B550 won't post after bios update/enabled XMP
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=17129
Printed Date: 19 Jul 2025 at 7:34am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: B550 won't post after bios update/enabled XMP
Posted By: LilD
Subject: B550 won't post after bios update/enabled XMP
Date Posted: 31 Oct 2020 at 1:45am
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Hello, did a bad thing and I'm in a pickle. . I have a B550 Taichi. Was on most recent bios with XMP enabled without issue. 1.30 Flashed to new bios 1.50 today (USB) , booted to Windows fine. Went back into bios to enable xmp and now I have a major issue. PC will not boot. Post code error is 07. Looked up error code and it's a memory issue so how can I get back to booting my pc? I was on 1.30 beforehand and XMP worked! Taichi mobo has reset button. Does this help me? How do I go about diagnosis and fixing? I've submitted a support ticket and also to a few pc help subbreddits. Can I instant flash 1.3 bios from startup? This is my first Pc build and up to now, I've had no problems. Just would like to roll back to 1.30 and get my pc booted. I feel so dumb, any advice appreciated. I should have just left it alone because, again, was working great with 1.30 XMP enabled. Thank you 3700x RAM is Gskill F4-3600C16Q-32GTZN |
Replies:
Posted By: Xaltar
Date Posted: 31 Oct 2020 at 2:33am
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With the PC turned off, press and hold the clear CMOS button on the rear IO panel for 3 seconds or so then release it and try powering back on. As for flashing the BIOS back to 1.3, I typically recommend against back flashing with Ryzen. Once you are able to boot again go back into the BIOS, enable XMP then manually set your RAM speed to 1 step lower than the XMP default. If the system POSTs and boots after that you should be good to go, if not, clear CMOS again and lower it 2 steps. By step I mean from 3200 to 3000 or whatever is one speed slower. ------------- 
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Posted By: LilD
Date Posted: 31 Oct 2020 at 2:55am
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Thanks. I went ahead and cleared cmos button successfully and it booted right back up. Flashed back to 1.30 and XMP profile is enabled. |
Posted By: Xaltar
Date Posted: 31 Oct 2020 at 3:07am
Glad to hear it  Just a little tip, if your system is working correctly and you have no issues, don't update your BIOS  There is never any benefit to an update on a fully functional system. Now if your RAM isn't properly supported on your current version or the update includes a critical security update (it will be noted as such in the description), then it is worth doing. -------------
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Posted By: LilD
Date Posted: 31 Oct 2020 at 3:48am
Yes, it will stay right where it's at  The red text made it quite clear. I was foolish thinking new must mean better. |