| Type | LGA |
|---|---|
| Contacts | 1155 |
| Processor dimensions | 37.5mm × 37.5mm[1] |
| Processors | Sandy Bridge, Ivy Bridge |
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This article is part of the CPU socket series |
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LGA 1155, also called Socket H2, is an Intel microprocessor compatible socket which supports Intel Sandy Bridge and the up-coming Ivy Bridge microprocessors.
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 solutions are backwards compatible between both LGA 1155 and LGA 1156 sockets, due to both having the same distance of 75 mm between each screw hole.[2]
Integrated USB 3.0 is confirmed for the future Z77, Z75 and H77 chipsets intended for Ivy Bridge CPUs. Refer here for the complete list of Sandy Bridge socket 1155 chipsets.
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Sandy Bridge chipsets, except Q65, Q67 and B65, support both Sandy Bridge and Ivy Bridge CPUs though a BIOS upgrade is required.[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]
| Name | B651 | H61 | Q671 | H67 | P67 | Z68 |
|---|---|---|---|---|---|---|
| Maximum DDR3 slots | 4 | 2 | 4 | 4 | 4 | 4 |
| Overclocking | GPU | GPU | GPU | GPU | CPU + RAM | CPU + GPU + RAM |
| Allows using built-in GPU | Yes | Yes | Yes | Yes | No | Yes |
| RAID | No | No | Yes | Yes | Yes | Yes |
| Maximum USB 2.0 ports2 | 12 | 10 | 14 | 14 | 14 | 14 |
| Maximum SATA 2.0/3.0 ports | 4 / 1 | 4 / 0 | 4 / 2 | 4 / 2 | 4 / 2 | 4 / 2 |
| Main PCIe Configuration | 1 × PCIe 2.0 ×16 | 1 × PCIe 2.0 ×16 | 1 x PCIe 2.0 x16 | 1 × PCIe 2.0 ×16 | 1 × PCIe 2.0 ×16 or 2 × PCIe 2.0 ×8 |
1 × PCIe 2.0 ×16 or 2 × PCIe 2.0 ×8 |
| Secondary PCIe | 8 × PCIe 2.0 | 6 × PCIe 2.0 | 8 x PCIe 2.0 | 8 × PCIe 2.0 | 8 × PCIe 2.0 | 8 × PCIe 2.0 |
| Intel Rapid Storage Technology | No | No | Yes | Yes[5] | Yes | Yes |
| Intel Active Management Technology | No | No | Yes | No | No | No |
| Intel Trusted Execution Technology | No | No | Yes | No | No | No |
| Smart Response Technology | No | No | No | No | No | Yes[6] |
| Release Date | February 2011 | February 2011 | May 2011 | January 2011 | January 2011 | May 2011[6] |
| Max TDP | 6.1 W | |||||
| Lithography | 65 nm | |||||
1 Ivy Bridge CPUs are not supported by this chipset.
2 USB3.0 is not supported by any of these chipsets. Motherboard manufacturers use external solutions to add USB3.0 support.
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. All Ivy Bridge chipsets will also allow overclocking of K-series processors.
| Name | B75 | Q75 | Q77 | H77 | Z75 | Z77 |
|---|---|---|---|---|---|---|
| Maximum DDR3 slots | ? | ? | ? | 4 | 4 | 4 |
| Overclocking | ? | ? | ? | GPU | CPU + GPU + RAM | CPU + GPU + RAM |
| Allows using built-in GPU | ? | ? | ? | Yes | Yes | Yes |
| RAID | Yes | Yes | Yes | Yes | Yes | Yes |
| Maximum USB 2.0/3.0 ports | 8 / 4 | 10 / 4 | 10 / 4 | 10 / 4 | 10 / 4 | 10 / 4 |
| Maximum SATA 2.0/3.0 ports | 5 / 1 | 5 / 1 | 4 / 2 | 4 / 2 | 4 / 2 | 4 / 2 |
| Main PCIe Configuration | ? | ? | ? | 1 × PCIe 3.0 ×16 | 1 × 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 PCIe | 8 × PCIe 2.0 | 8 × PCIe 2.0 | 8 × PCIe 2.0 | 8 × PCIe 2.0 | 8 × PCIe 2.0 | 8 × PCIe 2.0 |
| PCI | Yes | Yes | Yes | No | No | No |
| Intel Rapid Storage Technology | No | No | Yes | Yes | Yes | Yes |
| Smart Response Technology | No | No | Yes | Yes | No | Yes |
| Release Date | 2012 | 2012 | 2012 | 2012 | 2012 | 2012 |
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