Problems after X470 Master SLI AC BIOS 3.30
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=11788
Printed Date: 28 Jul 2025 at 11:25am
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: Problems after X470 Master SLI AC BIOS 3.30
Posted By: DackWallace
Subject: Problems after X470 Master SLI AC BIOS 3.30
Date Posted: 04 Jul 2019 at 2:42pm
Good afternoon everyone,
Yesterday, I upgraded my BIOS of my X470 Master SLI A/C to the latest version, 3.30, which went on without a hitch, but after flashing, the BIOS restarted twice before booting into my loader for Windows and Linux, which it's never done before after previous BIOS updates. Now, any time I power down my computer and cut power, I have to clear my CMOS or else the POST gets frozen at code A0. So I clear the CMOS and reboot, and everything is fine until the power is cut off (the computer reboots fine as long as it's just restarted.) Does anybody know what's going on? I even tried re-flashing 3.30, which made no difference. I'm stuck clearing my CMOS every time I shut off my computer.
Any help is appreciated, thanks.
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Replies:
Posted By: DackWallace
Date Posted: 05 Jul 2019 at 7:54pm
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I've tried re-flashing again, but no cigar. Every time I power off the system (not restart), I have to clear the CMOS again and reset the BIOS settings, as the system still freezes at POST with code A0 displayed on the lower right-hand corner.
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Posted By: Ray62
Date Posted: 06 Jul 2019 at 1:49am
Does it appear after shutdown with Windows and Linux too?
BTW: A0 - IDE initialization is started
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Asrock Fatal1ty X370 Professional Gaming Offline
Under test:
MSI X570_MEG_ACE | AMD Ryzen 9 3900X | Scythe Mugen5 | 2x16GB F4-3200C14D-32GTZ@3466 | ASUS GeForce GTX 1080 Ti FE
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Posted By: Ray62
Date Posted: 06 Jul 2019 at 1:56am
Hmm, A0 could be a drive timeout failure.
Did you try to make a reset (Not CMOS clear) or push the powerbutton for some seconds (from the mainboard) when stuck at A0?
And you should list all your components...
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Asrock Fatal1ty X370 Professional Gaming Offline
Under test:
MSI X570_MEG_ACE | AMD Ryzen 9 3900X | Scythe Mugen5 | 2x16GB F4-3200C14D-32GTZ@3466 | ASUS GeForce GTX 1080 Ti FE
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Posted By: DackWallace
Date Posted: 07 Jul 2019 at 7:47am
So my main drive is an M.2 SSD, I also have a SATA SSD and a SATA hard drive, the latter of which I tried disconnecting with no luck (it still freezes at A0). The only way to power down once it freezes is by holding the power button until it shuts off, as it's totally unresponsive. Once I clear the CMOS, it starts up, reboots at POST, and then POSTS again and I can get into my loader (which is on the M.2 SSD), which never happened before the 3.30 update.
My components are:
Asrock x470 Master SLI/ac with BIOS 3.30
AMD Ryzen 5 2600
Gigabyte Geforce GTX 1060 6GB
2x8GB Corsair dual channel DDR4 2666
XPG M.2 2280 PCIe SSD 480GB
Samsung 860 EVO V-NAND SSD 500GB
A shucked 10TB WD Easystore (tried with and without this connected, no change)
Corsair K70 LUX keyboard
Asus ROG mouse
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Posted By: Ray62
Date Posted: 07 Jul 2019 at 6:05pm
But what about Linux?
If you do a shutdown by Linux, switch off, on and restart the PC, is the "A0" stuck also given?
If yes, check the "Fast Start" option on windows 10 shutdown and disable it, if it is enabled.
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Asrock Fatal1ty X370 Professional Gaming Offline
Under test:
MSI X570_MEG_ACE | AMD Ryzen 9 3900X | Scythe Mugen5 | 2x16GB F4-3200C14D-32GTZ@3466 | ASUS GeForce GTX 1080 Ti FE
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