LGA 1151,[1] also known as Socket H4, is a type of zero insertion force flip-chip land grid array (LGA) socket for Intel desktop processors which comes in two distinct versions: the first revision which supports both Intel's Skylake[2] and Kaby Lake CPUs, and the second revision which supports Coffee Lake CPUs exclusively.

Most motherboards with the LGA 1151 socket support varying video outputs (DVI, HDMI 1.4 or DisplayPort 1.2 – depending on the model).

[6] HDMI 2.0 (4K@60 Hz) is only supported on motherboards equipped with Intel's Alpine Ridge Thunderbolt controller.

[10] Meanwhile, ASRock, Gigabyte, and Asus guarantee that their Skylake and Kaby Lake DDR3 motherboards support DDR3 modules rated at 1.5 and 1.65V.

Four additional PCH PCI-E lanes in Kaby Lake chipsets are reserved for implementing an M.2 slot to support Intel Optane Memory.

[33] 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.