Hey all, hoping someone can help me figure this out. Built a new PC recently and it’s been a nightmare of random BSODs and restarts. Sometimes it lasts 5 hours, other times it crashes a few minutes after login — even Safe Mode and Windows setup crashed mid-install. I’m a software engineer but mainly have used prebuilts so this is my first venture into building and troubleshooting hardware issues like this. In general i really just want to narrow down what the issue might be so if I need to RMA some components like the MoBo, CPU, or PSU (my highest suspicions atm) I can do that before the return window closes. Any help would be greatly appreciated!!! Here’s the full breakdown… # System * **CPU:** AMD Ryzen 7 9800X3D
* **Motherboard:** ASUS TUF GAMING B850M-E WIFI (AM5)
* **GPU:** Gigabyte RTX 5070 WINDFORCE OC SFF 12 GB
* **RAM:** 64 GB (TEAMGROUP T-Create Expert DDR5-6000 CL30, 4×16 GB – also tested 1×16 GB)
* **Storage:** Samsung 990 Pro 2 TB (OS), Samsung 990 Plus 4 TB
* **PSU:** Corsair SF1000
* **Case:** Lian Li A3 mATX
* **Cooler:** Thermalright Peerless Assassin 120 SE
* **OS:** Windows 11 Pro # Symptoms * Stable for hours at first, then frequent BSODs.
* Stable in BIOS and at Windows login screen indefinitely.
* Crashes right after Windows login (1–5 min typical).
* Safe Mode also BSODs.
* Seen BSODs: * WHEA\_UNCORRECTABLE\_ERROR * DPC\_WATCHDOG\_VIOLATION * MEMORY\_MANAGEMENT * CRITICAL\_PROCESS\_DIED * DRIVER\_IRQL\_NOT\_LESS\_OR\_EQUAL * KMODE\_EXCEPTION\_NOT\_HANDLED * SYSTEM\_THREAD\_EXCEPTION\_NOT\_HANDLED * HYPERVISOR\_ERROR
* Temps are fine, fans and device detection look normal.
* Ive tried plenty of tests like MemTest86, Prime85, MemTestHCI, CrystalDiskMark, and 3DMark and can’t get it to crash from tests alone. I’ll often try something new, think it’s fixed then hours later I get a crash – when it crashes once it tends to crash consistently on login after that. # What I’ve Tried * Reseated CPU, cooler, GPU, all power cables.
* Tested 1 DIMM in A2, EXPO off, even downclocked RAM.
* MemTest86: 3 passes, 0 errors.
* Removed 4 TB NVMe and reinstalled Windows to 2 TB drive → still crashes.
* Updated BIOS (v1087) and reset to defaults.
* Reseated power cables, removed EPS extension, tried different outlet + cord.
* chkdsk + sfc /scannow offline → no issues found. # Current Suspicions 1. **PSU instability** (unit, modular socket, or cable)
2. **Motherboard defect** (VRM, DIMM, PCIe, or M.2 signaling)
3. **CPU defect** (possible but lower probability) If anyone has ideas for next diagnostic steps — I’d appreciate the insight. I’m close to just returning my motherboard, PSU, and CPU and hoping my next ones don’t have issues…. Minidumps are here: Dropbox link to .dmp files
Why a hypervisor error? That tells me you may need to enable the hypervisor features in the BIOS, but it also tells me this is not a standard install. Maybe recreate your install USB?
I was surprised to see that one as well. Nothing fancy here, just a standard and fresh OS install. I did create a 2nd install USB fairly early in my troubleshooting, and stripped the build down to it’s necessities and reinstalled Windows. It ran for quite a while, long enough to get my hopes up, but alas started crashing again 🙁
Try installing on the 4tb drive in the second m.2 slot to rule out the other m.2 slot and pcie5 drive