LGA 771
Encyclopedia
LGA 771, also known as Socket J, is a CPU interface introduced by Intel in 2006. It is used in Intel Core microarchitecture based DP-capable server processors, the Dual-Core Xeon
is codenamed Dempsey
, Woodcrest, and Wolfdale
and the Quad-Core processors Clovertown, Harpertown. It is also used for the Core 2 Extreme QX9775.
The new Nehalem-based Xeon processors use LGA 1366 instead.
with 771 contacts. The word "socket" in this instance is a misnomer, as the processor interface has no pin holes. Instead, it has 771 protruding lands which touch contact points on the underside of the microprocessor
.
The "J" in "Socket J" refers to the now-canceled processor codenamed "Jayhawk", which was expected to debut alongside this interface. It is intended as a successor to Socket 604
and takes much of its design from LGA 775.
Xeon
The Xeon is a brand of multiprocessing- or multi-socket-capable x86 microprocessors from Intel Corporation targeted at the non-consumer server, workstation and embedded system markets.-Overview:...
is codenamed Dempsey
Dempsey
-Background:Dempsey is an anglicised form of of Ó Diomasaigh, « descendant of Díomasaigh »; the latter stems from the Irish adjective díomasach « proud ». The family originated in the Kingdom of Uí Failghe.According to John Grenham:...
, Woodcrest, and Wolfdale
Wolfdale (microprocessor)
Wolfdale is the code name for a processor from Intel that is sold in varying configurations as Core 2 Duo, Celeron, Pentium and Xeon. In Intel's Tick-Tock cycle, the 2007/2008 "Tick" was Penryn microarchitecture, the shrink of the Core microarchitecture to 45 nanometers as CPUID model 23...
and the Quad-Core processors Clovertown, Harpertown. It is also used for the Core 2 Extreme QX9775.
The new Nehalem-based Xeon processors use LGA 1366 instead.
Technical specifications
As its name implies, it is a land grid arrayLand grid array
The land grid array is a type of surface-mount packaging for integrated circuits that is notable for having the pins on the socket rather than the integrated circuit...
with 771 contacts. The word "socket" in this instance is a misnomer, as the processor interface has no pin holes. Instead, it has 771 protruding lands which touch contact points on the underside of the microprocessor
Microprocessor
A microprocessor incorporates the functions of a computer's central processing unit on a single integrated circuit, or at most a few integrated circuits. It is a multipurpose, programmable device that accepts digital data as input, processes it according to instructions stored in its memory, and...
.
The "J" in "Socket J" refers to the now-canceled processor codenamed "Jayhawk", which was expected to debut alongside this interface. It is intended as a successor to Socket 604
Socket 604
Socket 604 is a 604 pin microprocessor socket designed to interface an Intel's Xeon processor to the rest of the computer. It provides both an electrical interface as well as physical support. This socket is designed to support a heatsink....
and takes much of its design from LGA 775.