Interpreting A Hard Crash after 1st pass complete with no errors

[valueimagery]

I certainly believe I have a hardware error somewhere with my Gigabyte Z490 i9 10900k 4x8GB 2400mhz Corsairs. I'm getting random crashes, with no Kernel Panics/BSOD while using the OS not under heavy load. Then boot loop crashes, sometimes 2-5 times until able to open the OS.

After running two instances of memtest86 I'm getting a hard crash at the same point after completion of pass #1 and start of pass #2 in both tests.

Is there anyway to interpret this? First step maybe test one stick/one slot at a time?

Thanks for any insight.

2022-02-04 05:56:00 - Finished pass #1 (of 4) (Cumulative error count: 0)
2022-02-04 05:56:00 - Starting pass #2 (of 4)
2022-02-04 05:56:00 - Running test #0 (Test 0 [Address test, walking ones, 1 CPU])
2022-02-04 05:56:00 - MtSupportRunAllTests - Setting random seed to 0x96FBAA70
2022-02-04 05:56:00 - MtSupportRunAllTests - Start time: 6685480 ms
2022-02-04 05:56:00 - MtSupportRunAllTests - Enabling memory cache for test
2022-02-04 05:56:00 - MtSupportRunAllTests - Enabling memory cache complete
2022-02-04 05:56:00 - Start memory range test (0x0 - 0x10BE800000)
2022-02-04 05:56:02 - MtSupportRunAllTests - Test execution time: 1.847s (Test 0 cumulative error count: 0)
2022-02-04 05:56:02 - Running test #1 (Test 1 [Address test, own address, 1 CPU])
2022-02-04 05:56:02 - MtSupportRunAllTests - Setting random seed to 0x50F39820
2022-02-04 05:56:02 - MtSupportRunAllTests - Start time: 6687461 ms
2022-02-04 05:56:02 - MtSupportRunAllTests - Enabling memory cache for test
2022-02-04 05:56:02 - MtSupportRunAllTests - Enabling memory cache complete
2022-02-04 05:56:02 - Start memory range test (0x0 - 0x10BE800000)
2022-02-04 05:56:18 - MtSupportRunAllTests - Test execution time: 15.937s (Test 1 cumulative error count: 0)
2022-02-04 05:56:18 - Running test #2 (Test 2 [Address test, own address])
2022-02-04 05:56:18 - MtSupportRunAllTests - Setting random seed to 0x5A3900C6
2022-02-04 05:56:18 - MtSupportRunAllTests - Start time: 6703568 ms
2022-02-04 05:56:18 - MtSupportRunAllTests - Enabling memory cache for test
2022-02-04 05:56:18 - MtSupportRunAllTests - Enabling memory cache complete
2022-02-04 05:56:18 - Start memory range test (0x0 - 0x10BE800000)
2022-02-04 05:56:29 - MtSupportRunAllTests - Test execution time: 10.554s (Test 2 cumulative error count: 0)
2022-02-04 05:56:29 - Running test #3 (Test 3 [Moving inversions, ones & zeroes])
2022-02-04 05:56:29 - MtSupportRunAllTests - Setting random seed to 0xAADF7280
2022-02-04 05:56:29 - MtSupportRunAllTests - Start time: 6714256 ms
2022-02-04 05:56:29 - MtSupportRunAllTests - Enabling memory cache for test
2022-02-04 05:56:29 - MtSupportRunAllTests - Enabling memory cache complete
2022-02-04 05:56:29 - Start memory range test (0x0 - 0x10BE800000)

2022-02-04 08:41:18 - Finished pass #1 (of 4) (Cumulative error count: 0)
2022-02-04 08:41:18 - Starting pass #2 (of 4)
2022-02-04 08:41:18 - Running test #0 (Test 0 [Address test, walking ones, 1 CPU])
2022-02-04 08:41:18 - MtSupportRunAllTests - Setting random seed to 0xBAFF249E
2022-02-04 08:41:18 - MtSupportRunAllTests - Start time: 6675667 ms
2022-02-04 08:41:18 - MtSupportRunAllTests - Enabling memory cache for test
2022-02-04 08:41:18 - MtSupportRunAllTests - Enabling memory cache complete
2022-02-04 08:41:18 - Start memory range test (0x0 - 0x10BE800000)
2022-02-04 08:41:20 - MtSupportRunAllTests - Test execution time: 1.837s (Test 0 cumulative error count: 0)
2022-02-04 08:41:20 - Running test #1 (Test 1 [Address test, own address, 1 CPU])
2022-02-04 08:41:20 - MtSupportRunAllTests - Setting random seed to 0x6AFBB056
2022-02-04 08:41:20 - MtSupportRunAllTests - Start time: 6677570 ms
2022-02-04 08:41:20 - MtSupportRunAllTests - Enabling memory cache for test
2022-02-04 08:41:20 - MtSupportRunAllTests - Enabling memory cache complete
2022-02-04 08:41:20 - Start memory range test (0x0 - 0x10BE800000)
2022-02-04 08:41:36 - MtSupportRunAllTests - Test execution time: 15.916s (Test 1 cumulative error count: 0)
2022-02-04 08:41:36 - Running test #2 (Test 2 [Address test, own address])
2022-02-04 08:41:36 - MtSupportRunAllTests - Setting random seed to 0x5846820E
2022-02-04 08:41:36 - MtSupportRunAllTests - Start time: 6693551 ms
2022-02-04 08:41:36 - MtSupportRunAllTests - Enabling memory cache for test
2022-02-04 08:41:36 - MtSupportRunAllTests - Enabling memory cache complete
2022-02-04 08:41:36 - Start memory range test (0x0 - 0x10BE800000)
2022-02-04 08:41:47 - MtSupportRunAllTests - Test execution time: 10.459s (Test 2 cumulative error count: 0)
2022-02-04 08:41:47 - Running test #3 (Test 3 [Moving inversions, ones & zeroes])
2022-02-04 08:41:47 - MtSupportRunAllTests - Setting random seed to 0x843809E4
2022-02-04 08:41:47 - MtSupportRunAllTests - Start time: 6704076 ms
2022-02-04 08:41:47 - MtSupportRunAllTests - Enabling memory cache for test
2022-02-04 08:41:47 - MtSupportRunAllTests - Enabling memory cache complete
2022-02-04 08:41:47 - Start memory range test (0x0 - 0x10BE800000)

[David (PassMark)]

Seems likely this is a hardware fault.

Sudden reboots / lockups / shutdowns are very hard to debug for a home user.
Without a team of experienced hardware engineers and some high end test equipment you are left with trial and error. Basically taking a guess and swapping components in and out until the problem is solved. But start with the easy step of checking if there is updated BIOS firmware.

See also this page
https://www.memtest86.com/troubleshooting.htm