Question Seeking advice on hard reboot issues with new PC build ?

[bill_i_am1]

Hi all,

I recently built a new PC and have been facing crashes and stability issues. Here are the specs:

• CPU: AMD Ryzen 9600X
• CPU Cooler: Thermalright phantom spirit
• GPU: PNY RTX 4070 TI Super
• PSU: Corsair RM1000x (2021)
• RAM: Corsair vengeance 6000mhz CL30 32 (2x16) GB
• SSD: Kingston KC3000 2TB

TL;DR: Initial stability tests passed, but crashes in games led me to rerun tests. Can't pinpoint which component is causing the issue.

Troubleshooting steps taken:

• Verifying all power connections
• Reinstalled drivers using DDU method (stable and latest versions)
• Tested with and without EXPO enabled
• Swapped in an old, working GPU, also tested with the iGPU
• Ran stress tests: OCCT suite, FurMark, MemTest86/86+, TestMem5 (Extreme1 @ anta777), Prime95 etc.
• Tested RAM sticks individually
• Monitored voltages/temperatures during crashes (all within safe ranges).

Quick timeline:

1. PC passed initial stress tests (OCCT suite, FurMark) and was stable during ~10 minutes of light gaming
2. Stable for a week of non-gaming use
3. Consistent crashes began in games (RoR2 after 2-5 min; Hades after ~15 min), requiring hard reboots
4. Stability tests (OCCT CPU+RAM, Prime95) began failing after 2-5 minutes, even when using iGPU
5. Further testing revealed mixed results, with occasional stability in longer tests.

Unfortunately, I don’t have easy access to spare parts (besides a GPU) for further testing. I’ve documented my latest findings here: https://docs.google.com/spreadsheets/d/1qLT_-z6acyglI1833T2929H1Bwgmd-t2_nftuColdDc/edit?usp=sharing and will update it as I go. (Hard reboot is not as prevelant in latest tests, but was the main crash cause for the majority of the tests)

Quick breakdown/my thoughts:

• PSU:
  • Reputable and new
  • Crashes occur across GPUs and even on iGPU (Sometimes withstand high power, sometimes crashes at lower power draw)
  • Crash type often attributed to PSU not being able to deliver enough power
• RAM:
  • Passed many RAM specific tests (Memtest86/86+, TestMem5 Extreme1 etc.) with no errors consistently
  • Individually survived 8 hours of prime95 at some point
  • Conflicting results in Prime95: crashes early in some runs but survives long sessions in others.
• CPU:
  • Passed extended Prime95 and OCCT CPU Extreme in some runs.
  • Second in line to be blamed for other Prime95 crashes if not RAM
• MOBO:
  • Could possibly contribute to instability with RAM or CPU?
• General / Whole system
  • Passed extended OCCT Combined and Prime95 runs during some sessions.
  • Stable when not gaming or testing

Additional information

• Main crash type: Hard reboot (screen goes black, sound continues for 1-2 seconds, then system reboots).
• Event Viewer Logs: Often implicate other drivers (e.g., NVIDIA, Realtek) but consistently show volmgr and Kernel-Power errors.
• There were times where GPU wouldn't post into windows, only into BIOS, including not posting at all for a little bit. Reseating GPU, cables and RAM seemed to fix it.

Any help would be much appreciated, happy to provide any more information as needed. Thanks!