How to identify if CPU or Motherboard is faulty

[Kevo05s]

Title says it all, I have a spare of everything else, and it was all tested and works just fine. But even with spare parts, the motherboard or CPU is still giving me issues... 

The issue: the system posts fine, and I can stay in the BIOS without issue for hours, but as soon as there's a certain type of load on the system, it just shuts down and reboot. I've also tried booting to Linux from my USB, and it crashes exactly the same way.

Temps on the system never exceeded 61C at peak on the package, and sub 60 on cores according to HWmonitor. Motherboard's sensors never saw over 50, and there's good airflow. I was just done from 1 hour of benchmarks and 1 hour of gaming at GTA 5 successfully, then when I opened the Netflix Windows app, PC crashed without any reason.

Troubleshooting done:

Removed GPU

Replaced PSU for a known good PSU

Replaced RAM for a know good stick

Unplugged every connection on the motherboard

Loaded optimized default in BIOS.

I've basically narrowed it down to CPU/Motherboard, but I don't know how to tell which is at fault. I've had the motherboard since September and never had issues, the CPU is new from last week.

Specs: i7 10700

Asus H470i Strix

16 GB HyperX Predator RGB 3200MHz (running at 2933MHz)

Asus RX 6700XT Dual

Corsair MP600 500GB 

WD SN550 1TB

EVGA 650G3 

EK Classic CPU block

Corsair XR5 240mm

2xNoctua Redux 1700RPM 120mm fans

MetallicGear Neo Mini V2

[LIGISTX]

50 minutes ago, Kevo05s said:

Title says it all, I have a spare of everything else, and it was all tested and works just fine. But even with spare parts, the motherboard or CPU is still giving me issues... 

The issue: the system posts fine, and I can stay in the BIOS without issue for hours, but as soon as there's a certain type of load on the system, it just shuts down and reboot. I've also tried booting to Linux from my USB, and it crashes exactly the same way.

Temps on the system never exceeded 61C at peak on the package, and sub 60 on cores according to HWmonitor. Motherboard's sensors never saw over 50, and there's good airflow. I was just done from 1 hour of benchmarks and 1 hour of gaming at GTA 5 successfully, then when I opened the Netflix Windows app, PC crashed without any reason.

Troubleshooting done:

Removed GPU

Replaced PSU for a known good PSU

Replaced RAM for a know good stick

Unplugged every connection on the motherboard

Loaded optimized default in BIOS.

I've basically narrowed it down to CPU/Motherboard, but I don't know how to tell which is at fault. I've had the motherboard since September and never had issues, the CPU is new from last week.

Specs: i7 10700

Asus H470i Strix

16 GB HyperX Predator RGB 3200MHz (running at 2933MHz)

Asus RX 6700XT Dual

Corsair MP600 500GB 

WD SN550 1TB

EVGA 650G3 

EK Classic CPU block

Corsair XR5 240mm

2xNoctua Redux 1700RPM 120mm fans

MetallicGear Neo Mini V2

Are you on the latest BIOS?

[Kevo05s]

15 minutes ago, LIGISTX said:

Are you on the latest BIOS?

I believe so, but if I'm not, I'm very afraid of having my PC crash mid flash.

[LIGISTX]

3 hours ago, Kevo05s said:

I believe so, but if I'm not, I'm very afraid of having my PC crash mid flash.

Check what BIOS you are on vs what the newest is. Do you still have your old CPU?