AMD Motherboards - taichi x399 does not post

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taichi x399 does not post

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=9034
Printed Date: 31 Oct 2025 at 3:41pm
Software Version: Web Wiz Forums 12.04 - http://www.webwizforums.com

Topic: taichi x399 does not post

Posted By: Bear
Subject: taichi x399 does not post
Date Posted: 27 Jun 2018 at 7:06pm

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Hello everyone!

Built a system using taichi x399. All components are brand new. Removed everything except the cpu and cooler & removed the board from the case for debugging. 24 pin is connected & power cable for cpu cooler is connected. If to believe the sticker on the board then fw is 1.5

I get the following symptoms:

a) both 8 pin and 4 pin cpu cable connected - the psu clicks when i try to turn on the system and that's it. No fans. Nothing. No further attempts possible until psu has been powered off / on again. Sounds like a short circuit protection mechanism kicking in if you ask me but then again, I'm no expert.

*4 pin connector is connected with the latch on the right.

b) just 8 pin connected - fans start, debug display stops at c0 and a reboot cycle starts. As I understand, this is perfectly normal as this board requires both 4 pin and 8 pin? I have read contradicting statements about it though, so any further information is most welcome.

Both cables are cpu cables as far as i know i.e 8pin-2x4pin

What should I try next? Sounds like a problem with the cpu or socket but i really wouldn't want to remove the cooler & cpu before I have ruled out other options.

It's my first build so I suppose we should consider all possible rookie mistakes

Replies:

Posted By: Bear
Date Posted: 03 Jul 2018 at 9:31am

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Conducted some additional tests.

1) Tested the PSU with another system to make sure it could handle some load. Seemed to work OK.

2) Removed the CPU from the board. With all the power cables & the cpu fan connected I get nothing from the board except the fancy leds. No dr debug codes, no cpu (liquid cooling) fan. Is this normal or should I assume the board is the culprit?