X870E Nova Wifi cold boot code 0xd6

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   I have issue with X870E Nova Wifi. I'm on the latest BIOS ver 3.0
CPU: 9700x
RAM: 32GB Gskill trident Z, EXPO Enabled. 
PBO + Curve Optimizer: minus 20. 

The board occasionally does not boot and return 0xd6 code (cold boot). Referring to the manual, it is DXE_NO_CON_OUT error. Force shutdown then reboot > it boots up like usual. 

What does this mean ? How do I fix this please ? 

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Azura2910 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 24 Jul 2025 Status: Offline Points: 30	Post Options Post Reply Quote Azura2910 Report Post Thanks(0) Quote Reply Topic: X870E Nova Wifi cold boot code 0xd6 Posted: 24 Jul 2025 at 10:52pm
	I have issue with X870E Nova Wifi. I'm on the latest BIOS ver 3.0 CPU: 9700x RAM: 32GB Gskill trident Z, EXPO Enabled. PBO + Curve Optimizer: minus 20. The board occasionally does not boot and return 0xd6 code (cold boot). Referring to the manual, it is DXE_NO_CON_OUT error. Force shutdown then reboot > it boots up like usual. What does this mean ? How do I fix this please ?

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 27428	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: Yesterday at 3:18am
	DXE_NO_CON_OUT can be several things, including GPU not initialized/found, keyboard malfunction etc. You said only on cold boot, is that from a fully powered down state (power from the wall off) or simply a shut down state (power on from the wall but PC off)?


Azura2910 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 24 Jul 2025 Status: Offline Points: 30	Post Options Post Reply Quote Azura2910 Report Post Thanks(0) Quote Reply Posted: 22 hours 8 minutes ago at 4:14pm
	PC completely shutdowns overnight, boots up in the next morning then occasionally it returns this code. Everything is brandnew in this PC. The worst part is this error does not show up daily, maybe once every 3-4 days so I don't know what's the problem.

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 27428	Post Options Post Reply Quote Xaltar Report Post Thanks(0) Quote Reply Posted: 20 hours 32 minutes ago at 5:50pm
	I don't think it's cause for concern, likely a bug caused by an improper shut down caused by the OS but if you are concerned you can open a support ticket with ASRrock here and ask them to confirm. I have seen a few cases involving the D6 code here on the forums over the years one turned out to be a faulty GPU, another was a faulty PSU and another turned out to be a gaming keyboard that was causing a conflict. In all these cases however the issue was persistent and cause the system/s to fail to boot every time. It is possible it could be an intermittent fault but the fact it only effects a cold boot and works fine after a forced shutdown and reboot leans me more toward a software/firmware bug. Does using the reset switch also cause the system to boot normally again or do you have to press and hold the power button then power on again for it to come back to life?