LGA 1151, also known as Socket H4,

zero insertion force Zero insertion force (ZIF) is a type of IC socket or electrical connector that requires very little (but not literally zero) force for insertion. With a ZIF socket, before the IC is inserted, a lever or slider on the side of the socket is mo ...

flip-chip Flip chip, also known as controlled collapse chip connection or its abbreviation, C4, is a method for interconnecting dies such as semiconductor devices, IC chips, integrated passive devices and microelectromechanical systems (MEMS), to exter ...

land grid array The land grid array (LGA) is a type of surface-mount packaging for integrated circuits (ICs) that is notable for having the pins on the socket (when a socket is used) rather than the integrated circuit. An LGA can be electrically connected to a ...

(LGA)

socket Socket may refer to: Mechanics * Socket wrench, a type of wrench that uses separate, removable sockets to fit different sizes of nuts and bolts * Socket head screw, a screw (or bolt) with a cylindrical head containing a socket into which the hexag ...

for

Intel Intel Corporation is an American multinational corporation and technology company headquartered in Santa Clara, California. It is the world's largest semiconductor chip manufacturer by revenue, and is one of the developers of the x86 seri ...

desktop

processors A central processing unit (CPU), also called a central processor, main processor or just processor, is the electronic circuitry that executes instructions comprising a computer program. The CPU performs basic arithmetic, logic, controlling, ...

which comes in two distinct versions: the first revision which supports both Intel's Skylake and

Kaby Lake Kaby Lake is Intel's codename for its seventh generation Core microprocessor family announced on August 30, 2016. Like the preceding Skylake, Kaby Lake is produced using a 14 nanometer manufacturing process technology. Breaking with Intel's ...

CPUs, and the second revision which supports

Coffee Lake Coffee Lake is Intel's codename for its eighth generation Core microprocessor family, announced on September 25, 2017. It is manufactured using Intel's second 14 nm process node refinement. Desktop Coffee Lake processors introduced i5 and i ...

CPUs exclusively. LGA 1151 is designed as a replacement for the

LGA 1150 LGA 1150, also known as Socket H3, is a zero insertion force flip-chip land grid array (LGA) CPU socket designed by Intel for CPUs built on the Haswell microarchitecture. This socket is also used by the Haswell's successor, Broadwe ...

(known as ''Socket H3''). LGA 1151 has 1151 protruding pins to make contact with the pads on the processor. The

Fully Integrated Voltage Regulator A voltage regulator module (VRM), sometimes called processor power module (PPM), is a buck converter that provides microprocessor and chipset the appropriate supply voltage, converting , or to lower voltages required by the devices, allowing dev ...

, i.e. a voltage regulator which integrated on the CPU's die, introduced with Haswell and Broadwell, has again been moved to the motherboard. Most motherboards for the first revision of the socket support solely

DDR4 Double Data Rate 4 Synchronous Dynamic Random-Access Memory (DDR4 SDRAM) is a type of synchronous dynamic random-access memory with a high bandwidth (" double data rate") interface. Released to the market in 2014, it is a variant of dynamic ra ...

memory, a lesser number support DDR3(L) memory, and the least number have slots for both

or DDR3(L) but only one memory type can be installed. Some have

UniDIMM UniDIMM (short for Universal DIMM) is a specification for dual in-line memory modules (DIMMs), which are printed circuit boards (PCBs) designed to carry dynamic random-access memory (DRAM) chips. UniDIMMs can be populated with either DDR3 or ...

support, enabling either type of memory to be placed in the same DIMM, rather than having separate DDR3 and DDR4 DIMMs. The second revision socket motherboards support only DDR4 memory. Skylake, Kaby Lake, and Coffee Lake chipsets support

VT-d x86 virtualization is the use of hardware-assisted virtualization capabilities on an x86/x86-64 CPU. In the late 1990s x86 virtualization was achieved by complex software techniques, necessary to compensate for the processor's lack of hardware-as ...

Intel Rapid Storage Technology Intel Rapid Storage Technology (RST) is a driver SATA AHCI and a firmware-based RAID solution built into a wide range of Intel chipsets. Currently also is installed as a driver for Intel Optane temporary storage units. It contains two oper ...

, Intel Clear Video Technology, and Intel Wireless Display Technology (an appropriate CPU is required). Most motherboards with the LGA 1151 socket support varying video outputs (

DVI Digital Visual Interface (DVI) is a video display interface developed by the Digital Display Working Group (DDWG). The digital interface is used to connect a video source, such as a video display controller, to a display device, such as a comp ...

HDMI High-Definition Multimedia Interface (HDMI) is a proprietary audio/video interface for transmitting uncompressed video data and compressed or uncompressed digital audio data from an HDMI-compliant source device, such as a display controller, ...

