LGA 1851

LGA 1851
Release dateOctober 24, 2024
Designed byIntel
TypeLGA-ZIF
Chip form factorsFlip-chip
Contacts1851
FSB protocolPCI Express
Processor dimensions37.5 mm × 45 mm
1,687.5mm2
ProcessorsMeteor Lake-PS
Arrow Lake
PredecessorLGA 1700
Memory supportDDR5
This article is part of the CPU socket series
The revealed socket
Contacts of the Intel Core 9 Ultra 285K (left; LGA 1851), and i9-14900K (right, Socket 1700)

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 in October 24, 2024.[1]

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]

  1. ^ "Intel CPU launch plans: Refreshes, Meteor Lake and Arrow Lake". June 22, 2023. Archived from the original on June 29, 2023. Retrieved June 29, 2023.
  2. ^ Norem, Josh (June 23, 2023). "Intel Confirms Raptor Lake Refresh". ExtremeTech. Archived from the original on June 29, 2023. Retrieved June 29, 2023.
  3. ^ Klotz, Aaron (September 21, 2023). "Intel's LGA 1851 Socket For 15th Gen Arrow Lake CPUs Detailed In 3D Schematics". HotHardware. Archived from the original on 24 December 2023. Retrieved December 24, 2023.
  4. ^ "Intel LGA-1851 "Arrow Lake" Socket Detailed". TechPowerUp. September 21, 2023. Archived from the original on September 23, 2023. Retrieved December 24, 2023.
  5. ^ Norem, Josh (July 18, 2023). "Intel's Upcoming LGA 1851 Socket Details Revealed". ExtremeTech. Archived from the original on December 24, 2023. Retrieved December 24, 2023.
  6. ^ "Intel Socket LGA1851 Only Supports DDR5 Memory". TechPowerUp. August 21, 2023. Archived from the original on November 26, 2023. Retrieved November 26, 2023.