LGA 1155
{{Short description|Intel CPU socket}}
{{Use mdy dates|date=November 2022}}
{{Infobox CPU socket
| name = LGA 1155
| image = 280px
| formfactors = Flip-chip
| contacts = 1155
| protocol = PCI Express
| fsb =
| voltage =
| processors = Sandy Bridge
Ivy Bridge
| predecessor = LGA 1156
| successor = LGA 1150
| memory = DDR3
|release-date=2011}}
File:Intel CPU Core i7 2600K Sandy Bridge perspective.jpg
File:Celeron G530 2.4GHz(3).jpg
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 (second generation core) and Ivy Bridge (third generation) microarchitectures.
Introduced in 2011, it is the successor of LGA 1156 (known as Socket H) and was itself succeeded by LGA 1150 in 2013. Along with selected variations of LGA 2011 socket, it was the last Intel socket to fully support Windows XP, Windows Server 2003, Windows Vista, and Windows Server 2008.
LGA 1155 has 1155 protruding pins to make contact with the pads on the processor. The pins are arranged in a 40×40 array with a 24×16 central void and additional 61 omitted pins (two adjoining the central void, six in each of the four corners, and 35 in groups around the perimeter), yielding the 1600 − 384 − 61 = 1155 pin count. Processors for LGA 1155 and LGA 1156 sockets are not compatible with each other since they have different socket notches.
LGA 1155 also marked the beginning of UEFI secure boot with support in some later boards.
Heatsink
The four holes for fastening the heatsink to the motherboard are placed in a square with a lateral length of 75mm for Intel's sockets LGA 1156, LGA 1155, LGA 1150, LGA 1151 and LGA 1200. Cooling solutions should therefore be interchangeable.
Cooling systems are compatible between LGA 1155 and LGA 1156 sockets, as the processors have the same dimensions, profile and construction, and similar levels of heat production.{{cite web |title=2nd Gen Intel Core Processor, LGA1155 Socket |url=http://download.intel.com/design/processor/designex/324644.pdf |website=Intel |language=en-US |access-date=September 26, 2012 |url-status=dead |archive-url=https://web.archive.org/web/20110713044342/http://download.intel.com/design/processor/designex/324644.pdf |archive-date=July 13, 2011}}
''Sandy Bridge'' family of chipsets
{{see also|Cougar Point|List of Intel chipsets#LGA 1155}}
Sandy Bridge chipsets, except B65, Q65 and Q67, support both Sandy Bridge and Ivy Bridge CPUs through a BIOS upgrade.{{Cite web |title=Ivy Bridge Quad-Core to Have 77W TDP, Intel Plans for LGA1155 Ivy Bridge Entry |url=http://www.techpowerup.com/153756/Ivy-Bridge-Quad-Core-to-Have-77W-TDP-Intel-Plans-for-LGA1155-Ivy-Bridge-Entry.html |website=TechPowerUp |language=en-US |date=October 18, 2011 |access-date=September 26, 2012}} With third-party BIOSes like Coreboot, Ivy Bridge processors can be used on those chipsets as well.{{Cite web | title=HP Elite 8200 SFF and 6200 Pro Business | url=https://libreboot.org/docs/hardware/hp8200sff.html |website=Libreboot |access-date=April 19, 2023}} Processors based on Sandy Bridge officially support up to DDR3-1333 memory, however in practice speeds up to DDR3-2133 have been tested to work successfully.{{Cite web |last=Bell |first=Jared |date=July 25, 2011 |title=Sandy Bridge Memory Scaling: Choosing the Best DDR3 |url=http://www.anandtech.com/show/4503/sandy-bridge-memory-scaling-choosing-the-best-ddr3/3 |website=AnandTech |language=en-US |access-date=September 26, 2012}}
