https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Fri, 10 Apr 2026 13:13:51 +0000 Tue, 01 Apr 2025 18:01:04 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=104684 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=104684&PID=189139&title=c5-error-in-led-on-boot#189139 Author: Xaltar
Subject: 104684
Posted: 01 Apr 2025 at 6:01pm

Thanks NDRE28, you are correct. The issue is most likely related to the RAM.

Try reseating the RAM and ensuring it is fully seated in the slot. On new boards
the slots can be very tight and seem like they are seated but actually still need
to go in a bit further.

Good luck]]> Tue, 01 Apr 2025 18:01:04 +0000 https://forum.asrock.com/forum_posts.asp?TID=104684&PID=189139&title=c5-error-in-led-on-boot#189139 https://forum.asrock.com/forum_posts.asp?TID=104684&PID=189137&title=c5-error-in-led-on-boot#189137 Author: NDRE28
Subject: 104684
Posted: 01 Apr 2025 at 11:24am

Hi!

Both C15 & C5 are related to memory issues.
C15 = Memory training.
C5 = Memory incompatibility.

I have dealt with C5 too.
I had a very niche memory kit, and it would give me error C5.
What worked for me was putting both RAM DIMMs in channel B (B1 + B2), however that means that it will run in single-channel mode.

You can try this setup to see if you can boot with it.

In my case, I've ended up RMA'ing the RAM kit.

I hope this helps...]]> Tue, 01 Apr 2025 11:24:02 +0000 https://forum.asrock.com/forum_posts.asp?TID=104684&PID=189137&title=c5-error-in-led-on-boot#189137 https://forum.asrock.com/forum_posts.asp?TID=104684&PID=189117&title=c5-error-in-led-on-boot#189117 Author: M440
Subject: 104684
Posted: 31 Mar 2025 at 9:59pm

what does your mb manual says about this code?]]> Mon, 31 Mar 2025 21:59:27 +0000 https://forum.asrock.com/forum_posts.asp?TID=104684&PID=189117&title=c5-error-in-led-on-boot#189117 https://forum.asrock.com/forum_posts.asp?TID=104684&PID=189104&title=c5-error-in-led-on-boot#189104 Author: sys_builder
Subject: 104684
Posted: 31 Mar 2025 at 8:21pm

I have reseated the cpu and graphics card. The pins look ok.]]> Mon, 31 Mar 2025 20:21:44 +0000 https://forum.asrock.com/forum_posts.asp?TID=104684&PID=189104&title=c5-error-in-led-on-boot#189104 https://forum.asrock.com/forum_posts.asp?TID=104684&PID=189103&title=c5-error-in-led-on-boot#189103 Author: sys_builder
Subject: 104684
Posted: 31 Mar 2025 at 8:19pm

Hi,

I have
Motherbard - PHANTOM GAMING X870E Nova WiFi(3.10 bios)

CPU -9800X3D
Ram: GSkill - F5-6000J3036G32GX2-TZ5NRW
Case: Lian-li O11 dyanmic evo

The system stops briefly at code 15 and stops completely at C5 afterwards. This is in combination with different memory slots. Without RAM, it errors AA.
According to GSkill, this board is supported for this RAM.
Front Panel controls also do not work.

Thank you]]> Mon, 31 Mar 2025 20:19:07 +0000 https://forum.asrock.com/forum_posts.asp?TID=104684&PID=189103&title=c5-error-in-led-on-boot#189103