De acordo com o despejo, seu driver gráfico NVIDIA para sua GPU (VEN_10DE & DEV_1183) causa a falha:
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* Bugcheck Analysis *
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DRIVER_POWER_STATE_FAILURE (9f)
A driver has failed to complete a power IRP within a specific time.
Arguments:
Arg1: 0000000000000003, A device object has been blocking an Irp for too long a time
Arg2: ffffe000ef7a2320, Physical Device Object of the stack
Arg3: fffff802d40f7990, nt!TRIAGE_9F_POWER on Win7 and higher, otherwise the Functional Device Object of the stack
Arg4: ffffe0010734b010, The blocked IRP
Debugging Details:
------------------
Implicit thread is now ffffe000'f6b69600
*** WARNING: Unable to verify timestamp for nvlddmkm.sys
*** ERROR: Module load completed but symbols could not be loaded for nvlddmkm.sys
SYSTEM_SKU: To be filled by O.E.M.
SYSTEM_VERSION: To be filled by O.E.M.
BIOS_DATE: 05/30/2014
BASEBOARD_PRODUCT: Z97MX-Gaming 5
BASEBOARD_VERSION: x.x
BUGCHECK_P1: 3
BUGCHECK_P2: ffffe000ef7a2320
BUGCHECK_P3: fffff802d40f7990
BUGCHECK_P4: ffffe0010734b010
DRVPOWERSTATE_SUBCODE: 3
FAULTING_THREAD: f6b69600
CPU_COUNT: 4
CPU_MHZ: dac
CPU_VENDOR: GenuineIntel
CPU_FAMILY: 6
CPU_MODEL: 3c
CPU_STEPPING: 3
CUSTOMER_CRASH_COUNT: 1
DEFAULT_BUCKET_ID: WIN8_DRIVER_FAULT
BUGCHECK_STR: 0x9F
PROCESS_NAME: System
CURRENT_IRQL: 2
ANALYSIS_VERSION: 10.0.10240.9 amd64fre
LAST_CONTROL_TRANSFER: from fffff802d22bb0d0 to fffff802d23c8c76
STACK_TEXT:
00 nt!KiSwapContext
01 nt!KiSwapThread
02 nt!KiCommitThreadWait
03 nt!KeWaitForSingleObject
04 dxgkrnl!DpiRequestIoPowerState
05 dxgkrnl!DpiFdoSetAdapterPowerState
06 dxgkrnl!DpiFdoHandleDevicePower
07 dxgkrnl!DpiDispatchPower
08 nvlddmkm
09 0x0
0a 0x0
0b 0x0
STACK_COMMAND: .thread 0xffffe000f6b69600 ; kb
FOLLOWUP_IP:
dxgkrnl!DpiRequestIoPowerState+a2
fffff802'0247f682 8bd8 mov ebx,eax
SYMBOL_STACK_INDEX: 4
SYMBOL_NAME: dxgkrnl!DpiRequestIoPowerState+a2
FOLLOWUP_NAME: MachineOwner
MODULE_NAME: dxgkrnl
IMAGE_NAME: dxgkrnl.sys
DEBUG_FLR_IMAGE_TIMESTAMP: 55bebfed
IMAGE_VERSION: 10.0.10240.16425
BUCKET_ID_FUNC_OFFSET: a2
FAILURE_BUCKET_ID: 0x9F_3_POWER_DOWN_dxgkrnl!DpiRequestIoPowerState
BUCKET_ID: 0x9F_3_POWER_DOWN_dxgkrnl!DpiRequestIoPowerState
PRIMARY_PROBLEM_CLASS: 0x9F_3_POWER_DOWN_dxgkrnl!DpiRequestIoPowerState
ANALYSIS_SOURCE: KM
FAILURE_ID_HASH_STRING: km:0x9f_3_power_down_dxgkrnl!dpirequestiopowerstate
FAILURE_ID_HASH: {1f04a7b8-25d5-85a2-98d6-ff5f5302be37}
Followup: MachineOwner
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0: kd> !podev ffffe000ef7a2320
Device object is for:
DriverObject ef7ea820
Current Irp 00000000 RefCount 0 Type 00000023 AttachedDev ffffe000ef78bdb0 DevFlags 00001040
Device queue is not busy.
Device Object Extension: ffffe000ef7a2a68:
PowerFlags: 00000010 =>SystemState=0 DeviceState=1
Dope: 00000000:
0: kd> !devstack ffffe000ef78bdb0
!DevObj !DrvObj !DevExt ObjectName
ffffe000f278c040 \Driver\nvlddmkm ffffe000f278c190 InfoMask field not found for _OBJECT_HEADER at ffffe000f278c010
> ffffe000ef78bdb0 \Driver\ACPI ffffe000ee094c70
ffffe000ef7a2320 \Driver\pci ffffe000ef7a2470 Cannot read info offset from nt!ObpInfoMaskToOffset
!DevNode ffffe000ef78baa0 :
DeviceInst is "PCI\VEN_10DE&DEV_1183&SUBSYS_35561458&REV_A1&1286464&0&0008"
ServiceName is "nvlddmkm"
0: kd> lmvm nvlddmkm
Browse full module list
start end module name
fffff802'02740000 fffff802'03233000 nvlddmkm T (no symbols)
Loaded symbol image file: nvlddmkm.sys
Image path: \SystemRoot\system32\DRIVERS\nvlddmkm.sys
Image name: nvlddmkm.sys
Browse all global symbols functions data
Timestamp: Sun Sep 13 23:12:24 2015
Denuncie à nVIDIA em seus fóruns e, como solução alternativa, tente desativar toda a energia salvando opções que você pode no driver Geforce.