I have an issue with my machine that consists of an, Asus M4N I think with an X4 940 also has an GTX 260. The problem I kept having was that my dual monitors kept turning off. The screens would go to stand by then come back on, then I would get a notification that the display driver had quit working... I reinstalled the drivers etc. It seems that I have very un reliable unclean power in my office, I bough an APC 1500 and it clicks on constantly. Since using the APC the driver error with Nvidia seems to have gone away. The problem is that the computer just hangs and the screens go black. Some times it reboots sometimes it just sits there. Sometimes if it reboots it comes up that windows has had an error and it says "Bluescreen" was the problem. I have yet to see a BSOD just the screens go off and comp seems to hang. I reinstalled and cleaned all of the drivers (chipset GFX etc.) and the problem still persists. Any help would be great. I even did a repair on Win 7. Could this be hardware related? I have tried a different PSU and GPU. Thanks for the help! Really need to get this sorted. Problem signature: Problem Event Name: BlueScreen OS Version: 6.1.7601.2.1.0.256.48 Locale ID: 1033 Additional information about the problem: BCCode: f7 BCP1: 0000077FFCE7384F BCP2: 00002B992DDFA232 BCP3: FFFFD466D2205DCD BCP4: 0000000000000000 OS Version: 6_1_7601 Service Pack: 1_0 Product: 256_1 I cant seem to open the dump file? I tried with notepad...

Hi, Given that you have had power issues in the past, and you have addressed the driver issues. I would recommend you investigate the power supply in the PC. Either the unit was damaged from the power or the unit is not delivering sufficient power to the GPU. Check the power requirements of your graphics card vs the power supply installed. But to summarise, I would be targeting the power supply in the PC. Martin

I I have already tried a different GPU and PSU. The PSU is a Corsair 700W more than enough for this rig. Seems to be something with windows. Is there anyway I can read or upload the dump file?

Bug Check Code 0x7F: http://msdn.microsoft.com/en-us/library/ff559244(VS.85).aspx Use Microsoft Skydrive to upload dump files (c:\windows\minidumps) and post a link here. You can also contact Microsoft CSS. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified IT Professional: Enterprise Administrator

https://skydrive.live.com/?cid=9f1b1a8aec0befd1&sc=documents&uc=1&nl=1&id=9F1B1A8AEC0BEFD1%21124# There is the minidump!

******************************************************************************* * * * Bugcheck Analysis * * * ******************************************************************************* DRIVER_OVERRAN_STACK_BUFFER (f7) A driver has overrun a stack-based buffer. This overrun could potentially allow a malicious user to gain control of this machine. DESCRIPTION A driver overran a stack-based buffer (or local variable) in a way that would have overwritten the function's return address and jumped back to an arbitrary address when the function returned. This is the classic "buffer overrun" hacking attack and the system has been brought down to prevent a malicious user from gaining complete control of it. Do a kb to get a stack backtrace -- the last routine on the stack before the buffer overrun handlers and bugcheck call is the one that overran its local variable(s). Arguments: Arg1: 0000077ffce7384f, Actual security check cookie from the stack Arg2: 00002b992ddfa232, Expected security check cookie Arg3: ffffd466d2205dcd, Complement of the expected security check cookie Arg4: 0000000000000000, zero Debugging Details: ------------------ DEFAULT_BUCKET_ID: GS_FALSE_POSITIVE_MISSING_GSFRAME SECURITY_COOKIE: Expected 00002b992ddfa232 found 0000077ffce7384f CUSTOMER_CRASH_COUNT: 1 BUGCHECK_STR: 0xF7 PROCESS_NAME: System CURRENT_IRQL: 2 LAST_CONTROL_TRANSFER: from fffff8800f3ee616 to fffff80002edbd00 STACK_TEXT: fffff880`0318c768 fffff880`0f3ee616 : 00000000`000000f7 0000077f`fce7384f 00002b99`2ddfa232 ffffd466`d2205dcd : nt!KeBugCheckEx fffff880`0318c770 00000000`000000f7 : 0000077f`fce7384f 00002b99`2ddfa232 ffffd466`d2205dcd 00000000`00000000 : nvlddmkm+0x1d5616 fffff880`0318c778 0000077f`fce7384f : 00002b99`2ddfa232 ffffd466`d2205dcd 00000000`00000000 fffffa80`090fa580 : 0xf7 fffff880`0318c780 00002b99`2ddfa232 : ffffd466`d2205dcd 00000000`00000000 fffffa80`090fa580 00000000`00000030 : 0x77f`fce7384f fffff880`0318c788 ffffd466`d2205dcd : 00000000`00000000 fffffa80`090fa580 00000000`00000030 fffff880`0f5799b4 : 0x2b99`2ddfa232 fffff880`0318c790 00000000`00000000 : fffffa80`090fa580 00000000`00000030 fffff880`0f5799b4 fffffa80`0a8a3660 : 0xffffd466`d2205dcd STACK_COMMAND: kb FOLLOWUP_IP: nvlddmkm+1d5616 fffff880`0f3ee616 ?? ??? SYMBOL_STACK_INDEX: 1 SYMBOL_NAME: nvlddmkm+1d5616 FOLLOWUP_NAME: MachineOwner MODULE_NAME: nvlddmkm IMAGE_NAME: nvlddmkm.sys DEBUG_FLR_IMAGE_TIMESTAMP: 4dd73a68 FAILURE_BUCKET_ID: X64_0xF7_MISSING_GSFRAME_nvlddmkm+1d5616 BUCKET_ID: X64_0xF7_MISSING_GSFRAME_nvlddmkm+1d5616 Followup: MachineOwner --------- 2: kd> lmvm nvlddmkm start end module name fffff880`0f219000 fffff880`0fec7000 nvlddmkm T (no symbols) Loaded symbol image file: nvlddmkm.sys Image path: \SystemRoot\system32\DRIVERS\nvlddmkm.sys Image name: nvlddmkm.sys Timestamp: Sat May 21 05:07:04 2011 (4DD73A68) CheckSum: 00C9FFFF ImageSize: 00CAE000 Translations: 0000.04b0 0000.04e4 0409.04b0 0409.04e4 ------------------------------------------------ Your BSOD was caused by nvlddmkm.sys driver. This driver belongs to NVIDIA. I see that the latest update of this driver was updated the 21 May 2011. I think that there is problem with this update as I have seen a similar problem with the same update last day. I recommend contacting NVIDIA Technical Support to report that. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified IT Professional: Enterprise Administrator

Wow thanks for the help! Maybe if I driver sweep and revert to an older driver I can get this resolved.

I driver swept and went to older drivers problem continues.... I really need help with this what else can I try?

Revert to a driver that has GTX 260 mentioned in the release notes.