Hi All,
My PC will intermittently "reset" itself when idle or under low load. By idle or low load, I mean no running applications or perhaps only running a web browser. By "reset", I mean it appears to have the same behaviour as if I had push the reset button. This occurs in Windows or Linux. If I run anything that loads at least 1 thread e.g. running a single thread of prime95 in windows (assuming I can get into Windows without it "resetting") or stress in Linux (I setup a service to run this on boot), the system is stable (have run it 24/7 for over a week like this).
PC components:
CPU: 3900x
CPU Cooler: NZXT X73
MBD: Gigabyte X570 Aorus Pro Wifi
RAM: G.Skill 2 x 16GB 3600MHz (F4-3600C16D-32GTZNC)
GPU: EVGA 1660Ti
SSD: Samsung 1TB 970 Evo Plus
PSU: Corsair RM850
OS: Windows 10 20H2 or Ubuntu 20.04.1
BIOS settings I run compared to factory default:
- Enable XMP profile for RAM.
- Enable SVM and IOMMU (for VM use).
- Disable Full Screen LOGO
- Set fan settings for the headers used by water cooler and case fans.
CPU temperatures are good. ~33C at idle, less 73C after 24hr running prime95, less than 73C after 24hr running stress. The CPU will run at 4612MHz with a single core load or 4060MHz with all 24 threads loaded. The infinity fabric runs at 1800MHz automatically.
BIOS settings I have change in an attempt to fix the problem (one at a time):
- Reduce memory speed to 3200MHz (infinity fabric runs at 1600MHz automatically).
- Not enable XMP altogether.
- Increase RAM voltage to 1.4V.
- Change CPU Vcore to Normal.
- Change CPU Vcore to Normal with Dynamic Vcore set to +0.1V
- Change CPU Vcore to Normal with Dynamic Vcore set to +0.2V
- Change SOC Vcore to Normal
- Change SOC Vcore to Normal with Dynamic Vcore SOC set to +0.1V
- Change SOC Vcore to Normal with Dynamic Vcore SOC set to +0.2V
- Change CPU Vcore to Normal, SOC Vcore to Normal, Dynamic CPU Vcore SOC set to +0.1V, Dynamic Vcore SOC set to +0.1V
- Set PCIe Slot to Gen3
- Disable DRAM Power Down
- Enable Power Loading
I have tried all of the BIOS versions available from F12 through to F31h. I have tried a manual CMOS clear by removing the battery for 5 mins and shorting the battery contacts in the battery holder. I have no interest in overclocking.
Hardware changes tried in an attempt to fix the problem (one at a time, in combinations, and all at once):
- RAM: Another set of G.Skill 2 x 16GB 3600MHz, F4-3600C16D-32GTZNC (I run 2 of these sets in a 3960x build)
- GPU: Gigabyte GT1030
- SSD: Intel 760p 1TB (NVMe) or Intel 660p 1TB (SATA)
- PSU: Sure Star 600W (2U Rack mount)
- CPU: Re-seating CPU
- CPU/MBD: Check for thermal compound on CPU PINs or in/around CPU socket
Anyone experienced this and perhaps fixed the issue? Or alternatively know some way to determine a MBD or CPU fault?
