System crashing and rebooting at random

[FONT=lucida console]**************************Sun Mar 24 09:48:53.210 2013 (UTC - 4:00)**************************
Loading Dump File [C:\Users\Owner\SysnativeBSODApps\032413-21718-01.dmp]
Windows 8 Kernel Version 9200 MP (8 procs) Free x64
Built by: [B]9200[/B].16496.amd64fre.win8_gdr.130108-1504
System Uptime:[B]5 days 16:03:38.407[/B]
*** WARNING: Unable to verify timestamp for nvlddmkm.sys
*** ERROR: Module load completed but symbols could not be loaded for nvlddmkm.sys
Probably caused by :[B]nvlddmkm.sys ( nvlddmkm+9336ac )[/B]
BugCheck [B]116, {fffffa80203a13e0, fffff88004fe46ac, ffffffffc000009a, 4}[/B]
BugCheck Info: [URL="http://www.carrona.org/bsodindx.html#Example"]VIDEO_TDR_FAILURE (116)[/URL]
Arguments: 
Arg1: fffffa80203a13e0, Optional pointer to internal TDR recovery context (TDR_RECOVERY_CONTEXT).
Arg2: fffff88004fe46ac, The pointer into responsible device driver module (e.g. owner tag).
Arg3: ffffffffc000009a, Optional error code (NTSTATUS) of the last failed operation.
Arg4: 0000000000000004, Optional internal context dependent data.
BUGCHECK_STR:  0x116
DEFAULT_BUCKET_ID:  GRAPHICS_DRIVER_TDR_FAULT
PROCESS_NAME:  System
FAILURE_BUCKET_ID: [B]0x116_IMAGE_nvlddmkm.sys[/B]
CPUID:        "Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz"
MaxSpeed:     3500
CurrentSpeed: [B]3500[/B]
  BIOS Version                  P2.50
  BIOS Release Date             10/31/2012
  Manufacturer                  To Be Filled By O.E.M.
  Product Name                  To Be Filled By O.E.M.
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨``
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[FONT=lucida console]**************************Sun Mar 24 09:48:53.210 2013 (UTC - 4:00)**************************
[COLOR=RED][B]MBfilt64.sys                Thu Jul 30 23:40:32 2009 (4A7267B0)[/B][/COLOR]
[COLOR=RED][B]PxHlpa64.sys                Mon Oct 17 10:29:34 2011 (4E9C3BCE)[/B][/COLOR]
[COLOR=RED][B]k57nd60a.sys                Wed Oct 19 16:17:36 2011 (4E9F3060)[/B][/COLOR]
[COLOR=RED][B]aedsatxg.SYS                Tue Dec 27 17:30:45 2011 (4EFA4715)[/B][/COLOR]
[COLOR=RED][B]dtsoftbus01.sys             Fri Jan 13 08:45:46 2012 (4F10358A)[/B][/COLOR]
GEARAspiWDM.sys             Thu May  3 15:56:17 2012 (4FA2E2E1)
RTKVHD64.sys                Tue Jun 19 04:50:56 2012 (4FE03D70)
IntcDAud.sys                Tue Jun 19 10:40:51 2012 (4FE08F73)
hiber_storahci.sys          Wed Jul 25 22:30:35 2012 (5010ABCB)
dump_storahci.sys           Wed Jul 25 22:30:35 2012 (5010ABCB)
[COLOR=RED][B]sptd.sys                    Sat Aug 18 17:05:38 2012 (503003A2)[/B][/COLOR]
iaStorA.sys                 Sat Sep  1 21:01:24 2012 (5042AFE4)
RzSynapse.sys               Thu Oct 18 05:04:42 2012 (507FC62A)
intelppm.sys                Mon Nov  5 22:55:02 2012 (50988A16)
igdkmd64.sys                Wed Dec 12 19:42:26 2012 (50C92472)
HECIx64.sys                 Mon Dec 17 14:32:21 2012 (50CF7345)
nvhda64v.sys                Wed Dec 19 00:41:41 2012 (50D15395)
nvlddmkm.sys                Thu Mar 14 03:29:32 2013 (51417C5C)
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