The H61 chipset only supports one double-sided DIMM Memory module (RAM module) per memory-channel and therefore is limited to 16{{nbsp}}GB instead of the 32{{nbsp}}GB like the others support.{{Cite web |title=Intel H61 Express Chipset |url=http://www.intel.com/content/www/us/en/chipsets/mainstream-chipsets/h61-express-chipset.html?wapkw=h61 |website=Intel |language=en-US |access-date=September 26, 2012}} On H61-based motherboards with four DIMM slots, only four single-sided DIMMs can be installed.{{Cite web |title=Motherboards- ASUS P8H61 EVO |url=http://www.asus.com/Motherboards/Intel_Socket_1155/P8H61_EVO/#specifications |website=ASUS |language=en-US |access-date=September 26, 2012}}
{{sticky header}}
| class="wikitable sticky-header" style="text-align: center" |
| colspan="2" style="width:250px;" | Name{{cite web |title=ARK - Compare Intel Products |url=https://ark.intel.com/compare/52816,52812,52811,52810,52807,52806,52801 |work=Intel |language=en-US |access-date=September 26, 2012}} || style="width:100px;"| [https://ark.intel.com/products/52806 H61]
! style="width:100px;" | [https://ark.intel.com/products/52801 B65] ! style="width:100px;" | [https://ark.intel.com/products/52811 Q65] ! style="width:100px;" | [https://ark.intel.com/products/52812 Q67] ! style="width:100px;" | [https://ark.intel.com/products/52807 H67]{{cite web |title=Intel H67 Express Chipset |url=http://www.intel.com/content/www/us/en/chipsets/mainstream-chipsets/h67-express-chipset.html |website=Intel |language=en-US |access-date=September 26, 2012}} ! style="width:100px;" | [https://ark.intel.com/products/52810 P67] ! style="width:125px;" | [https://ark.intel.com/products/52816 Z68]{{cite web |title=Intel SSD Caching Feature for Z68 Chipset Explored |url=http://vr-zone.com/articles/intel-ssd-caching-feature-for-z68-chipset-explored/11953.html |url-status=dead |website=VR Zone |date=April 25, 2011 |access-date=September 26, 2012 |archive-date=April 28, 2012 |archive-url=https://web.archive.org/web/20120428001552/http://vr-zone.com/articles/intel-ssd-caching-feature-for-z68-chipset-explored/11953.html }} |
|---|
| colspan="2" | Overclocking
| colspan="5" | GPU | CPU + RAM | {{BLACK|style=color:white;|CPU + GPU + RAM}} |
| colspan="2" | Allows using built-in GPU with Intel Clear Video Technology
| colspan=5 {{Yes}} | {{No}} | {{Yes}} |
| colspan="2" | Maximum USB 2.0 ports{{Efn|USB 3.0 is not supported by any of these chipsets. Motherboard manufacturers may use external hardware to add USB 3.0 support.}}
| 10 | 12 | colspan="5" | 14 |
| rowspan="2" | Maximum SATA ports
! 2.0 | colspan="7" | 4 |
| 3.0
| 0 | 1 | colspan="5" |2 |
| colspan="2" | Main PCIe configuration
| colspan="5" | 1 × PCIe 2.0 ×16 (Some H61 Motherboards Support PCIe 3.0) | colspan="2" | {{plainlist|
}} |
| colspan="2" | Secondary PCIe
| 6 × PCIe 2.0 ×1 | colspan="6" | 8 × PCIe 2.0 ×1 |
| colspan="2" | Conventional PCI support{{Efn|name="pci-bridge"|Although some of the chipsets do not support conventional PCI, motherboard manufacturers may include support through the addition of third-party PCI bridges.}}
| {{No}} |colspan="3" {{Yes}} |colspan="3" {{no}} |
| colspan="2" | Intel Rapid Storage Technology (RAID)
| colspan="3" {{No}} | colspan="4" {{Yes}} |
| colspan="2" | Smart Response Technology
| colspan="6" {{No}} | {{Yes}} |
| colspan="2" | Ivy Bridge processor support
| {{Yes}} | colspan="3" {{No}} | colspan="3" {{Yes}} |
| colspan="2" | Intel Active Management, Trusted Execution, Anti-Theft, and vPro Technology
| colspan="3" {{No}} | {{Yes}} | colspan="3" {{No}} |
| colspan="2" | Release date
| colspan="2" | February 2011 | colspan="2" | May 2011 | colspan="2" | January 2011 | May 2011 |
| colspan="2" | Maximum TDP
| colspan="7" | 6.1 W |
| colspan="2" | Chipset lithography
| colspan="7" | 65 nm |
''Ivy Bridge'' family of chipsets
{{see also|Panther Point|List of Intel chipsets#LGA 1155}}
