Z390 Pro 4 M.2 drive not showing in BIOS
Printed From: ASRock.com
Category: Technical Support
Forum Name: Intel Motherboards
Forum Description: Question about ASRock Intel Motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=113520
Printed Date: 21 Jul 2026 at 4:51pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Z390 Pro 4 M.2 drive not showing in BIOS
Posted By: oldretiredchief
Subject: Z390 Pro 4 M.2 drive not showing in BIOS
Date Posted: 21 May 2026 at 10:25am
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Hi I have searched the net for hours trying to find a bios update for Z390 Pro 4 Thanks Chief Vic |
Replies:
Posted By: oldretiredchief
Date Posted: 21 May 2026 at 10:27am
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Hi Am new here I have been unable to find a URL with an Z390 Pro 4 mother board bios update. I have looked for hours Thanks Vic |
Posted By: oldretiredchief
Date Posted: 21 May 2026 at 10:35am
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The reason I am asking this is because the Z390 Pro 4 does not see The M.2 drive i installed. Maybe there is just a setting to change and I do not have to risk bricking my MB with a flash. Thanks Vic |
Posted By: Xaltar
Date Posted: 21 May 2026 at 1:54pm
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Hi Vic, it's highly unlikely that your issue is BIOS version related but you can find all the available BIOS versions for your board here: https://www.asrock.com/MB/Intel/Z390%20Pro4/#BIOS" rel="nofollow - https://www.asrock.com/MB/Intel/Z390%20Pro4/#BIOS Before you go down the update route however try the following: 1. Make sure the M.2 drive is properly seated in it's socket. 2. Go into windows (assuming you have another boot drive installed) and check in "Disk Management" to see if your drive is showing there. a. Open Disk Management: Right-click the Start button (or press Windows Key + X) and select Disk Management. b. Initialize the Drive (if new): If the drive is brand new, an "Initialize Disk" window will automatically pop up. Select GPT (GUID Partition Table) as it is the modern standard, and click OK. c. Create a Simple Volume: Look at the bottom of the window for your new disk. It will be marked with a black bar indicating "Unallocated" space. Right-click this unallocated space and choose New Simple Volume. d. Specify Volume Size: The wizard will guide you; click Next. You can specify the size in megabytes (MB) or leave it at the maximum default to use the entire drive. e. Assign a Drive Letter: Click Next, and assign your preferred letter (e.g., D, E, or F) to the drive. f. Format the Drive: Select NTFS as the File System, leave the Allocation unit size to Default, and give the drive a name in the "Volume label" box (e.g., "Media Drive"). Ensure Perform a quick format is checked. g. Finish: Click Next and then Finish. The status will change to Formatting, and it will then be accessible in File Explorer. 3. If it is the only M.2 drive in your system make sure you install it in the top slot. The bottom slot shares resources with some of your SATA ports so if you have SATA drives connected it can conflict and not show up in BIOS/the OS. 4. Under "Boot options" in your BIOS make sure CSM is set to disabled. Most NVME drives require this setting to be disabled. CSM = Compatibility Support Module and it exists for old, legacy hardware. Almost no one uses any hardware that needs it anymore. Good luck. ------------- 
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Posted By: oldretiredchief
Date Posted: 21 May 2026 at 11:35pm
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Thanks - Messing with the bios is always scary. I have placed the M.2 in the lower slot and will move it to the top slot and see if it is recognized. It is formatted and has been recognized in an external M2 holder. Thanks again Will let you know how it went. ChiefVic |
Posted By: oldretiredchief
Date Posted: 22 May 2026 at 4:59am
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Hello I moved the M.2 to slot one. It did not recognize right away as I have read BUT is is visible now in disk management and I have copied files to it, so I guess I am NOT going to flash the BIOS, unless you all think it is a good idea. Cheers Chief Vic https://forum.asrock.com/smileys/smiley17.gif" rel="nofollow - https://forum.asrock.com/smileys/smiley17.gif |
Posted By: Xaltar
Date Posted: 22 May 2026 at 1:42pm
Awesome, glad to hear it  I tend to update my BIOS only when I actually need to, upgrading my CPU to a new one that requires it, critical security fixes etc. If it works, leave it be. -------------
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Posted By: oldretiredchief
Date Posted: 26 May 2026 at 1:08am
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Hi I did not flash the BIOS and all is running fine Thanks for the help. Take care Chief Vic |
Posted By: Xaltar
Date Posted: 26 May 2026 at 2:02am
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Glad I could be of help. You know where to come when you need help again -------------
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