Hi technet, I have bought new PC. I'v built it on my own. I know how to do it so I'm sure it is not a reason. My problem: This month I had several BSODS, They appear randomly. It doesn't matter If I was playing, browsing or doing nothing. At the moment I'v got 11 mini dumps. Most of them happened when I had 2 x 2GB of RAM. When I use only 1x2 GB It is OK. Looks like they can't work together but separately they are fine. I'v uploaded dumps for you so maybe you can help me to find solution. Sorry for language. I hope everything is understandable. http://download1315.mediafire.com/acjbixl66qjg/0p24bo1jcia9tqb/dumps.rar Specifications Windows 7 Ultimate 64-bit Asrock P67 Pro3 Intel Core i5 2500k 2x2GB OCZ DDR3 Platinum ASUS Dark Knight GTS250 1TB Samsung spinpoint f3 DVD reader/writer That's all i could read from those dumps. My debu software is not reading all symbols properly so that is all Infos I could read from them: Probably caused by : Ntfs.sys ( Ntfs+1e95 ) Probably caused by : ntoskrnl.exe ( nt+70740 ) Probably caused by : ntoskrnl.exe ( nt+70740 ) Probably caused by : ntoskrnl.exe ( nt+70740 ) Probably caused by : ntoskrnl.exe ( nt+70740 ) Probably caused by : Ntfs.sys ( Ntfs+1e95 ) Probably caused by : ntoskrnl.exe ( nt+71f00 ) Probably caused by : ntoskrnl.exe ( nt+71f00 ) Probably caused by : ntoskrnl.exe ( nt+71f00 ) Probably caused by : ntoskrnl.exe ( nt+71f00 ) Probably caused by : ntoskrnl.exe ( nt+71f00 ) As far as I remember most of them are memory management errors. Last one was System Service Exception If you have any question... please let me know Thanks in advance for any assistance!

check the memory goto http://www.memtest.org and use the CD or USB as needed My MVP is for the Windows Desktop Experience, i.e. Windows XP, Vista and Windows 7 IT Remote Assistance is available for a fee. I am best with C++ and I am learning C# using Visual Studio 2010 Developer | Windows IT | Chess | Economics | Hardcore Games | Vegan Advocate | PC Reviews

Done!! Yesterday I'v done it. It passed test. I'v tested them one by one and together as well. I left Pc ON for whole day and nothing happened. Until today. 10 minutes ago CRASH! Cdd.Dll System Service Exception. So i will test it again. This time I will test it about 5-6 times and I will let you guys know about results. Previously 2-3 times each bone. latest BSOD Below. http://img801.imageshack.us/i/p1030864k.jpg/ And mini dump --> http://download1336.mediafire.com/fk1hr6h2u9eg/azs3sbwo2sjlslj/042511-16286-01.dmp

