Intel Arrow Lake-S Desktop “800-Series” CPU Platform Leak Reveals 20 Dedicated Gen5 Lanes, Faster DDR5 Support

Intel’s Arrow Lake-S “800-series” Desktop CPU platform block diagram has leaked out and it reveals dedicated Gen5 lanes.

Intel’s Arrow Lake-S Desktop CPUs To Feature Support on 800-Series Platform With Up To 20 Dedicated PCIe Gen5 Lanes

Intel’s 800-series platform for Arrow Lake-S Desktop CPUs has leaked out once again. Earlier, we had seen the platform details leak out back in January (2024) and now we have a newer platform diagram that is a little bit less detailed than the previous one but looks like it was revealed in a partner presentation and published over at Chiphell Forums.

As for the platform, Intel will offer Arrow Lake-S Desktop CPUs on its brand new LGA 1851 socketed motherboards with the 800-series PCH, including the Z890, H870, B860, and H810 series. The top motherboards will feature up to DDR5-6400 memory and the previous platform diagram revealed two additional SKUs with 6+8 and 6+16 configurations.

• Arrow Lake-S 8+16 (24 Cores / 32 Threads)
• Arrow Lake-S 6+16 (22 Cores / 28 Threads)
• Arrow Lake-S 6+8 (14 Cores / 20 Threads)

The new Intel 800-series desktop platform will support much higher memory speeds natively with up to 6400 MT/s mentioned in a dual-channel configuration. The CPUs will have native x16 PCIe Gen5 dGPU and x4 PCIe Gen5 M.2 lanes plus an additional x4 Gen4 PCIe lanes for M.2. Breaking down the CPU and PCH I/O, we have:

Arrow Lake-S CPU I/O Capabilities:

• DDR5 UDIMM/SODIMM – 6400 MT/s Native
• 1×4 eDP 1.4b
• DP2.0 UHBR20/HDMI 2.1
• 2x USB 4.0  + TBT4/DP
• 2.0/HDMI 2.1 Type-C
• 24 Total PCIe Lanes
• 20 PCIe Gen5 Lanes (1×16 + 1×4)
• 4 PCIe Gen5 Lanes (1×4)
• 8 SATA III lanes

ARL-S PCH For 800-Series Motherboards:

• DMI Gen4 1×8
• 24 Total PCIe Gen4 Lanes
• 6 x4 Controller (Max)
• 14 Root Port (Max)
• 8 SATA III lanes
• 3x GbE Ports
• 10 USB 3.2 Gen2 x1 Ports (Every two ports can be used as a single USB Gen 3.2 Gen2x2 port, max 4 supported)
• 14 USB 2.0 Ports
• 802.11ax R2 w/TDBC (160+80), BT6/WIFI7
• 1x CSME SPI
• 2 x TCH SPI

What’s interesting is that Intel’s Arrow Lake Desktop CPUs will feature 20 usable PCIe Gen5 lanes whereas AMD’s Ryzen 9000 Desktop CPUs will feature 24 usable PCIe Gen5 lanes. So AMD does have an advantage in the total number of Gen 5.0 lanes offered by the CPU. In terms of memory support, Arrow Lake CPUs will stick with DDR5-6400 native support while Zen 5 CPUs will stick with a DDR5-5600 native support.

Intel Arrow Lake-S Desktop CPUs will be heading to the next-gen LGA 1851 socket featured on 800-series motherboards with the following features:

• LGA 1851 Socket Longevity Planned Uptill 2026
• DDR5 Only Compatibility, No DDR4 Support
• Kicks off With 800-Series Motherboards
• Support For Up To DDR5-6400 Memory (Native JEDEC)
• Increased PCIe Gen 5.0 Lanes Through CPU & PCH
• Arrow Lake-S First Desktop Family Supported
• Arrow Lake-S CPUs feature 3 MB L2 Cache Per P-Core
• Arrow Lake-S CPUs feature refreshed Alchemist iGPUs
• Arrow Lake-S CPUs feature integrated LLC “Adamantine” for GPU Tile
• Arrow Lake-S CPUs feature 8+16, 8+0, 6+8 CPU SKUs
• Launching In 2H 2024

At Computex 2024, all of Intel’s motherboard partners unveiled their next-gen designs based on the Z890 PCH and the LGA 1851 socket. Although none of the manufacturers listed the boards as Z890 products, they are easy to tell since the labels were engraved on the heatsinks and IO plates. Following is our Z890 motherboard coverage from the event:

Intel’s Arrow Lake-S Desktop CPUs are positioned for launch for gaming platforms such as desktop PCs later this year (October) and will be competing against AMD’s Zen 5-based Ryzen 9000 “Granite Ridge” CPUs which land later this month (31st July). Stay tuned for more info.

Intel Desktop CPU Generations Comparison:

News Source: HXL (@9550pro)