 | |
| Type | LGA |
|---|---|
| Chip form factors | Flip-chipland grid array |
| Contacts | 1156 |
| FSB protocol | PCIe 16× (video) + 4× (DMI) + 2 DP (FDI), 2DDR3 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 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:
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, andLGA 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, 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] | H55 | P55 | H57 | Q57 |
|---|---|---|---|---|
| Overclocking | Yes | No | ||
| Allows usingbuilt-in GPU with Intel Clear Video Technology | Yes | No | Yes | |
| MaximumUSB 2.0 ports[a] | 12 | 14 | ||
| MaximumSATA 2.0/3.0 ports | 6 | |||
| PATA (IDE)[b] | No | |||
| MainPCIe configuration | 1 × PCIe 2.0 ×16 | |||
| SecondaryPCIe | 6 × PCIe 2.0 ×1 | 8 × PCIe 2.0 ×1 | ||
| Conventional PCI support | Yes | |||
| Intel Rapid Storage Technology (RAID) | ? | |||
| Smart Response Technology | ? | |||
| IntelVT-d,Active Management,Trusted Execution, Anti-Theft, andvPro Technology | No | Yes | ||
| Release date | Q1'10 | Q3'09 | Q1'10 | |
| Maximum TDP | 45 W | |||
| Chipset lithography | 65,45&32 nm | |||