BSOD bugcheck (124) only when gaming

So I have built a new machine. It is running:
Win 7
AsRock x99 extreme 11
I7-5930k
GTX980-TI
1 SSD
1 HHD

The machine runs great until I start gaming. The errors are intermittent in time. However they alway result in a BSOD . Here is a crash dump from this

WHEA_UNCORRECTABLE_ERROR (124)
A fatal hardware error has occurred. Parameter 1 identifies the type of error
source that reported the error. Parameter 2 holds the address of the
WHEA_ERROR_RECORD structure that describes the error conditon.
Arguments:
Arg1: 0000000000000004, PCI Express Error
Arg2: fffffa801aa048d8, Address of the WHEA_ERROR_RECORD structure.
Arg3: 0000000000000000
Arg4: 0000000000000000

Debugging Details:

BUGCHECK_STR: 0x124_GenuineIntel

CUSTOMER_CRASH_COUNT: 1

DEFAULT_BUCKET_ID: WIN7_DRIVER_FAULT

CURRENT_IRQL: 0

STACK_TEXT:
fffff880`14061258 fffff800`02e29a3b : 00000000`00000124 00000000`00000004 fffffa80`1aa048d8 00000000`00000000 : nt!KeBugCheckEx
fffff880`14061260 fffff800`02fede63 : 00000000`00000001 fffffa80`1a9eeb10 00000000`00000000 fffffa80`1a9ee1b0 : hal!HalBugCheckSystem+0x1e3
fffff880`140612a0 fffff880`00fbcbcf : fffffa80`00000750 fffffa80`1a9eeb10 00000000`00000000 fffffa80`1aa037f0 : nt!WheaReportHwError+0x263
fffff880`14061300 fffff880`00fbc5f6 : 00000000`00000000 fffff880`14061450 fffffa80`1aa42e40 fffff880`140613d0 : pci!ExpressRootPortAerInterruptRoutine+0x27f
fffff880`14061360 fffff800`02ecf41c : 00000000`00000000 fffff880`14061450 fffffa80`1aa42e40 00000000`00000001 : pci!ExpressRootPortInterruptRoutine+0x36
fffff880`140613d0 fffff880`05a9b0e6 : 00000000`00000000 fffff880`14061620 fffffa80`1b111000 00000000`00000000 : nt!KiInterruptDispatch+0x16c
fffff880`14061560 00000000`00000000 : fffff880`14061620 fffffa80`1b111000 00000000`00000000 fffff880`140616b0 : nvlddmkm+0x1ad0e6


STACK_COMMAND: kb

FOLLOWUP_NAME: MachineOwner

MODULE_NAME: GenuineIntel

IMAGE_NAME: GenuineIntel

DEBUG_FLR_IMAGE_TIMESTAMP: 0

FAILURE_BUCKET_ID: X64_0x124_GenuineIntel_PCIEXPRESS

BUCKET_ID: X64_0x124_GenuineIntel_PCIEXPRESS

Followup: MachineOwner

I have tried all of my bios updates. I have tried GPU driver updates(just in case). I have switched out cards and no luck. Running Prime 95 over night on CPU no crashes. Testing RAM with Prime still no crashes only during gaming. I'm begining to think it is the MoBo however I was hoping for a litter more wisdom on what might be causing this before I RMA the board. Any advice is greatly appreciated. Thanks!