BSOD 0x3b When starting multiple VM's

[StuartMc]

Below is the debug of the memory dump. Server is Windows 2012 with 128GB Ram and quad E7-4850's.

Microsoft (R) Windows Debugger Version 6.3.9600.17336 AMD64
Copyright (c) Microsoft Corporation. All rights reserved.


Loading Dump File [C:\Users\stuadda\Desktop\MEMORY.DMP]
Kernel Bitmap Dump File: Only kernel address space is available


************* Symbol Path validation summary **************
Response                         Time (ms)     Location
Deferred                                       SRV*C:\Windows\symbol_cache*http://msdl.microsoft.com/download/symbols
Symbol search path is: SRV*C:\Windows\symbol_cache*http://msdl.microsoft.com/download/symbols
Executable search path is: 
Windows 8 Kernel Version 9600 MP (80 procs) Free x64
Product: Server, suite: TerminalServer SingleUserTS
Built by: 9600.17736.amd64fre.winblue_r9.150322-1500
Machine Name:
Kernel base = 0xfffff803`6a085000 PsLoadedModuleList = 0xfffff803`6a35e850
Debug session time: Tue Jun 30 10:10:53.508 2015 (UTC - 4:00)
System Uptime: 0 days 1:23:00.009
Loading Kernel Symbols
...............................................................
................................................................
.................
Loading User Symbols
PEB is paged out (Peb.Ldr = 00007ff6`9e46f018).  Type ".hh dbgerr001" for details
Loading unloaded module list
.....
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

Use !analyze -v to get detailed debugging information.

BugCheck 3B, {c000001d, fffff8013088d57c, ffffd00028f34e20, 0}

*** ERROR: Symbol file could not be found.  Defaulted to export symbols for VMMR0.r0 - 
*** ERROR: Symbol file could not be found.  Defaulted to export symbols for VBoxDrv.sys - 
Probably caused by : VMMR0.r0 ( VMMR0!VMXR0Enter+c )

Followup: MachineOwner
---------

20: kd> !analyze -v
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

SYSTEM_SERVICE_EXCEPTION (3b)
An exception happened while executing a system service routine.
Arguments:
Arg1: 00000000c000001d, Exception code that caused the bugcheck
Arg2: fffff8013088d57c, Address of the instruction which caused the bugcheck
Arg3: ffffd00028f34e20, Address of the context record for the exception that caused the bugcheck
Arg4: 0000000000000000, zero.

Debugging Details:
------------------


EXCEPTION_CODE: (NTSTATUS) 0xc000001d - {EXCEPTION}  Illegal Instruction  An attempt was made to execute an illegal instruction.

FAULTING_IP: 
VMMR0!VMXR0Enter+c
fffff801`3088d57c 0fc7742410      vmptrld qword ptr [rsp+10h]

CONTEXT:  ffffd00028f34e20 -- (.cxr 0xffffd00028f34e20;r)
rax=00000000bee3c000 rbx=fffff8013096b380 rcx=ffffd0002b207000
rdx=ffffd0002b222000 rsi=ffffd0002b207000 rdi=ffffd0002b222000
rip=fffff8013088d57c rsp=ffffd00028f35858 rbp=ffffd00028f35c00
 r8=fffff8013096b380  r9=ffffd0002b207000 r10=ffff800000000000
r11=fffff8036a1e1470 r12=0000000000000003 r13=0000000000228307
r14=ffffe000eea1c1a0 r15=0000000000228307
iopl=0         nv up ei ng nz na pe nc
cs=0010  ss=0018  ds=002b  es=002b  fs=0053  gs=002b             efl=00010282
VMMR0!VMXR0Enter+0xc:
fffff801`3088d57c 0fc7742410      vmptrld qword ptr [rsp+10h] ss:0018:ffffd000`28f35868=00000000bee3c000
Last set context:
rax=00000000bee3c000 rbx=fffff8013096b380 rcx=ffffd0002b207000
rdx=ffffd0002b222000 rsi=ffffd0002b207000 rdi=ffffd0002b222000
rip=fffff8013088d57c rsp=ffffd00028f35858 rbp=ffffd00028f35c00
 r8=fffff8013096b380  r9=ffffd0002b207000 r10=ffff800000000000
r11=fffff8036a1e1470 r12=0000000000000003 r13=0000000000228307
r14=ffffe000eea1c1a0 r15=0000000000228307
iopl=0         nv up ei ng nz na pe nc
cs=0010  ss=0018  ds=002b  es=002b  fs=0053  gs=002b             efl=00010282
VMMR0!VMXR0Enter+0xc:
fffff801`3088d57c 0fc7742410      vmptrld qword ptr [rsp+10h] ss:0018:ffffd000`28f35868=00000000bee3c000
Resetting default scope

