# 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 in October 24, 2024.
The number of contacts has increased, from 1700 (for LGA 1700) to 1851. 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.

## Arrow Lake chipsets (800 series)

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