WD Black SN850X showing as Gen2 on Asrock B660M-IT

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   I added a WD Black SN850X Gen4 NVMe to my machine. Motherboard is Asrock B660M-ITX/ac which supports Gen4x4 M2. Western Digital Dashboard is showing it as a "Gen2 (32 lanes). Firmware is up to date.

When doing backups over 10gbit to a Synology 1817+, I noticed that the drive wasn't any faster than the 4 SSDs I had installed. Running HDTune or other disk benchmarks also shows it as just a Gen2 speed.

What am I doing wrong?  It is not on the supported storage list.  Do I just need to hope for a bios update?

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sspeed Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 24 Oct 2023 Status: Offline Points: 35	Post Options Post Reply Quote sspeed Report Post Thanks(0) Quote Reply Topic: WD Black SN850X showing as Gen2 on Asrock B660M-IT Posted: 10 Dec 2024 at 1:54am
	I added a WD Black SN850X Gen4 NVMe to my machine. Motherboard is Asrock B660M-ITX/ac which supports Gen4x4 M2. Western Digital Dashboard is showing it as a "Gen2 (32 lanes). Firmware is up to date. When doing backups over 10gbit to a Synology 1817+, I noticed that the drive wasn't any faster than the 4 SSDs I had installed. Running HDTune or other disk benchmarks also shows it as just a Gen2 speed. What am I doing wrong? It is not on the supported storage list. Do I just need to hope for a bios update?

sspeed Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 24 Oct 2023 Status: Offline Points: 35	Post Options Post Reply Quote sspeed Report Post Thanks(0) Quote Reply Posted: 10 Dec 2024 at 2:14am
	This B660 board only has one M2 slot. The manual states: "The Hyper M.2 Socket (M2_1, Key M) supports type 2280 SATA3 6.0 Gb/s & PCIe Gen4x4 (64 Gb/s) modes. * Please be noted that if M2_1 is occupied by a SATA-type M.2 device, SATA3_0 will be disabled." Is this indication that this M2 slot is actually tied to the chipset vs the CPU? That might explain what I am seeing since I have 4 SSDs installed?