M.2 not recognized by B450M Pro4

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   Hi all,

I'm putting together a build with the Mobo listed in the title and trying to install Windows on and boot from a Crucial MX500 500GB 3D NAND SATA M.2 Type 2280SS. However the drive will not show up in BIOS nor in Windows installation as a drive to install the OS on. The activity light for the drive is on, but I can't seem to get it to show up despite trying some BIOS tweaks recommended in other posts.

I'm a noob when it comes to M.2 drives, so I apologise if I have missed something obvious, but would love to get this resolved and have the machine up and running. Any help is very appreciated!

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RudgeMan Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 02 Mar 2019 Status: Offline Points: 4	Post Options Post Reply Quote RudgeMan Report Post Thanks(0) Quote Reply Topic: M.2 not recognized by B450M Pro4 Posted: 02 Mar 2019 at 12:51pm
	Hi all, I'm putting together a build with the Mobo listed in the title and trying to install Windows on and boot from a Crucial MX500 500GB 3D NAND SATA M.2 Type 2280SS. However the drive will not show up in BIOS nor in Windows installation as a drive to install the OS on. The activity light for the drive is on, but I can't seem to get it to show up despite trying some BIOS tweaks recommended in other posts. I'm a noob when it comes to M.2 drives, so I apologise if I have missed something obvious, but would love to get this resolved and have the machine up and running. Any help is very appreciated!

xhue Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 17 Aug 2018 Status: Offline Points: 634	Post Options Post Reply Quote xhue Report Post Thanks(0) Quote Reply Posted: 02 Mar 2019 at 4:52pm
	That is strange. Here is what I recommend. Update BIOS to 2.00 and clear CMOS afterwards. If this doesn't help, do a complete rebuild of your system from scratch. Clear CMOS once again and see what happens.

RudgeMan Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 02 Mar 2019 Status: Offline Points: 4	Post Options Post Reply Quote RudgeMan Report Post Thanks(0) Quote Reply Posted: 03 Mar 2019 at 4:16am
	Should have cleared this but my SSD was a SATA and I had it in the PCIE M.2 slot. Thanks for the reply!

xhue Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 17 Aug 2018 Status: Offline Points: 634	Post Options Post Reply Quote xhue Report Post Thanks(0) Quote Reply Posted: 03 Mar 2019 at 5:46am
	If your mobo manual is to believed, the SSD should go in M.2_2, as this M.2 slot is for SATA devices. The first one is for NVMe.