LGA 1155

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LGA 1155
Intel Socket 1155.jpeg
TypeLGA
Contacts1155
Processor dimensions37.5mm × 37.5mm[1]
ProcessorsSandy Bridge, Ivy Bridge
PredecessorLGA 1156
SuccessorLGA 1150

This article is part of the CPU socket series
 
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LGA 1155
Intel Socket 1155.jpeg
TypeLGA
Contacts1155
Processor dimensions37.5mm × 37.5mm[1]
ProcessorsSandy Bridge, Ivy Bridge
PredecessorLGA 1156
SuccessorLGA 1150

This article is part of the CPU socket series
View of the socket LGA 1155 on an Intel Core i7 Sandy Bridge 2600K model CPU

LGA 1155, also called Socket H2, is an Intel microprocessor compatible socket which supports Intel Sandy Bridge and Ivy Bridge microprocessors.

Its incompatible high-performance counterpart for Intel desktops and servers is the LGA 2011.

LGA 1155 is designed as a replacement for the LGA 1156 (known as Socket H). LGA 1155 has 1155 protruding pins to make contact with the pads on the processor. Processors of LGA 1155 and LGA 1156 sockets are not compatible with each other since they have different socket notches. However, cooling systems are compatible between both LGA 1155 and LGA 1156 sockets, as the processor has the same dimensions, profile and construction, and similar heat production.[2]

Integrated USB 3.0 support is present in the Z75, Z77, H77, Q75, Q77 and B75 chipsets intended for Ivy Bridge CPUs. Refer to list of Intel chipsets for the complete list of socket 1155 chipsets.

LGA 1150 has succeeded LGA 1155.

Original Sandy Bridge chipsets[edit]

Sandy Bridge chipsets, except Q65, Q67 and B65, support both Sandy Bridge and Ivy Bridge CPUs through a BIOS upgrade.[3] Sandy Bridge based processors officially support up to DDR3-1333 memory, however in practice speeds up to DDR3-2133 have been tested to work successfully.[4]

The H61 chipset only supports one double-sided DIMM per memory-channel and therefore is limited to 16 GB instead of the 32 GB like the others support.[5] On motherboards with four DIMM slots, only four single-sided DIMMs can be installed.[6]

NameB65H61Q67H67[7]P67Z68[8]
OverclockingGPUCPU + RAMCPU + GPU + RAM
Allows using built-in GPU with Intel Clear Video TechnologyYesNoYes
Maximum USB 2.0 ports1121014
Maximum SATA 2.0/3.0 ports4 / 14 / 04 / 2
Main PCIe Configuration1 × PCIe 2.0 ×161 × PCIe 2.0 ×16
or 2 × PCIe 2.0 ×8
Secondary PCIe8 × PCIe 2.06 × PCIe 2.08 x PCIe 2.0
Conventional PCI support2YesNoYesNo
Intel Rapid Storage Technology (RAID)NoYes
Smart Response TechnologyNoYes
Ivy Bridge Processor SupportNoYesNoYes
Intel Active Management, Trusted Execution, Anti-Theft, and vPro TechnologyNoYesNo
Release DateFebruary 2011May 2011January 2011May 2011
Max TDP6.1 W
Chipset lithography65 nm

[9] Table updated with the latest information from Intel ARK

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 Although some of the chipsets do not support conventional PCI, motherboard manufacturers may include support through the addition of third party chips.

Ivy Bridge chipsets[edit]

All Ivy Bridge chipsets and motherboards support both Sandy Bridge and Ivy Bridge CPUs. Ivy Bridge based processors will officially support up to DDR3-1600, up from DDR3-1333 of Sandy Bridge. Some consumer Ivy Bridge chipsets will also allow overclocking of K-series processors.[10]

NameB75Q75Q77H77Z75Z77
OverclockingCPU(Bclk) + GPUCPU + GPU + RAM
Allows using built-in GPUYes
Intel Clear Video TechnologyYes
RAIDNoYes
Maximum USB 2.0/3.0 ports8 / 410 / 4
Maximum SATA 2.0/3.0 ports5 / 14 / 2
Main PCIe Configuration31 × PCIe 3.0 ×161 × PCIe 3.0 ×16
or 2 × PCIe 3.0 ×8
1 × PCIe 3.0 ×16
or 2 × PCIe 3.0 ×8
or 1 × PCIe 3.0 ×8 + 2 × PCIe 3.0 ×4
Secondary PCIe8 × PCIe 2.0
Conventional PCI4Yes [11]No
Intel Rapid Storage TechnologyNoYes
Intel Anti-Theft TechnologyYes
Smart Response TechnologyNoYesNoYes
Intel vProNoYesNo
Release DateApril 2012[12]
Max TDP6.7 W
Chipset lithography65 nm[13]

[14]

3 For PCIe 3.0 capability, the Ivy Bridge CPU must have the relevant PCIe 3.0 controller built in. Some Ivy Bridge CPUs only have a PCIe 2.0 controller built in.

4 Although some of the chipsets do not support conventional PCI, motherboard manufacturers may include support through the addition of third party chips.

See also[edit]

References[edit]