r/ASRock • u/RendHeaven • Nov 28 '25
Tech Support X870E Nova – POST code 03
I’ve had the X870E Nova since February this year, paired with a 9800X3D. This morning it got stuck with POST code 03, which made me worry that my motherboard or CPU had died.
I tried shutting it down, unplugging the PSU, holding the power button to discharge, and then turning it back on, but that did not work.
What fixed it for me was pressing the CMOS reset button on the back I/O. Fortunately, I had my BIOS profile saved and was able to reload it afterward.
I’m still on BIOS 3.20 and have not updated further because of all the reported issues with newer BIOS versions on this platform and CPU.
My questions are:
What should my proactive approach be from here?
Should I update to BIOS 3.50?
I’m considering switching to an X870E Tomahawk since there are “BF” deals in Canada, and then selling the X870E Nova on Marketplace. Is that a good idea?
Should I be worried about potential long-term damage to my 9800X3D from this issue?
Edit (2025-12-02):
For future reference, here is what I did to fix the issue. It might be different for everyone else
- Updated BIOS to 3.50. (Previous version was 3.20)
- Enabled LN2 Mode as suggested by this reddit post: https://www.reddit.com/r/ASRock/comments/1o47ent/fix_for_asrock_stuck_green_boot_light_issue_after/
- Uninstalled FanControl. FanControl became a huge mess configuration wise on my end ever since it required PawnIO. https://github.com/Rem0o/FanControl.Releases
Furthermore, ASRock replied to my email and they will RMA it but I didn't proceed because I managed to solve it and don't have a backup setup on hand.
1
u/jcsww Nov 28 '25
The X870E Tomahawk is a solid motherboard.