Based on Intel’s LGA 1851 socket, the new desktop platform will apparently not support the DDR4 memory standard. The new information shows that the socket will only support DDR5. In this way, Intel will gracefully transition the market from DDR4 to DDR5 by supporting three generations of Core processors (12 to 14th) with the current socket LGA 1700 supporting both memory standards. However, Leaf Hobby, a reliable source on Intel leaks, says the LGA 1851 will remain Intel’s desktop platform until 2026.LGA 1851 may be supported until 2026
The LGA 1851 is expected to launch alongside the Core (Arrow Lake) desktop processor generation, which will follow the company’s 14th Gen Raptor Lake Refresh series coming out later this year. The socket has the same dimensions as the LGA 1700, so it is expected to be compatible with heatsinks in the old socket. The LGA 1851 will have up to 32 PCIe lanes, two sets of 16 for PEG, 8 for the DMI chipset bus, and two sets of 4 for CPU-attached NVMe storage. Of these, the other set of 16 PEG lanes and 4 lanes is expected to be PCIe Gen 5 compatible, while the chipset bus will remain DMI Gen 4 x8 and the second NVMe slot connected to the CPU will be Gen 4. As Intel’s next generation processors are expected to bring updates to the iGPU, the socket may also have connections for an updated I/O.
To quickly recap the details, rumors point to the following specifications for Intel’s LGA 1851 socket and Arrow Lake family:
- LGA 1851 socket life expectancy to be extended to 2026
- Only DDR5 compatibility, no DDR4 support
- Memory support up to DDR5-6400 (Native JEDEC)
- Will start with 800 Series motherboards
- Increased PCIe Gen 5.0 lanes thanks to CPU and PCH
- Arrow Lake-S will be the first desktop family supported
- Arrow Lake-S CPUs will have 3MB of L2 cache per P-Core
- Arrow Lake-S CPUs will feature refreshed Alchemist iGPUs
- It will be released in the second half of 2024.
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