ATHLONType	PGA-ZIF
Chip form factors	OPGA
Contacts	754
FSB frequency	200 MHz System clock 800 MHz HyperTransport
Voltage range	Voltage range 0.8 - 1.55 V Socket 754 was the original socket for AMD's Athlon 64 desktop processors. Due to the introduction of newer socket layouts (i.e. Socket 939, Socket 940 and Socket AM2), Socket 754 has become the more "budget-minded" socket for use with AMD Athlon 64 or Sempron processors. In comparison, it differs from Socket 939 in several areas: support for a single channel memory controller (64-bits wide) with maximum of 3 DIMMs (no dual channel support) lower HyperTransport speed (800 MHz Bi-Directional, 16 bit data path, up and downstream) lower effective data bandwidth (9.6 GB/s) lower motherboard manufacturing costs Although AMD has promoted Socket 754 as a budget platform on the desktop and encouraged mid and high end users to use newer platforms, Socket 754 remained for some time as AMD's high end solution for mobile applications, (e.g. the HP zv6000 series). However, Socket S1 has been released and is slated to supersede Socket 754 in the mobile CPU segment through its support for dual core CPUs and DDR2 SDRAM. Type PGA-ZIF Chip form factors OPGA Contacts 939 FSB frequency 200 MHz System clock 1000 MHz HyperTransport link Voltage range 0.8 - 1.55 v Socket 939 processors and motherboards became available in June 2004, and were superseded by Socket AM2 in May 2006. AMD has ceased the production of this socket to focus on current and future platforms. However, at least one new Socket 939 motherboard has been produced utilizing a modern AMD chipset since AMD transitioned to Socket AM2. In 2009 motherboard maker ASRock released a new Socket 939 motherboard. The motherboard utilizes the AMD 785G IGP chipset and a SB710 southbridge.[1] Both single and dual-core processors were manufactured for this socket under the Athlon 64, Athlon 64 FX, Athlon 64 X2, Sempron and Opteron names. The Opteron 185 and Athlon 64 FX-60, both featuring a 2.6 GHz clock speed and 1 MB of Level 2 cache per core, were the fastest dual-core processors manufactured for this socket. The FX-57 ran slightly faster at 2.8 GHz, making it the fastest single core processor supporting the socket 939 interface.[2] [edit] Technical specifications It supports dual channel DDR SDRAM memory, with 6.4 GB/s memory bandwidth. Socket 939 processors support 3DNow!, SSE2, and SSE3 (revision E or later) instruction sets. It has one HyperTransport link of 16 bit width that can run as fast as 2000 MT/s. In regards to video expansion slots, Socket 939 systems can be found with both AGP slots and PCI-E x16 slots as well. Processors using this socket have 64KB each Level 1 instruction and data caches, and either 256KB, 512KB or 1 MB Level 2 cache.