I have a strange rebooting issue in my newly purchased PC. When I turn on the system, it starts normal and without issue. Once I need to reboot it “restart” for any reason like update windows or download a file …. etc, my asus Rog Strix X870E-E Motherboard shows code “0d” and stuck without booting and even bios cannot be reachable. In this case, I need to force shutdown and restart again in which everything will be fine. If I want again to restart it from windows, the same thing will happen.

System specs:
Ryzen 9 9950x, 64GB Ram
Asus Rog Strix X870E-E gaming wifi
Asus Tuf RTX 4090
Windows 11 in M.2 NVMe

Things I made with no improvement:
* Bios update.
* Bios at default settings.
* Windows 11 installed
* Asus Armoury Crate deleted.
* RAM sticks removed and install back in slots 2 and 4.

By the way, once the system starts, it is very stable even under stress conditions.

Any advice for such strange reboot behavior??

Thanks

***********************************************************************************************

Update….. problem solved “temporary …!!!”

After scanning most of the possible reasons at least based on my level of knowledge in this regard, I found the situation must be around the DDR5 DIMM “RAM slots”. Asus Rog Strix X870E-E motherboard has 4 RAM slots. Initially, slot 2 and 4 were engaged with 32GB RAM each “total 64 GB RAM”.

I changed the RAM positions from slot 2 and 4 to 1 and 3 and no progress. Code “0d” came just immediately after the first restart from Windows and rebooting failed.

I changed to new 32x2 GB RAMs but with no progress. Code “0d” came just immediately after the first restart from Windows and rebooting failed.

Then a crazy idea came to engage all the 4 slots with 32x4 GB RAMs “total 128 GB RAM”.

OK, I know this would be crazy but just let us try. After having the first PC turn on, the motherboard took about 10 minutes to boot and initialize RAMs “remember; all the 4 slots are engaged now”. At this time; a new code came “15” which is the pre-memory system initializing code. After about 10 minutes, the system booted smoothly. Now, it is the time to start the test. I restated the PC from Windows to see if code “0d” will come again. Guess what… the system rebooted very smoothly without “0d”. I repeated the restart process from Windows every 15 minutes and rebooting was just perfect. The most important observation is that: the motherboard Q-Code LED behaved totally differently and quickly with 4 slots RAM engagement.

Since more than 4 hours with PC restarting every 15 minutes, code “0d” just disappeared and the rebooting issue resolved.

I do not know what exactly happened and why motherboard behaved differently with 4 slots RAM. I know 128 GB RAM is just a crazy number from gaming “might be great for content creation”, however, the situation is resolved.

Having that said, still it might not be worth it to engage 4 slots RAM to resolve the rebooting issue in this “high end… !!!” motherboard. I believe ASUS must look into this issue and provide more robust solution.

Tig