BSOD Critical_Process_Died, error code ef

All three dumps are identical and unfortunately don't have much useful data in them.

Code:

BugCheck EF, {ffff9808e8cb5080, 0, 0, 0}

ETW minidump data unavailable
Probably caused by : memory_corruption

Followup:     memory_corruption
---------

1: kd> !analyze -v
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*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
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CRITICAL_PROCESS_DIED (ef)
        A critical system process died
Arguments:
Arg1: ffff9808e8cb5080, Process object or thread object
Arg2: 0000000000000000, If this is 0, a process died. If this is 1, a thread died.
Arg3: 0000000000000000
Arg4: 0000000000000000

MODULE_NAME: memory_corruption
IMAGE_NAME:  memory_corruption
FOLLOWUP_NAME:  memory_corruption
DEBUG_FLR_IMAGE_TIMESTAMP:  0
MEMORY_CORRUPTOR:  LARGE
FAILURE_BUCKET_ID:  MEMORY_CORRUPTION_LARGE
BUCKET_ID:  MEMORY_CORRUPTION_LARGE
PRIMARY_PROBLEM_CLASS:  MEMORY_CORRUPTION_LARGE

This can be caused by defective memory or a driver that is corrupting storage. Looking at the Biostar web site for the TZ77D board, I see two drivers that were updated in 2016. Please download and install them if you have not already done so.

On-board Audio
eHot-Line Utility

If that doesn't help then test your ram with memtest86+, I repeat, memtest86+, no other please. Follow these directioons:

===================================================
Follow this tutorial: MemTest86+ - Test RAM - Windows 10 Forums

MemTest86+ is a diagnostic tool designed to test Random Access Memory (RAM) for faults. MemTest86+ will verify that:

• RAM will accept and keep random patterns of data sent to it
• There are no errors when different parts of memory try to interact
• There are no conflicts between memory addresses

Memtest86+ runs from bootable media to isolate the RAM from the system, no other components are taken into account during the test.

   Warning

MemTest86+ needs to run for at least 8 passes to be anywhere near conclusive, anything less will not give a complete analysis of the RAM.

If you are asked to run MemTest86+ by a Ten Forums member make sure you run the full 8 passes for conclusive results. If you run less than 8 passes you will be asked to run it again.

   Note

MemTest86+ has been known to discover errors in RAM in later passes than the eighth pass. This is for information only; if you feel there is a definite problem with the RAM and 8 passes have shown no errors feel free to continue for longer.

Running 8 passes of MemTest86+ is a long and drawn out exercise and the more RAM you have the longer it will take. It's recommended to run MemTest86+ just before you go to bed and leave it overnight.

Take a picture when done and post in the forum please.

Bad ram, now follow Part Three: Results & Extended Testing in the link I gave you to determine what is defective.