I keep getting the error bluse screen and pc restart: Unexpected_Kernel_Mode_Trap nvlddmkm.sys what

I had before problems with my video card gtx 880 NVidia and I ran few times ago memory check by window and by memtest and there were no errors.

Then I ran some program to test my video card stress and no problems I mean the pc wasn't restart.

When im playing battlefield bad company 2 I hear my video card working very hard with a noise of the fan.

But this bsod pc restart errors started once after I bought and changed my windows upgraded it from 7 to 8.

And this pc restart and errors happen each time when im surfing the tinternet and not while playing.

It happens from time to time the pc can work for a day or two then without any warnings to restart with this message error.

What could be the problem ? Hardware or software ? I must say the video card did problems also before but now more then ever more and more time im getting this error and pc restart.

While im uploading to my drop box the memory.dmp file and this minidump file here is the content of the analyzed result of the mini dump file maybe someone can see and tell me what is the problem ?

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Windows 8 Kernel Version 9200 MP (8 procs) Free x64
Product: WinNt, suite: TerminalServer SingleUserTS
Built by: 9200.16496.amd64fre.win8_gdr.130108-1504
Machine Name:
Kernel base = 0xfffff800`9a482000 PsLoadedModuleList = 0xfffff800`9a74ba80
Debug session time: Thu Feb 21 11:22:13.180 2013 (UTC - 5:00)
System Uptime: 4 days 7:45:11.840
*******************************************************************************
*                                                                             *
*                        Bugcheck Analysis                                    *
*                                                                             *
*******************************************************************************

UNEXPECTED_KERNEL_MODE_TRAP (7f)
This means a trap occurred in kernel mode, and it's a trap of a kind
that the kernel isn't allowed to have/catch (bound trap) or that
is always instant death (double fault).  The first number in the
bugcheck params is the number of the trap (8 = double fault, etc)
Consult an Intel x86 family manual to learn more about what these
traps are. Here is a *portion* of those codes:
If kv shows a taskGate
use .tss on the part before the colon, then kv.
Else if kv shows a trapframe
use .trap on that value
Else
.trap on the appropriate frame will show where the trap was taken
(on x86, this will be the ebp that goes with the procedure KiTrap)
Endif
kb will then show the corrected stack.
Arguments:
Arg1: 0000000000000008, EXCEPTION_DOUBLE_FAULT
Arg2: fffff8800146bdb0
Arg3: fffff8800148f000
Arg4: fffff880052b0753

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

TRIAGER: Could not open triage file : e:dump_analysisprogramtriagemodclass.ini, error 2

BUGCHECK_STR:  0x7f_8

CUSTOMER_CRASH_COUNT:  1

DEFAULT_BUCKET_ID:  WIN8_DRIVER_FAULT

PROCESS_NAME:  iexplore.exe

CURRENT_IRQL:  2

LAST_CONTROL_TRANSFER:  from fffff8009a4fb369 to fffff8009a4fc040

STACK_TEXT:  
fffff880`0146bc68 fffff800`9a4fb369 : 00000000`0000007f 00000000`00000008 fffff880`0146bdb0 fffff880`0148f000 : nt!KeBugCheckEx
fffff880`0146bc70 fffff800`9a4f9434 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiBugCheckDispatch+0x69
fffff880`0146bdb0 fffff880`052b0753 : fffff880`0148f030 fffff880`054cea8a 00000000`00000000 fffffa80`054bd010 : nt!KiDoubleFaultAbort+0xb4
fffff880`0148f000 fffff880`0148f030 : fffff880`054cea8a 00000000`00000000 fffffa80`054bd010 fffff880`0148f050 : nvlddmkm+0x205753
fffff880`0148f008 fffff880`054cea8a : 00000000`00000000 fffffa80`054bd010 fffff880`0148f050 fffff880`0526419b : 0xfffff880`0148f030
fffff880`0148f010 00000000`00000000 : fffffa80`054bd010 fffff880`0148f050 fffff880`0526419b fffffa80`05505000 : nvlddmkm+0x423a8a


STACK_COMMAND:  kb

FOLLOWUP_IP: 
nvlddmkm+205753
fffff880`052b0753 ff93a0000000    call    qword ptr [rbx+0A0h]

SYMBOL_STACK_INDEX:  3

SYMBOL_NAME:  nvlddmkm+205753

FOLLOWUP_NAME:  MachineOwner

MODULE_NAME: nvlddmkm

IMAGE_NAME:  nvlddmkm.sys

DEBUG_FLR_IMAGE_TIMESTAMP:  5102506b

FAILURE_BUCKET_ID:  X64_0x7f_8_nvlddmkm+205753

BUCKET_ID:  X64_0x7f_8_nvlddmkm+205753

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

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