incorporated is a multinational computer technology and consumer electronics product manufacturer headquartered in Taipei, Taiwan. Its product range includes motherboards, desktops, laptops, monitors, tablet PCs, servers and mobile phones...
have made drop-in boards (e.g. CT-479) which let you use Socket 479 processors.
Chipset
Chipset
A chipset, PC chipset, or chip set refers to a group of integrated circuits, or chips, that are designed to work together. They are usually marketed as a single product.- Computers :...
s which employ this socket for the Pentium M are the Intel 855GM/GME/PM and Intel 915GM/GMS/PM. While the Intel 855GME chipset supports all Pentium M CPU's, the Intel 855GM chipset does not officially support 90 nm 2MB L2 cache (Dothan core) models (even though it works, it only works at 400FSB, some 3rd party/user was able to overclock the FSB on 855GM/GME/PM to support 533FSB Dothan Core)... The other difference is the 855GM chipset graphics core runs at 200 MHz while the 855GME is runs at 250 MHz.
 |
 |
| 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. |
In 2006, Intel released the successor to Socket 479 with a revised pinout for its Core
Intel Core
Yonah was the code name for Intel's first generation of 65 nm process mobile microprocessors, based on the Banias/Dothan-core Pentium M microarchitecture. SIMD performance has been improved through the addition of SSE3 instructions and improvements to SSE and SSE2 implementations, while integer...
processor, called Socket M
Socket M
Socket M 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...
. This socket has the placement of one pin changed from the Pentium M version of Socket 479; Socket M processors will physically fit into a Socket 479, but are electrically incompatible with most versions of the socket. Socket M supports a 667 MT/s FSB with the Intel 945PM/945GM chipsets.