![]() | |
Type | LGA |
---|---|
Chip form factors | Flip-chip land grid array |
Contacts | 1156 |
FSB protocol | PCIe 16× (video) + 4× (DMI) + 2 DP (FDI), 2 DDR3 channels |
Processor dimensions | 37.5 × 37.5 mm [1] |
Processors | Nehalem Westmere |
Predecessor | LGA 775 (high-end desktops and low-end servers) LGA 771 (low- and mid-end servers) |
Successor | LGA 1155 |
Memory support | DDR3 |
This article is part of the CPU socket series |
LGA 1156 (land grid array 1156), also known as Socket H [2] [3] or H1, is an Intel desktop CPU socket. Its incompatible successor is LGA 1155.
The last processors supporting it ceased production in 2011.
LGA 1156, along with LGA 1366, were designed to replace LGA 775. Whereas LGA 775 processors connect to a northbridge using the Front Side Bus, LGA 1156 processors integrate the features traditionally located on a northbridge within the processor itself. The LGA 1156 socket allows the following connections to be made from the processor to the rest of the system:
The LGA 1366 platform reached EOL on June 29, 2012. LGA 1156 reached EOL on December 7, 2012. [4]
For LGA 1156 the 4 holes for fastening the heatsink to the motherboard are placed in a square with a lateral length of 75 mm. This configuration was retained for the later, LGA 1155, LGA 1150, LGA 1151, and LGA 1200 sockets meaning that cooling solutions should generally be interchangeable.
μArch | Code name | Brand name | Model (list) | Frequency | Cores/threads | Max. memory speed |
---|---|---|---|---|---|---|
Nehalem (45 nm) | Lynnfield | Core i5 | i5-7xx | 2.66–2.8 GHz | 4/4 | DDR3-1333 |
Core i7 | i7-8xx | 2.8–3.07 GHz | 4/8 | |||
Xeon | L34xx | 1.86 GHz | 4/4 or 4/8 | |||
X34xx | 2.4–3.07 GHz | |||||
Westmere (32 nm) | Clarkdale | Celeron | G1xxx | 2.26 GHz | 2/2 | DDR3-1066 |
Pentium | G6xxx | 2.80 GHz | 2/2 | |||
Core i3 | i3-5xx | 2.93–3.33 GHz | 2/4 | DDR3-1333 | ||
Core i5 | i5-6xx | 3.2–3.6 GHz | 2/4 | |||
Xeon | L34xx | 2.0–2.27 GHz | 2/4 | DDR3-1066 |
All LGA 1156 processors and motherboards made to date are interoperable, making it possible to switch between a Celeron, Pentium, Core i3 or Core i5 with integrated graphics and a Core i5 or Core i7 without graphics. However, using a chip with integrated graphics on a P55 motherboard will (in addition to likely requiring a BIOS update) not allow use of the on-board graphics processor, and likewise, using a chip without integrated graphics on a H55, H57 or Q57 motherboard will not allow use of the motherboard's graphics ports. [5]
The Desktop chipsets that officially support LGA 1156 are Intel's H55, H57, P55, and Q57. Server chipsets supporting the socket are Intel's 3400, 3420 and 3450.
Some small Chinese manufacturers are producing LGA 1156 motherboards based on H61 chipset, and ASRock, for very short time, produced LGA 1156 motherboard based on P67 chipset, the P67 Transformer. It exclusively supports Lynnfield processors and was discontinued after B2 revision of 6 series chipsets was recalled, not receiving a version with B3 revision of P67 chipset.
Name [6] | H55 | P55 | H57 | Q57 |
---|---|---|---|---|
Overclocking | Yes | No | ||
Allows using built-in GPU with Intel Clear Video Technology | Yes | No | Yes | |
Maximum USB 2.0 ports [lower-alpha 1] | 12 | 14 | ||
Maximum SATA 2.0/3.0 ports | 6 | |||
PATA (IDE) [lower-alpha 2] | No | |||
Main PCIe configuration | 1 × PCIe 2.0 ×16 | |||
Secondary PCIe | 6 × PCIe 2.0 ×1 | 8 × PCIe 2.0 ×1 | ||
Conventional PCI support | Yes | |||
Intel Rapid Storage Technology (RAID) | ? | |||
Smart Response Technology | ? | |||
Intel VT-d, Active Management, Trusted Execution, Anti-Theft, and vPro Technology | No | Yes | ||
Release date | Q1'10 | Q3'09 | Q1'10 | |
Maximum TDP | 45 W | |||
Chipset lithography | 65,45&32 nm |
The land grid array (LGA) is a type of surface-mount packaging for integrated circuits (ICs) that is notable for having the pins on the socket — as opposed to pins on the integrated circuit, known as a pin grid array (PGA). An LGA can be electrically connected to a printed circuit board (PCB) either by the use of a socket or by soldering directly to the board.
LGA 775, also known as Socket T, is an Intel desktop CPU socket. Unlike PGA CPU sockets, such as its predecessor Socket 478, LGA 775 has no socket holes; instead, it has 775 protruding pins which touch contact points on the underside of the processor (CPU).
Sandy Bridge is the codename for Intel's 32 nm microarchitecture used in the second generation of the Intel Core processors. The Sandy Bridge microarchitecture is the successor to Nehalem and Westmere microarchitecture. Intel demonstrated an A1 stepping Sandy Bridge processor in 2009 during Intel Developer Forum (IDF), and released first products based on the architecture in January 2011 under the Core brand.
