B450 Pro4 WD Black 850X 1TB not detected
Printed From: ASRock.com
Category: Technical Support
Forum Name: AMD Motherboards
Forum Description: Question about ASRock AMD motherboards
URL: https://forum.asrock.com/forum_posts.asp?TID=113469
Printed Date: 15 Mar 2026 at 7:50am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: B450 Pro4 WD Black 850X 1TB not detected
Posted By: manushya
Subject: B450 Pro4 WD Black 850X 1TB not detected
Date Posted: 13 Mar 2026 at 2:31pm
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System Config: ASRock B450 Pro4 AMD Ryzen 5 3400G ADATA XPG Gammix D30 8GB X 4 Crucial MX 500 256GB WD Blue HDD 4TB WD Blue HDD 2TB Corsair CX450 PSU Corsair Spec Delta the system is not detecting WD Black 850X 1TB in either of the m.2 slots. there are no PCIe devices connected. Shared SATA ports are free. asrock website says this SSD is not compatible. http://www.asrock.com/support/qa/Technical%20NNotes%20-%20Storage%20Device%20Compatibility.pdf" rel="nofollow - www.asrock.com/support/qa/Technical%20NNotes%20-%20Storage%20Device%20Compatibility.pdf I WANT TO KNOW IF ASROCK HAS ADDED SUPPORT FOR THIS SSD IN THE BETA BIOS AVAILABLE FOR THIS MOTHERBOARD. I have not updated BIOS after ver5 as it is working fine. can i update to L8.02 (the stable / final one) without any issue? thanks. |
Replies:
Posted By: Xaltar
Date Posted: 13 Mar 2026 at 3:52pm
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You can updated to L8.02 yes, it should work just fine though I would update to 10.44 beta so you get the benefit of the updated secure boot certificates. Your 850x will need to go in the top (ultra M.2) slot. Your operating system must be installed in GPT mode (UEFI mode) or the drive will not be detected. Before updating BIOS or anything else I would recommend you try the following: 1. Disconnect all drives from the system. 2. Install only the 850x in M.2 slot 1 (ultra M.2) 3. Make sure CSM is set to disabled in your BIOS 4. Press F12 during the POST process to pull up your boot menu and see if the drive is listed. If your operating system is installed on an MBR partition (CSM enabled) you will need to convert the boot drive to GPT or reinstall the OS on a drive formatted to GPT. There are guides on how to convert on youtube/google with a bit of a search. As far as I know (I do not work for/speak for ASRock) the 850x should work in theory as it claims to be backward compatible with PCIe Gen3. Looking on various tech forums however it seems fairly common for this drive to not be detected on 400 series AM4 boards. I have seen a few accounts where users were forced to purchase a PCIe M.2 adapter card and it worked when connected to that. If none of this helps then you can try opening a support ticket with ASRock: https://tw.asrock.com/events/tsd.asp" rel="nofollow - https://tw.asrock.com/events/tsd.asp They may not be able to help though if the drive is considered unsupported. I hope this helps. ------------- 
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