Powerspec B940 multiple random BSODs

ironlemon

Hello Team,

I'm at my wits' end. Since November 2022 I have a Powerspec B940 (to which I added a GTX 4080, a better PSU and a couple of SSDs/HDDs) and it's been running smooth, stable and always fully updated until recently. For the past couple of weeks I've been getting BSODs of all sorts, mostly when running applications scanning or accessing directories with large amount of files/subdirs - DRIVER_OVERRAN_STACK_BUFFER, SYSTEM_SERVICE_EXCEPTION (these two happening the most often by far), KMODE_EXCEPTION_NOT_HANDLED, even one CLOCK_WATCHDOG_TIMEOUT today (and different modules crashing at that, too: luafv.sys, fileinfo.sys, ntfs.sys, fltmgr.sys, ntkrnlmp.exe...). Some days I would even get these every 5-10 minutes when idling.

I got this machine mostly for Microsoft Flight Simulator and what's interesting about the BSODs is that they never appear when I'm running MSFS 2024 - I could have a 10-12h flight running that's hammering the CPU and GPU and it's 100% stable all the way through (hell, I’m even running a flight now and it’s been 3 hours and counting). All of the problems happen in Windows, either when idling, running mundane File Explorer tasks or checking for updates with one of my MSFS 3rd party DLC stores (Orbx Central, etc.). I also started noticing random crashes of .NET based applications (clr.dll) - random as in they’re rarely reproducible and an app that just crashed can easily work fine on the 2nd try.

At this point I tried just about everything:

1. Tried running DISM and SFC multiple times.
- SFC never completes in "regular" windows, always gives me "Windows Resource Protection could not perform the requested operation." at any random point between 4% and 96%. I did manage to complete it in both Windows RE an Safe Mode and all it did was correcting the same bluetooth driver with every run (I think it's a known non-issue from what I read?).
- DISM is either failing on me with Error 1726 or completing the operation but saying the repair components could not be found.
- Windows Updates still install normally and I'm at the latest available version.

2. Ran full-repair chkdsk on every drive I have. No issues found.

3. Ran full SSD/HDD diagnostics using tools I have for my relevant drives (Samsung Magician, SanDisk Dashboard). No issues found.

4. Ran Memtest86 and Windows Memory Diagnostics. No issues found.

5. Ran multiple OCCD stress tests. No issues found.

6. Did a clean install of the latest NVidia driver using DDU in Safe Mode. I did have a problem here with the NVidia installer failing to unpack multiple times before it went through but eventually it did.

7. Removed all bloatware I previously installed for my hardware (Razer Synapse, MSI Center, Dell Display Utilities).

8. Checked all drivers and .NET components for updates.

9. Restored BIOS defaults and applied Intel Default Settings for CPU power limits and default XMP profile, as per Powerspec recommendations from this forum. I never did any overclocking anyway and kept everything at Powerspec factory settings. I did install the latest BIOS from the forum months ago when it first released and never had problems with it until now.

Nothing helped so that (admittedly - at ChatGPTs suggestion...) pointed me back to the system itself and the stack corruption. I did try to also run the in-place repair from both ISO and Windows Update but both fail with unspecified errors at random points in time.

What else can I check? Is it still possible it’s a hardware failure even if the stress tests return nothing?

System specs and components I added that were not included in the stock Powerspec B940:

Windows 11 Pro 24H2 compilation 26100.6584

ASUS ROG STRIX 1000 Watt 80 Plus Gold ATX PSU

MSI NVIDIA GeForce RTX 4080 Gaming X Trio
Samsung SSD 990 PRO 4TB (system drive)
Samsung SSD 980 PRO 2TB
Samsung SSD 860 EVO 2TB
Seagate ST2000DX001-1M164 2TB
(I still have the included WD Blue SN570 2TB as well)