******************************************************************************* * * * Bugcheck Analysis * * * ******************************************************************************* SYSTEM_SERVICE_EXCEPTION (3b) An exception happened while executing a system service routine. Arguments: Arg1: 00000000c0000005, Exception code that caused the bugcheck Arg2: fffff960007cdf9c, Address of the exception record for the exception that caused the bugcheck Arg3: fffff88005224910, Address of the context record for the exception that caused the bugcheck Arg4: 0000000000000000, zero. Debugging Details: ------------------ EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - The instruction at "0x%08lx" referenced memory at "0x%08lx". The memory could not be "%s". FAULTING_IP: cdd!CddBitmapHw::AddCommandBufferReference+44 fffff960`007cdf9c 4c8910 mov qword ptr [rax],r10 CONTEXT: fffff88005224910 -- (.cxr 0xfffff88005224910) rax=fdfff900c1ff4580 rbx=fffff900c1f8b730 rcx=fffff900c1f8b730 rdx=fffff900c1ff4580 rsi=0000000000000001 rdi=0000000000000001 rip=fffff960007cdf9c rsp=fffff880052252e0 rbp=fffff880052259f0 r8=fffff880052259f0 r9=0000000000000001 r10=fffff900c1f8b9f0 r11=0000000000000040 r12=fffff880052256f0 r13=0000000000000001 r14=0000000000000010 r15=fffff880052259f0 iopl=0 nv up ei ng nz ac pe nc cs=0010 ss=0018 ds=002b es=002b fs=0053 gs=002b efl=00010292 cdd!CddBitmapHw::AddCommandBufferReference+0x44: fffff960`007cdf9c 4c8910 mov qword ptr [rax],r10 ds:002b:fdfff900`c1ff4580=???????????????? Resetting default scope DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT BUGCHECK_STR: 0x3B PROCESS_NAME: Garena.exe CURRENT_IRQL: 0 LAST_CONTROL_TRANSFER: from 0000000000000000 to fffff960007cdf9c STACK_TEXT: fffff880`052252e0 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : cdd!CddBitmapHw::AddCommandBufferReference+0x44 FOLLOWUP_IP: cdd!CddBitmapHw::AddCommandBufferReference+44 fffff960`007cdf9c 4c8910 mov qword ptr [rax],r10 SYMBOL_STACK_INDEX: 0 SYMBOL_NAME: cdd!CddBitmapHw::AddCommandBufferReference+44 FOLLOWUP_NAME: MachineOwner MODULE_NAME: cdd IMAGE_NAME: cdd.dll DEBUG_FLR_IMAGE_TIMESTAMP: 4d3fbfc6 STACK_COMMAND: .cxr 0xfffff88005224910 ; kb FAILURE_BUCKET_ID: X64_0x3B_cdd!CddBitmapHw::AddCommandBufferReference+44 BUCKET_ID: X64_0x3B_cdd!CddBitmapHw::AddCommandBufferReference+44 Followup: MachineOwner --------- 3: kd> lmvm cdd start end module name fffff960`007c0000 fffff960`007e7000 cdd (pdb symbols) downstreamstore\cdd.pdb\B1F1C5D9B819472399DE97F9734804B01\cdd.pdb Loaded symbol image file: cdd.dll Mapped memory image file: DownstreamStore\cdd.dll\4D3FBFC627000\cdd.dll Image path: \SystemRoot\System32\cdd.dll Image name: cdd.dll Timestamp: Wed Jan 26 07:31:34 2011 (4D3FBFC6) CheckSum: 0002E629 ImageSize: 00027000 File version: 6.1.7600.16748 Product version: 6.1.7600.16748 File flags: 0 (Mask 3F) File OS: 40004 NT Win32 File type: 3.4 Driver File date: 00000000.00000000 Translations: 0000.04b0 CompanyName: Microsoft Corporation ProductName: Microsoft® Windows® Operating System InternalName: cdd.dll OriginalFilename: cdd.dll ProductVersion: 6.1.7600.16748 FileVersion: 6.1.7600.16748 (win7_gdr.110125-1530) FileDescription: Canonical Display Driver LegalCopyright: © Microsoft Corporation. All rights reserved. --------------------------------------------------------------------------------------------- Bug Check Code 0x3B: http://msdn.microsoft.com/en-us/library/ff558949(VS.85).aspx The BSOD was caused by Canonical Display Driver. Please update it or contact Canonical Technical Support. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 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

Unfortunately..... Memtest results below: http://img402.imageshack.us/i/p1030865a.jpg/ I guess RAM is faulty.......... Unless there is something i can change

OK, now we have identified the problem. Can you tell me the exact make and model of memory you have? My MVP is for the Windows Desktop Experience, i.e. Windows XP, Vista and Windows 7 IT Remote Assistance is available for a fee. I am best with C++ and I am learning C# using Visual Studio 2010 Developer | Windows IT | Chess | Economics | Hardcore Games | Vegan Advocate | PC Reviews

2x2GB DDR3 OCZ3P1600C9ELV4GK

First I want you to update the BIOS on your motherboard. Then get back here if there is not change My MVP is for the Windows Desktop Experience, i.e. Windows XP, Vista and Windows 7 IT Remote Assistance is available for a fee. I am best with C++ and I am learning C# using Visual Studio 2010 Developer | Windows IT | Chess | Economics | Hardcore Games | Vegan Advocate | PC Reviews

I'v done it long time ago. It is 1.70 BIOS. There is 1.80 but looks like it changes boot logo only. http://www.asrock.com/mb/download.asp?Model=P67%20Pro3&o=BIOS

Install it, its likely got some changes that are not visible Seems there are not even any release notes, not what I want to see My MVP is for the Windows Desktop Experience, i.e. Windows XP, Vista and Windows 7 IT Remote Assistance is available for a fee. I am best with C++ and I am learning C# using Visual Studio 2010 Developer | Windows IT | Chess | Economics | Hardcore Games | Vegan Advocate | PC Reviews