Multiple BDOS in the last few days, all different error messages.

I would recommend to update the BIOS to the newest version 3103.
MAXIMUS VII HERO | Motherboards | ASUS Global


The only thing the dump shows is that because of a delay in execution, as we can see below, a hardware error occured.
Before the crash occurs, the system attempts to handle the error unsuccessfully whereafter the WHEA provides the report (shown in the second code) to the CPU which calls the bugcheck function.
As I mentioned, a 0x124 doesn't reveal much. I don't know if it is possible to find the instructions of the function calling KeDelayExecutionThread to find out a little more, but I doubt it.

Code:

STACK_TEXT: 
fffff800`d0f21a38 fffff800`cf811f1f : 00000000`00000124 00000000`00000000 ffffe001`63148028 00000000`be000000 : nt!KeBugCheckEx
fffff800`d0f21a40 fffff800`cf2228bc : ffffe001`63148028 ffffe001`631b7c00 ffffe001`631b7c00 ffffe001`631b7c00 : hal!HalBugCheckSystem+0xcf
fffff800`d0f21a80 fffff800`cf81240c : 00000000`00000728 00000000`00000000 fffff800`d0f21e70 00000000`00000000 : nt!WheaReportHwError+0x258
fffff800`d0f21ae0 fffff800`cf812764 : ffffe001`00000010 ffffe001`631b7c00 fffff800`d0f21c88 ffffe001`631b7c00 : hal!HalpMcaReportError+0x50
fffff800`d0f21c30 fffff800`cf81264e : ffffe001`622d7b40 00000000`00000001 00000000`00000000 00000000`00000000 : hal!HalpMceHandlerCore+0xe8
fffff800`d0f21c80 fffff800`cf81288e : 00000000`00000008 00000000`00000001 00000000`00000000 00000000`00000000 : hal!HalpMceHandler+0xda
fffff800`d0f21cc0 fffff800`cf812a10 : ffffe001`622d7b40 fffff800`d0f21ef0 00000000`00000000 00000000`00000000 : hal!HalpMceHandlerWithRendezvous+0xce
fffff800`d0f21cf0 fffff800`cf15e47b : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : hal!HalHandleMcheck+0x40
fffff800`d0f21d20 fffff800`cf15e231 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KxMcheckAbort+0x7b
fffff800`d0f21e60 fffff800`cf0e4a45 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiMcheckAbort+0x171
ffffd000`4023ca50 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KeDelayExecutionThread+0x45

Code:

0: kd> !errrec ffffe00163148028
===============================================================================
Common Platform Error Record @ ffffe00163148028
-------------------------------------------------------------------------------
Record Id     : 01d1fc885ed87b7d
Severity      : Fatal (1)
Length        : 928
Creator       : Microsoft
Notify Type   : Machine Check Exception
Timestamp     : 8/30/2016 1:59:22 (UTC)
Flags         : 0x00000000

===============================================================================
Section 0     : Processor Generic
-------------------------------------------------------------------------------
Descriptor    @ ffffe001631480a8
Section       @ ffffe00163148180
Offset        : 344
Length        : 192
Flags         : 0x00000001 Primary
Severity      : Fatal

Proc. Type    : x86/x64
Instr. Set    : x64
Error Type    : Cache error
Operation     : Generic
Flags         : 0x00
Level         : 2
CPU Version   : 0x00000000000306c3
Processor ID  : 0x0000000000000000

===============================================================================
Section 1     : x86/x64 Processor Specific
-------------------------------------------------------------------------------
Descriptor    @ ffffe001631480f0
Section       @ ffffe00163148240
Offset        : 536
Length        : 128
Flags         : 0x00000000
Severity      : Fatal

Local APIC Id : 0x0000000000000000
CPU Id        : c3 06 03 00 00 08 10 00 - bf fb fa 7f ff fb eb bf
                00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00
                00 00 00 00 00 00 00 00 - 00 00 00 00 00 00 00 00

Proc. Info 0  @ ffffe00163148240

===============================================================================
Section 2     : x86/x64 MCA
-------------------------------------------------------------------------------
Descriptor    @ ffffe00163148138
Section       @ ffffe001631482c0
Offset        : 664
Length        : 264
Flags         : 0x00000000
Severity      : Fatal

Error         : GCACHEL2_ERR_ERR (Proc 0 Bank 8)
  Status      : 0xbe0000000100110a
  Address     : 0x00000002039f2840
  Misc.       : 0x000003100e024086

A 0x124 means a hardware error occured, a hardware error could occur for various reasons, the cause is very difficult to tell with a single dump having not much data.

Asking for an execution delay for a thread isn't the problem, that is a thing that is done often.
For proper analysis I would think that the status of the delay would be need to known and if possible also some information about what called it, but I by far know enough of debugging to find that out.

Good to hear :)