Ok, I've removed the back cover and I found that I have the "KG5N3 Samsung PM9A1 1TB SSD, PCIe Gen3 NVMe 2280 MZVL21T0HCLR-00BD1". So, the speed is normal. I've also installed a new Sabrent pci-e 4.0 ssd into the primary slot, where previously there was the samsung installed, and now I get 7000mb/s.Now I have to find an ssd heatsink compatible, I'm in Italy, I don't know where I could find the original. Thanks guys.
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.
x17 R1, PM9A1 SSD, no PCIe 4.0?