LGA 1151
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| LGA 1151 | |
|---|---|
 Xaar · CC BY-SA 4.0 · source | |
| Name | LGA 1151 |
| Type | CPU socket |
| Form factor | Land Grid Array |
| Contacts | 1151 |
| Introduced | 2015 |
| Designed by | Intel |
| Used for | Desktop microprocessors |
LGA 1151.
Overview
LGA 1151 is a desktop CPU socket introduced by Intel to support multiple generations of Intel Core microprocessors and related Intel Xeon and Intel Pentium products; it succeeded LGA 1150 and preceded LGA 1200 while coexisting with platform products from vendors such as ASUS, Gigabyte Technology, MSI (company), ASRock. The socket was announced in the context of platform strategies involving Skylake (microarchitecture), Kaby Lake, Coffee Lake, and later refreshes, tying into chipset families including Intel 100 Series chipset, Intel 200 Series chipset, Intel 300 Series chipset, and motherboard features marketed by companies like Intel Corporation, Realtek Semiconductor, Broadcom Inc., Nuvoton Technology. Its release intersected with industry events such as Computex, CES and product launches by OEMs like Dell, HP Inc., Lenovo, Acer.
Socket design and specifications
The socket uses a Land Grid Array with 1151 lands and a zero insertion force retention system developed by Intel, reflecting electrical and mechanical specifications coordinated with standards bodies and partners including JEDEC, PCI-SIG, USB Implementers Forum, VESA, and component suppliers such as Samsung Electronics and SK Hynix for memory validation. Mechanical specifications reference notches and keyed orientations similar to preceding sockets used in platforms promoted at trade shows like Intel Developer Forum and in collaborations with ecosystem firms such as EVGA Corporation and NZXT. Electrical pinout and power delivery considerations were validated against processor thermal and power targets defined by Intel Thermal Design Power guidelines and tested with power management firmware from vendors like Phoenix Technologies and American Megatrends.
Supported chipsets and compatibility
Intel paired the socket with multiple chipset families: the initial roll-out used Intel 100 Series chipset variants such as Z170 chipset and H170 chipset for enthusiast and mainstream boards marketed by ASUS ROG, MSI MAG, Gigabyte AORUS, while subsequent refreshes added Intel 200 Series chipset and later Intel 300 Series chipset devices including Z270 chipset, B250 chipset, Z370 chipset to enable more PCIe lanes, memory channels, and storage interfaces promoted by storage firms like Samsung and controller vendors like ASMedia Technology. Motherboard makers implemented features like native Thunderbolt support through collaborations with Intel Thunderbolt, RAID and NVMe arrays from firms such as Intel Optane partnerships, and networking solutions from Intel Ethernet and Killer Networking used in systems by Alienware and Razer Inc..
Processor generations and compatibility lists
Socket support covered multiple Intel microarchitectures and product families: initial compatibility announcements targeted Skylake (microarchitecture) generations of Intel Core i7, Intel Core i5, Intel Core i3, Intel Pentium and Intel Celeron processors; later compatibility lists expanded for Kaby Lake and, with chipset restrictions, for certain Coffee Lake (microarchitecture) processors. OEM and motherboard vendors published CPU support lists for each BIOS/UEFI revision developed by firmware partners like Insyde Software and American Megatrends; community resources and archives maintained by sites such as AnandTech, Tom's Hardware, TechPowerUp catalogued compatibility matrices. Enterprise-oriented Intel Xeon E3 variants for workstations and entry servers were validated on select workstation boards from Supermicro and ASRock Rack.
Physical installation and retention mechanism
The socket uses a lever-actuated retention bracket and integrated load plate designed by Intel engineers working with mechanical vendors like Foxconn and Jabil; installation procedures were demonstrated in platform guides, assembly videos and teardown analyses by publications such as iFixit, Linus Tech Tips, Gamers Nexus. The CPU package seating and heatspreader contact are specified for compatibility with cooling solutions from Noctua, Corsair (company), Cooler Master, and AIO suppliers like NZXT and EKWB, and mounting hole patterns conform to standards referenced in cooling compatibility charts published by chassis manufacturers such as Fractal Design and Cooler Master.
Market history and successors
LGA 1151's lifecycle began with broad adoption across consumer desktop platforms from mainstream to gaming PCs, with motherboard SKUs evolving through chipset revisions and vendor innovation at events like Computex; it later encountered fragmentation when Intel split compatibility across 100/200 and 300 series chipsets, prompting controversy covered by outlets like The Verge and Ars Technica. The socket was eventually superseded by LGA 1200 and later LGA 1700 as Intel moved to new microarchitectures and I/O requirements, while secondhand and legacy markets continued around enthusiast modding communities on forums such as Overclock.net, Reddit (website), and archival lists on CPU-World.