X399 Fatal1ty issue
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=14406
Printed Date: 09 Aug 2025 at 10:02pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com
Topic: X399 Fatal1ty issue
Posted By: pms
Subject: X399 Fatal1ty issue
Date Posted: 16 May 2020 at 8:32am
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Hi, I recently noticed that my +12V rail is very very low (completely out of norm) and the values in the picture below are similar to the ones in the BIOS.  Since then, I've tested a lot of stuff: -different bios versions (P3.60, P3.70 and P3.80= -different PSUs (seasonic prime 850W platinum (the original one) and seasonic focus 1000W -different VGAs (asrock 5700 and RTX 2060 super) -removed all SSDs/HDDs, fans, and disconnected peripherals -reinstalled the CPU BUT didn't detected any difference in +12V rail (always around 8.9-9.1V) Nonetheless, I can easily run stress tests and all sort of apps, apparently, without power issues. So, my question is if any of you have seen a similar behavior ? Any hints to try to solve this issue will be highly appreciated. I think it might be the related sensor that is bugged or something but.. |
Replies:
Posted By: Xaltar
Date Posted: 16 May 2020 at 4:15pm
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Could be a bad sensor. My X399 Phantom Gaming 6 is running within spec (in BIOS, ASRock APP and CPUID HW Monitor). I also have the latest BIOS and have updated with every new BIOS version since I got the board. I would give the 12v rail a check with a multi-meter. I highly doubt 2 PSUs have the exact same problem though. You can try do a full CMOS clear (pull power, pull battery and let sit for an hour). That will reset the RTC and other deeper settings. It could just be a bit of corrupt data that isn't clearing. ------------- 
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Posted By: pms
Date Posted: 17 May 2020 at 6:22pm
Thanx for the tip. Actually, I've already done multiple CMOS clears without any improvement  I also tested the PSUs in other rigs and they work just fine (all rails ok). Furthermore, today I tested another PSU from a different brand (silverstone) and the poor/abnormal +12V rail behaviour was similar. At this point I think I'll RMA the motherboard...with the current restrictions just hope not being "waiting for godot" |
Posted By: pms
Date Posted: 17 Jun 2020 at 1:34am
Can anyone share how long (+/-) it takes a motherboard RMA in Europe? I've sent my X399 Fatal1ty to RMA one month ago and still didn't have any feedback 
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