Type LGA Predecessor LGA 1150 | Contacts 1151 Memory support DDR4, DDR3, DDR3L | |
Processors Skylake, Kaby Lake, Cannonlake (might be cancelled for this socket), Coffee Lake | ||
LGA 1151 is an Intel microprocessor compatible socket which supports the Intel Skylake and the Kaby Lake CPU microarchitectures.
Contents
LGA 1151 is designed as a replacement for the LGA 1150 (known as Socket H3). LGA 1151 has 1151 protruding pins to make contact with the pads on the processor. The voltage regulator has again been moved from the CPU die to motherboard.
Most motherboards for this socket support solely DDR4 memory, a lesser number support DDR3(L) memory, and the least number have slots for both DDR4 or DDR3(L) but only one memory type can be installed. Some will have UniDIMM support, enabling either type of memory to be placed in the same DIMM, rather than having separate DDR3 and DDR4 DIMMs.
All Skylake chipsets support Intel Rapid Storage Technology, 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, HDMI 1.4 or DisplayPort 1.2 – depending on the model). VGA output is optional because Skylake CPUs have dropped support for this video interface. HDMI 2.0 (4K@60 Hz) is only supported on motherboards equipped with Intel’s Alpine Ridge Thunderbolt controller.
Skylake chipsets do not support conventional PCI interface; however, motherboard vendors may implement it using external chips.
Cooling solutions for sockets LGA 1151, 1150, 1155 and 1156 are interchangeable as they all have the same distance of 75 mm between each screw hole.
DDR3 memory support
Intel officially says that Skylake's integrated memory controller (IMC) supports only DDR3L memory modules at 1.35 V and DDR4 at 1.2 V, leading to speculation that higher voltages of DDR3 modules could damage or destroy the IMC and processor. Meanwhile, Asrock, Gigabyte and ASUS all guarantee that their Skylake DDR3 motherboards support DDR3 modules rated at 1.5 and 1.65V.
Kaby Lake chipsets
A Kaby Lake descendant for the H110 chipset doesn't exist. Four additional PCH PCI-E lanes in Kaby Lake chipsets are only meant for implementing an M.2 slot to support Intel Optane Memory which means that appropriate Kaby Lake and Sky Lake chipsets are practically the same.
Light blue indicates a difference between comparable Sky Lake and Kaby Lake chipsets.