LGA 1851

LGA 1851 (codename Socket V1) is a land grid array CPU socket designed by Intel for Meteor Lake-PS and Arrow Lake-S desktop processors, released on October 24, 2024.^[1]

LGA 1851

Release date	October 24, 2024
Designed by	Intel
Type	LGA-ZIF
Chip form factors	Flip-chip
Contacts	1851
FSB protocol	PCI Express
Processor dimensions	37.5 mm × 45 mm 1,687.5mm2
Processors	Meteor Lake-PS Arrow Lake
Predecessor	LGA 1700
Successor	LGA 1954
Memory support	DDR5
This article is part of the CPU socket series

An LGA 1851 socket

Contacts of the Intel Core Ultra 9 285K (left, LGA 1851), and i9-14900K (right, Socket 1700)

The number of contacts has increased, from 1700 (for LGA 1700) to 1851.^[2] It uses the same dimensions and cooler mounting hole spacing as LGA 1700, ensuring continued CPU cooler compatibility.

It offers 20 PCIe 5.0 lanes (x16 for the expansion cards and x4 for storage) and an additional 4 PCIe 4.0 lanes for storage. The available PCIe lanes for the expansion cards can now be bifurcated to three devices (x8, x4, x4) instead of two, in case of LGA 1700. Similar to AMD's AM5 socket, it is exclusively on DDR5 SDRAM, dropping support for DDR4 unlike its predecessor (LGA 1700), marking the end of mainstream DDR4 after 10 years.^[3][4][5][6]

Arrow Lake chipsets (800 series)

			H810[7]	B860[8]	Z890[9]
Overclocking			No	RAM only	Yes
Bus Interface			DMI 4.0 ×4		DMI 4.0 ×8
CPU support			Arrow Lake
Memory capacity			Up to 128 GB	Up to 256 GB
Maximum DIMM slots			2	4
Maximum USB 2.0 ports			10	12	14
USB 3.2 ports configuration	Gen 1x1		Up to 4	Up to 6	Up to 10
	Gen 2	×1	Up to 2	Up to 4	Up to 10
		×2	None	Up to 2	Up to 5
Maximum SATA 3.0 ports			4		8
Processor PCI Express configuration		5.0	1×16		1×16 or 2×8 or 1×8+2×4
		5.0 (for M.2)	None	1x4
		4.0 (for M.2)	1x4
PCH PCI Express configuration		4.0	8	14	24
		3.0	None
Independent display support (digital ports/pipes)			3	4
Integrated wireless			Intel Wi-Fi 6E AX211 (802.11ax / Wi-Fi 6E / Bluetooth 5.3)[a]
PCIe RAID support			No		0, 1, 5, 10
SATA RAID support			No	0, 1, 5, 10
Intel Optane memory support			No
Intel Smart Sound technology			Yes
Intel Active Management, Trusted Execution and vPro technology			No
Chipset TDP			6 W
Release date			Q1 2025		Q4 2024

Notes

1. depends on OEM's implementation