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LGA 1156

From Wikipedia, the free encyclopedia
Intel desktop CPU socket

LGA 1156
TypeLGA
Chip form factorsFlip-chipland grid array
Contacts1156
FSB protocolPCIe 16× (video) + 4× (DMI) + 2 DP (FDI), 2DDR3 channels
Processor dimensions37.5 × 37.5 mm[1]
ProcessorsNehalem
Westmere
PredecessorLGA 775 (high-end desktops and low-end servers)
LGA 771 (low- and mid-end servers)
SuccessorLGA 1155
Memory supportDDR3

This article is part of theCPU socket series

LGA 1156 (land grid array 1156), also known asSocket H[2][3] orH1, is anIntel desktopCPU socket. The last processors supporting the LGA 1156 ceased production in 2011. It was succeeded by the mutually incompatible socketLGA 1155.

LGA 1156, along withLGA 1366, were designed to replaceLGA 775. Whereas LGA 775 processors connect to anorthbridge using theFront 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:

  • PCI-Express 2.0 ×16 for communication with a graphics card. Some processors allow this connection to be divided into two ×8 lanes to connect two graphics cards. Some motherboard manufacturers useNvidia's NF200 chip to allow even more graphics cards to be used.
  • DMI for communication with thePlatform Controller Hub (PCH). This consists of a PCI-Express 2.0 ×4 connection.
  • FDI for communication with thePCH. This consists of twoDisplayPort connections.
  • Two memory channels for communication with DDR3 SDRAM. The clock speed of the memory that is supported will depend on the processor.

The LGA 1366 platform reached EOL on June 29, 2012. LGA 1156 reached EOL on December 7, 2012.[4]

Heatsink

[edit]

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, andLGA 1200 sockets meaning that cooling solutions should generally be interchangeable.

Supported processors

[edit]
μArchCode nameBrand nameModel (list)FrequencyCores/threadsMax. memory speed
Nehalem
(45 nm)
LynnfieldCore i5i5-7xx2.66–2.8 GHz4/4DDR3-1333
Core i7i7-8xx2.8–3.07 GHz4/8
XeonL34xx1.86 GHz4/4 or 4/8
X34xx2.4–3.07 GHz
Westmere
(32 nm)
ClarkdaleCeleronG1xxx2.26 GHz2/2DDR3-1066
PentiumG6xxx2.80 GHz2/2
Core i3i3-5xx2.93–3.33 GHz2/4DDR3-1333
Core i5i5-6xx3.2–3.6 GHz2/4
XeonL34xx2.0–2.27 GHz2/4DDR3-1066

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]

Supported chipsets

[edit]
Main article:Intel 5 Series

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, andASRock, for very short time, produced LGA 1156 motherboard based on P67 chipset, the P67 Transformer. It exclusively supportsLynnfield processors and was discontinued after B2 revision of 6 series chipsets wasrecalled, not receiving a version with B3 revision of P67 chipset.

Name[6]H55P55H57Q57
OverclockingYesNo
Allows usingbuilt-in GPU with Intel Clear Video TechnologyYesNoYes
MaximumUSB 2.0 ports[a]1214
MaximumSATA 2.0/3.0 ports6
PATA (IDE)[b]No
MainPCIe configuration1 × PCIe 2.0 ×16
SecondaryPCIe6 × PCIe 2.0 ×18 × PCIe 2.0 ×1
Conventional PCI supportYes
Intel Rapid Storage Technology (RAID)?
Smart Response Technology?
IntelVT-d,Active Management,Trusted Execution, Anti-Theft, andvPro TechnologyNoYes
Release dateQ1'10Q3'09Q1'10
Maximum TDP45 W
Chipset lithography65,45&32 nm

See also

[edit]

Notes

[edit]
  1. ^USB 3.0 is not supported by any of these chipsets. Motherboard manufacturers may use external hardware to add USB 3.0 support.
  2. ^PATA (IDE) is no longer supported in Series 5, but most motherboard manufacturers chose to include support through the addition of third-party IDE controller.

References

[edit]
  1. ^"Intel Core i5/i7 Datasheet"(PDF).
  2. ^Socket Transition Guidance
  3. ^Intel Core i7 & i5 Compatibility SheetArchived December 2, 2010, at theWayback Machine
  4. ^"Intel pulls the plug on several LGA 1366 and 1156 CPUs".Tech2. December 10, 2011. RetrievedFebruary 10, 2023.
  5. ^"Intel's Core i3 and i5 dual-core processors". January 4, 2010.
  6. ^"ARK - Compare Intel Products".Intel ARK (Product Specs).

External links

[edit]
Desktop sockets
Slot
PGA
  • 370 (1998–2001)
  • 423 (W 2000–2001)
  • 478 (N 2001–2004)
LGA
Mobile sockets
Server sockets
Xeon processors
Slot
PGA
  • 603 (2001–2004)
  • 604 (2002–2007)
LGA
Itanium processors
Pre-Pentium IIPGA Sockets
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