Igor Wallossek over at Igor's Lab has posted a range of technical specs for Intel's upcoming LGA-1851 socket and it covers everything from the pin-out to the mechanical characteristics of the new socket. The new socket is intended for Intel's Arrow Lake S CPU which will launch as Intel's 14th gen—and last generation—Core i desktop processor. Although the new socket has additional pins, the physical size remains the same as the LGA-1700 sockets, so it's expected that coolers will remain compatible with the LGA-1851 socket. However, the mounting pressure has almost doubled from 489.5 N to 923 N, suggesting that a different mounting kit might be needed.

What is more interesting with regards to the new socket is that Igor confirms that Intel will be adding four PCIe 5.0 lanes for a CPU connected NVMe SSD, but apparently Intel will also keep the current four PCIe 4.0 lanes for a second CPU connected NVMe SSD, not quite matching AMD's AM5 platform. It's likely that we'll see a similar segmentation like the one AMD has done, so only Z-series chipset motherboards will be able to take advantage of the PCIe 5.0 NVMe lanes, but it's possible some other chipset SKUs from Intel will enable PCIe 5.0 storage support as well. Overall, Intel aren't doing any big changes here and the move to a new socket for a potential end of the road platform seems like a strange move by Intel.