Intel's next-gen LGA1851 socket for 800-series motherboards detailed

pcgamer.com:

From the outside, Intel's desktop CPU roadmaps have been a bit murky over the last year or so. We have confirmation that Intel's 14th Gen Raptor Lake refresh is coming in October. Meteor Lake was initially expected in its place, before it was cancelled in favor of Arrow Lake.

Whatever Lake(s) ends up appearing in 2024, we're sure to be getting a new LGA1851 socket to replace the nearly two year old LGA1700 socket that's present on current 600-series and 700-series motherboards.

Igor's lab has been on a roll. Following its performance projections for Arrow Lake, Igor has now revealed a treasure trove of information regarding the LGA1851 socket, which will accompany not just Arrow Lake processors, but surely a generation beyond that. The LGA1851 socket will be present on Intel's 800-series chipset motherboards, presumably debuting in the form of Z890.

As the name suggests, LGA1851 comes with 151 more pins than the current LGA1700 socket does. The extra pins are primarily there to improve support for PCIe 5.0 SSDs. This means 800-series boards will support a full bandwidth PCIe 5.0 x16 slot for a graphics card and a PCIe 5.0 x4 NVMe SSD at the same time. The CPU should support a directly connected secondary PCIe 4.0 x4 SSD too. 

That all but matches AM5 motherboards with Extreme chipsets. In the case of AMD though, a secondary PCIe drive can run at PCIe 5.0 speeds too, albeit in a x8/x4/x4 configuration. Current LGA1700 boards will support a PCIe 5.0 drive, but that means sharing bandwidth with the primary x16 slot, even with only one drive installed. LGA1851 is a definite improvement in that regard.

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