In computing, Direct Media Interface (DMI) is Intel's proprietary link between the northbridge and southbridge chipset on a computer motherboard. It was first used between the 9xx chipsets and the ICH6, released in 2004. Previous Intel chipsets had used the Intel Hub Architecture to perform the same function, and server chipsets use a similar interface called Enterprise Southbridge Interface (ESI). While the "DMI" name dates back to ICH6, Intel mandates specific combinations of compatible devices, so the presence of a DMI does not guarantee by itself that a particular northbridge–southbridge combination is allowed.
The Platform Controller Hub (PCH) is a family of Intel's single-chip chipsets, first introduced in 2009. It is the successor to the Intel Hub Architecture, which used two chips–a northbridge and southbridge, and first appeared in the Intel 5 Series.
LGA 1366, also known as Socket B, is an Intel CPU socket. This socket supersedes Intel's LGA 775 in the high-end and performance desktop segments. It also replaces the server-oriented LGA 771 in the entry level and is superseded itself by LGA 2011. This socket has 1,366 protruding pins which touch contact points on the underside of the processor (CPU) and accesses up to three channels of DDR3 memory via the processor's internal memory controller.
Haswell is the codename for a processor microarchitecture developed by Intel as the "fourth-generation core" successor to the Ivy Bridge. Intel officially announced CPUs based on this microarchitecture on June 4, 2013, at Computex Taipei 2013, while a working Haswell chip was demonstrated at the 2011 Intel Developer Forum. Haswell was the last generation of Intel processor to have socketed processors on mobile. With Haswell, which uses a 22 nm process, Intel also introduced low-power processors designed for convertible or "hybrid" ultrabooks, designated by the "U" suffix. Haswell began shipping to manufacturers and OEMs in mid-2013, with its desktop chips officially launched in September 2013.
The Intel P55 is the first desktop chipset from Intel based on the PCH chipset design. The P55 Express chipset uses the LGA 1156 socket. Compatible CPUs include the first generation Core i series i3, i5, and i7 processor line along with a Pentium G6950. Like any PCH chipset, the P55 uses a Direct Media Interface connection.
Lynnfield is the code name for a quad-core processor from Intel released in September 2009. It was sold in varying configurations as Core i5-7xx, Core i7-8xx or Xeon X34xx. Lynnfield uses the Nehalem microarchitecture and replaces the earlier Penryn based Wolfdale and Yorkfield processors, using the same 45 nm process technology, but with a new memory and bus interface. The product code for Lynnfield is 80605, its CPUID value identifies it as family 6, model 30 (0106Ex).
Intel Core is a line of multi-core central processing units (CPUs) for midrange, embedded, workstation, high-end and enthusiast computer markets marketed by Intel Corporation. These processors displaced the existing mid- to high-end Pentium processors at the time of their introduction, moving the Pentium to the entry level. Identical or more capable versions of Core processors are also sold as Xeon processors for the server and workstation markets.
FDI or Flexible Display Interface is an interconnect created by Intel in order to allow the communication of the HD Graphics integrated GPU found on supported CPUs with the PCH southbridge where display connectors are attached. It provides a path between an Intel processor and an Intel southbridge on a computer motherboard which carries display data from the graphics controller of the Intel processor package to the display connectors attached at some PCH versions. It is based on DisplayPort standard. Currently it supports 2 independent 4-bit fixed frequency links/channels/pipes at 2.7 Gbit/s data rate. It was first used with the 2010 Core i3, i5 processors and H55, H57, Q57, 3450 southbridges released in 2010. FDI enabled processors require FDI enabled southbridge in order to utilize the graphics controller capability, thus boards based on P55, PM55, and P67 will not be able to take advantage of the graphics controller present on later processors. An FDI capable southbridge and CPU pair is not usable without the existence of the appropriate video connectors on the mainboard.
LGA 1155, also called Socket H2, is a zero insertion force flip-chip land grid array (LGA) CPU socket designed by Intel for their CPUs based on the Sandy Bridge and Ivy Bridge microarchitectures.
Socket G1, also known as rPGA 988A, is a CPU socket introduced by Intel in 2009 for the mobile variants of the first-generation Intel Core processors. It is the successor to Socket P, and the mobile counterpart to LGA 1156 and LGA 1366.
Broadwell is the fifth generation of the Intel Core processor. It is Intel's codename for the 14 nanometer die shrink of its Haswell microarchitecture. It is a "tick" in Intel's tick–tock principle as the next step in semiconductor fabrication. Like some of the previous tick-tock iterations, Broadwell did not completely replace the full range of CPUs from the previous microarchitecture (Haswell), as there were no low-end desktop CPUs based on Broadwell.
Socket G2, also known as rPGA 988B is Intel's CPU socket used with their line of mobile Core i7, the successor to the Core 2 line, and also with several mobile Core i5 and Core i3 processors. It is based on Intel's Sandy Bridge and Ivy Bridge architecture. Like its predecessor, socket G1 systems, it can only run in dual-channel memory mode, but with data rates up to 1600 MHz. Socket G2 CPUs are also known as FCPGA988 socket processors, which should be pin compatible with PPGA988.
LGA 1151, also known as Socket H4, is a type of zero insertion force flip-chip land grid array (LGA) socket for Intel desktop processors which comes in two distinct versions: the first revision which supports both Intel's Skylake and Kaby Lake CPUs, and the second revision which supports Coffee Lake CPUs exclusively.
Coffee Lake is Intel's codename for its eighth-generation Core microprocessor family, announced on September 25, 2017. It is manufactured using Intel's second 14 nm process node refinement. Desktop Coffee Lake processors introduced i5 and i7 CPUs featuring six cores and Core i3 CPUs with four cores and no hyperthreading.
LGA 1200 is a zero insertion force flip-chip land grid array (LGA) socket, compatible with Intel desktop processors Comet Lake and Rocket Lake (11th-gen) desktop CPUs, which was released in April 2020.