Latency issues surrounding Intel's Core 200S series CPUs affect M.2 storage ports on LGA 1851 motherboards, leading to reduced performance. The SSD review reports that Arrow Lake CPUs have a bottleneck on the PCIe lanes dedicated to motherboard M.2 slots, causing a (roughly) 2GB/s bandwidth reduction compared to previous-gen motherboards when using the fastest and Best SSDs available.
The storage-focused review outlet initially discovered the flaw during testing when a 14GB/s-capable PCIe 5.0 SSD only achieved 12GB/s in an Arrow-Lake-based test rig. After reaching out to board makers and Intel, it was found that the issue is Arrow Lake-specific. The review outlet has been unable to confirm any Z890 motherboards operating PCIe 5.0 SSDs at speeds beyond 14GB/s, whereas previous-gen Z790 boards have no problem hitting the maximum speeds.