1.4 or

DisplayPort DisplayPort (DP) is a digital display interface developed by a consortium of PC and chip manufacturers and standardized by the Video Electronics Standards Association (VESA). It is primarily used to connect a video source to a display device su ...

1.2 – depending on the model).

VGA Video Graphics Array (VGA) is a video display controller and accompanying de facto graphics standard, first introduced with the IBM PS/2 line of computers in 1987, which became ubiquitous in the PC industry within three years. The term can no ...

output is ''optional'' since Intel dropped support for this video interface starting with Skylake. HDMI 2.0 ( 4K@60 Hz) is only supported on motherboards equipped with Intel's Alpine Ridge Thunderbolt controller. Skylake, Kaby Lake, and Coffee Lake chipsets do not support the legacy

conventional PCI Peripheral Component Interconnect (PCI) is a local computer bus for attaching hardware devices in a computer and is part of the PCI Local Bus standard. The PCI bus supports the functions found on a processor bus but in a standardized format th ...

interface; however, motherboard vendors may implement it using external chips.

Heatsink

The 4 holes for fastening the heatsink to the motherboard are placed in a square with a lateral length of 75 mm for Intel's sockets

LGA 1156 LGA 1156 (land grid array 1156), also known as Socket H or H1, is an Intel desktop CPU socket. Its incompatible successor is LGA 1155. The last processors supporting it ceased production in 2011. LGA 1156, along with LGA 1366, were designed t ...

LGA 1155 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 (2nd Gen) and Ivy Bridge (3rd Gen) microarchitectures. It is the successor of L ...

, LGA 1151 and

LGA 1200 LGA 1200 is a zero insertion force flip-chip land grid array (LGA) CPU socket, socket, compatible with Intel desktop Central processing unit, processors Comet Lake (10th gen) and Rocket Lake (11th-gen) desktop CPUs, which was released in April 202 ...

. Cooling solutions should therefore be interchangeable.

LGA 1151 revision 1

DDR3 memory support

Intel officially states that Skylake's and Kaby Lake's integrated memory controllers (IMC) support DDR3L memory modules only rated at 1.35 V and DDR4 at 1.2 V, which led to the speculation that higher voltages of DDR3 modules could damage or destroy the IMC and processor. Meanwhile,

ASRock ASRock Inc. is a Taiwanese manufacturer of motherboards, industrial PCs and home theater PCs (HTPC). Founded by Ted Hsu, it was founded in 2002 and is currently owned by Taiwanese electronics company Pegatron. History ASRock was originally sp ...

Gigabyte The gigabyte () is a multiple of the unit byte for digital information. The prefix ''giga'' means 109 in the International System of Units (SI). Therefore, one gigabyte is one billion bytes. The unit symbol for the gigabyte is GB. This defini ...

, and Asus guarantee that their Skylake and Kaby Lake DDR3 motherboards support DDR3 modules rated at 1.5 and 1.65V.

Skylake chipsets (100 series and C230 series)

Kaby Lake chipsets (200 series)

There is no equivalent Kaby Lake chipset analogous to the H110 chipset. Four additional PCH PCI-E lanes in Kaby Lake chipsets are reserved for implementing an M.2 slot to support Intel Optane Memory. Otherwise, corresponding Kaby Lake and Skylake chipsets are practically the same. Light blue indicates a difference between comparable Skylake and Kaby Lake chipsets.

LGA 1151 revision 2

Second revision of the LGA 1151 socket for Coffee Lake CPUs

The LGA 1151 socket was revised for the

generation CPUs and comes along with the Intel 300-series chipsets. While physical dimensions remain unchanged, the updated socket reassigns some reserved pins, adding power and ground lines to support the requirements of 6-core and 8-core CPUs. The new socket also relocates the processor detection pin, breaking compatibility with earlier processors and motherboards. As a result, desktop

CPUs are officially not compatible with the 100 (original Skylake) and 200 (Kaby Lake) series chipsets. Similarly, 300 series chipsets officially only support Coffee Lake and are not compatible with Skylake and Kaby Lake CPUs. Socket 1151 rev 2 is sometimes also referred to as "1151-2".

Coffee Lake chipsets (300 series and C240 series)

Like with Kaby Lake chipsets, four additional PCH PCI-E lanes in Coffee Lake chipsets are reserved for implementing an M.2 slot to support Intel Optane Memory. There's a 22 nm version of H310 chipset, H310C, which is sold only in China. Motherboards based on this chipset support DDR3 memory as well. ** depends on OEM's implementation

References

{{Intelsock Intel CPU sockets Computer-related introductions in 2015