New AMD AM5 rig reboots after x hours/days in Windows

wilson

wilson

wilson

Associate
Joined
30 Aug 2004
Posts
57
I’ve just built a new PC that reboots unexpectedly. No BSOD. Nothing useful in event viewer, on boot I see “The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly.”
Longest uptime is around 2 days, worst a couple of hours.
I cloned my Windows 10 partitions 0.5TB from SDD to the new NVME and upgrade to W11. 1st time with Gparted in linux (didn’t work). 2nd time with Acronis True Image in win10. I do plan to boot into the old environment as a test.

I’ve caught it twice rebooting. Only had Chrome/FF open, Vmware VM running linux. Outlook was downloading 40k odd emails via IMAP (weird they were not migrated), CPU was around 25%:
  1. CPU shot up to 90% (was running NZXT cam), mouse pointer was only visible around 2/10th each second as I moved it. 20-30 seconds later system rebooted.
  2. Desktop was visible, I moved mouse (no pointer that I could see). Bashed caps lock a few times, after several seconds the lights changed on kbd. Then system rebooted.
These crashes were around 2 hours of uptime when I first installed WIN11, the only time when there was any meaningful load. Other reboots were around 1 – 2 days of uptime, with system being idle. One reboot occurred with Outlook not running.

Tests done:
  1. Ran “sfc /scannow” & “DISM.exe /Online /Cleanup-image /Restorehealth”, the later fixed somethings.
  2. Memtest86, single run took around 15 minutes. Passed.
  3. Prime95, running 70 minutes now, CPU=100% at 57oC. CPU Power started at 60W and has increased to 73W. Writing this text in Outlook, downloading files. Browsing web, everything is very responsive.
  4. Heaven v4 benchmark. Ran for 15 minutes or so clean, GPU started to get rather warm.
  5. Crystal Disk Info, just ran all the tests with default settings. Took less then 10 minutes.
Rig: Asrock B850 Riptide, 7800X3D (AIO cooled), CORSAIR VENGEANCE DDR5 (2x16GB) 6000MHz CL30 (CMK32GX5M2B6000Z30) in DIMM1 (Chan A+B), CORSAIR RM750e (2025), Bootdisk = WD 4TB SN850X (this was 2nd hand (unknown owner) with 3 hours of use). Nvidia 3070 (recycled from old rig). Case = LANCOOL 217.
No overclocking, voltage at stock.
CPU 2xATX12V 8 PIN connected to PSU. GPU 2x 6+2 PIN connected to PSU.
AMD chipset drivers updated, no unknown devices in device manager. Latest Nvidia GPU drivers.

The mouse/kbd issues remind me of interrupt problems of a distant past. Whist I carry on trying to rule things out I wondered if the enlightened people had any ideas? Any idea to increase logging which might give a clue what the issue is?
 
Good point, no. Will update, it does:

Update AGESA to ComboAM5 1.2.0.3e Patch A for upcoming CPU compatibility.
1. Updated AGESA to ComboAM5 PI 1.2.0.3d.
2. Optimize PBO settings.
3. Correct T-sensor (Header) behavior.
 
Try running the RAM at stock rather than XMP / DOCP and disabling PBO. Also try uninstalling NZXT Cam.
 
Sounds to me like a software or driver issue from what you've described. Maybes try and reinstall / repair over the top any 3rd party apps you are running.
 
Thanks for the support. BIOS updated, which in turn reset everything to default. PBO disabled (default is auto). I did note NZXT cam was running I think for all reboots and did plan on disabling it, but I've removed it instead. Fingers crossed.
 
I tried to edit last post with my uptime, but don't see how. Uptime is looking good so far ................
C:\Users\wilson>SystemInfo | grep -i boot
System Boot Time: 05/07/2025, 14:35:34
 
A few months ago I had a purge of 3rd party bloatware and craplications. So razer software, lg software, corsair software, etc. it also took some time to actually clear left over remnants as well from registry and ghost services. But since then things have just been vastly improved.
 
Can you confirm your issue did not come back? I have a somewhat similar issue to you (lagging mouse and restart) and WD 4TB SN850X is the only common component between our systems. I am also on AM5 so could be BIOS after all but wanted to eliminate WD 100%. Searching that give quite a few topics with people using that drive and having boot issues etc.
 
Sorry to hear about your problems, I know how frustrating it is. I've had no further issues for around 30 days. 4 days ago I reactivated PBO.
 
wilson said:
I consider this to be fixed now. I've been running at ram at 3000MHZ at 30-36-36-76 (EXPO setting) for 12 days no issues.
I'm guessing the BIOS update fixed my original issue.
Click to expand...
Yeah probably a poor original BIOS.

I'd wager that your biggest issue was an incorrect default voltage setting for the RAM and SOC.
 
Spoke to soon, it restarted early hours this morning. If the issue happens only once a month I could live with it.
The EXPO profile has the voltage listed as 1.4V, HWiNFO shows VDD (SWA) avg at 1.406V. Not sure what you mean by SOC voltage.
 
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