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.{{cite web |last=Vättö |first=Kristian |date=May 6, 2011 |title=Intel's Roadmap: Ivy Bridge, Panther Point, and SSDs |url=http://www.anandtech.com/show/4318/intel-roadmap-ivy-bridge-panther-point-ssds/2 |website=AnandTech |language=en-US |access-date=September 26, 2012}}
{{sticky header}}
| class="wikitable sticky-header" style="text-align: center" |
| colspan="2" style="width:250px;" | Name{{cite web |title=ARK - Compare Intel Products |url=http://ark.intel.com/compare/64024,64021,64018,64027,64033,64030 |work=Intel |language=en-US |date=September 26, 2012}}
! style="width:100px;" | [https://ark.intel.com/products/64030 B75] ! style="width:100px;" | [https://ark.intel.com/products/64033 Q75] ! style="width:100px;" | [https://ark.intel.com/products/64027 Q77] ! style="width:100px;" | [https://ark.intel.com/products/66416 C216] ! style="width:100px;" | [https://ark.intel.com/products/64018 H77] ! style="width:100px;" | [https://ark.intel.com/products/64021 Z75] ! style="width:100px;" | [https://ark.intel.com/products/64024 Z77] |
|---|
| colspan="2" | Overclocking
| colspan="5" | CPU (Base Clock) + GPU | {{BLACK|style=color:white;|CPU + GPU + RAM}} | {{BLACK|style=color:white;|CPU + GPU + RAM}} |
| colspan="2" | Allows using built-in GPU
| colspan="7" {{Yes}} |
| colspan="2" | Intel Clear Video Technology
| colspan=7 {{Yes}} |
| colspan="2" | RAID
| {{No}} | colspan="6" {{Yes}} |
| rowspan="2" | Maximum USB ports ! 2.0 | 8 | colspan="6" | 10 |
| 3.0
| colspan="7" | 4 |
| rowspan="2" | Maximum SATA ports ! 2.0 | colspan="2" | 5 | colspan="5" | 4 |
| 3.0
| colspan="2" | 1 | colspan="5" | 2 |
| colspan="2" | Main PCIe configuration{{Efn|For PCIe 3.0 capability, the Ivy Bridge CPU must have the relevant PCIe 3.0 controller built in. However, some Ivy Bridge CPUs only have a PCIe 2.0 controller built in.}}
| colspan="5" | 1 × PCIe 3.0 ×16 | {{plainlist|
}} | {{plainlist|
}} |
| colspan="2" | Secondary PCIe
| colspan="7" | 8 PCIe 2.0 ×1 |
| colspan="2" | Conventional PCI{{Efn|name="pci-bridge"}}
| colspan="4" {{Yes}} |
| colspan="2" | Intel Rapid Storage Technology
| colspan="2" {{No}} | colspan="5" {{Yes}} |
| colspan="2" | Intel Anti-Theft Technology
| colspan=7 {{Yes}} |
| colspan="2" | Smart Response Technology
| colspan="2" {{No}} | colspan="3" {{Yes}} | {{No}} | {{Yes}} |
| colspan="2" | Intel vPro Platform Eligibility
| colspan="2" {{No}} | colspan="2" {{Yes}} | colspan="3" {{No}} |
| colspan="2" | Release date
| May 2012 | colspan="3" | April 2012 |
| colspan="2" | Maximum TDP
| colspan="7" | 6.7 W |
| colspan="2" | Chipset lithography |
NVMe support
{{Main|NVM Express}}
A {{ill|PC Games Hardware|de}} user by the name of Mephisto_xD wrote an article on that website describing how to take UEFI modules from some Z97 motherboards and use them with an Z77-motherboard to make the latter support booting from an SSD using the NVM Express protocol, instead of the AHCI protocol.{{cite web |title=Booten von einer NVMe-SSD mit Sandy-/Ivy-Bridge-Hardware |url=http://www.pcgameshardware.de/SSD-Hardware-255552/Tipps/Booten-von-einer-NVMe-SSD-mit-Sandy-Ivy-Bridge-Hardware-Anleitung-User-Artikel-von-Mephisto-xD-1206051/ |website=PC Games Hardware |language=de |date=October 13, 2016 |access-date=November 13, 2022}} That article claims, the Z97 motherboards were the first to officially and fully support the NVMe protocol.
The modifications described also work with P67, B75 and other chipset motherboards.
Notes
{{Notelist}}
References
{{Reflist|30em}}
External links
- [http://www.intel.com/support/processors/sb/CS-030850.htm Intel desktop processor integration overview (LGA115x)]
{{Intelsock}}