Good evening, I just bought an Alienware x17 R1 with the 1TB Samsung PM9A1 SSD.

The disk is installed in Slot 0 (primary). As far as I know, this SSD should be PCIe 4.0 and reach speeds of around 5500mb/s. And, again based on my informations, this notebook should support PCIe 4.0 on both M.2 slots.

Instead, the Intel RST software says that is connected to a 4000mb/s link and in benchmarks it reaches a maximum of 3500mb/s, which is the speed a pcie 3.0 SSD.

If I set  "AHCI" instead of "RAID" into the bios, Crystaldiskinfo indicates the ssd as a PCIe 3.0 SSD. Is there something I'm missing? The rest of the specs: 11800h + 32GB 3200MHz + RTX 3080. Thank you.