DEFAULT_BUCKET_ID:  WIN8_DRIVER_FAULT

BUGCHECK_STR:  0x3B

PROCESS_NAME:  VirtualBox.exe

CURRENT_IRQL:  2

ANALYSIS_VERSION: 6.3.9600.17336 (debuggers(dbg).150226-1500) amd64fre

LAST_CONTROL_TRANSFER:  from fffff80130885250 to fffff8013088d57c

STACK_TEXT:  
ffffd000`28f35858 fffff801`30885250 : ffffd000`2b222000 00000000`bee3c000 00000487`9ccc98be ffffe400`53fec830 : VMMR0!VMXR0Enter+0xc
ffffd000`28f35860 fffff801`30899ef3 : ffffd000`2b222000 00000000`00000000 00000000`00000000 00000000`00000080 : VMMR0!GVMMR0CreateVMReq+0xe00
ffffd000`28f35890 fffff801`2d0ec70f : 00000000`ffffffff 00000000`000007b4 ffffe400`53fec830 0000001e`0012019f : VMMR0!VMMR0EntryFast+0xf3
ffffd000`28f358f0 fffff801`2d0fb45b : ffffe000`ed0ec900 ffffd000`28f35cc0 00000000`00000000 ffffe000`ed0a8b38 : VBoxDrv+0x170f
ffffd000`28f35920 fffff803`6a4aa27c : ffffe000`eea1c050 00000000`00000000 00000000`00000000 fffff803`00000000 : VBoxDrv!SUPR0GetKernelFeatures+0x230b
ffffd000`28f359c0 fffff803`6a4a9d22 : 00000000`fffffb83 00007ffd`a3bd0000 00000000`00000000 00000000`00000000 : nt!IopXxxControlFile+0x54c
ffffd000`28f35b60 fffff803`6a1e14b3 : 00000000`00000000 00000000`033ab000 ffffe000`ec605c00 ffffd000`28f35cc0 : nt!NtDeviceIoControlFile+0x56
ffffd000`28f35bd0 00007ffd`b818123a : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiSystemServiceCopyEnd+0x13
00000000`0509f568 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : 0x00007ffd`b818123a


FOLLOWUP_IP: 
VMMR0!VMXR0Enter+c
fffff801`3088d57c 0fc7742410      vmptrld qword ptr [rsp+10h]

SYMBOL_STACK_INDEX:  0

SYMBOL_NAME:  VMMR0!VMXR0Enter+c

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: VMMR0

IMAGE_NAME:  VMMR0.r0

DEBUG_FLR_IMAGE_TIMESTAMP:  55070694

STACK_COMMAND:  .cxr 0xffffd00028f34e20 ; kb

BUCKET_ID_FUNC_OFFSET:  c

FAILURE_BUCKET_ID:  0x3B_VMMR0!VMXR0Enter

BUCKET_ID:  0x3B_VMMR0!VMXR0Enter

ANALYSIS_SOURCE:  KM

FAILURE_ID_HASH_STRING:  km:0x3b_vmmr0!vmxr0enter

FAILURE_ID_HASH:  {545b206b-b31b-98cb-02a0-6bcbb5a4472b}

Followup: MachineOwner
---------

[StuartMc]

First Server Log

[StuartMc]

Second Server Log

[StuartMc]

3rd Server Log Causes Crash on Start