Ok so I'll cut straight to the stuff that matters:
When I turn the PC on, I boot to the Windows 8 Login screen and I see a message every cold boot that says something to the effect of "Wrong DVI Cable Connected. Please Connect the cable that came with your monitor" and the stuff on the screen looks fuzzy and out of focus. I turn the monitor off and back on, message is always gone and works fine. I'm running a triple monitor setup and this only appears on the center monitor, the other 2 display no messages, require no power toggle and work fine each boot up. Display cables are very securely connected and I have re connected them to be sure. I use these monitors in an Nvidia Surround setup with a resolution of 5846 x 1080.
Proceeding into Windows everything works great. I have a phase change cooled CPU running at -10F and liquid cooled chipset/GPU's running at a constant 28C and 50C under super heavy load. The CPU is overclocked and the GPU's have light overclock via EVGA Precision X (+50mhz on core - so super light). I can run Heaven 4.0 Benchmark nonstop and have no issues whatsoever. I can run Linpac doing a problem that takes up 12GB of ram (huge problem) for 30 hours, no problems. Used to I could run 3DMark 11 for hours and hours, no problems- now, all of a sudden, 3Dmark11 will exit and say that it has lost "exclusive control of the display and/or keyboard". There isn't an error, but as I understand it, the program has to have exclusive control of keyboard and monitor or it quits because this can affect scores. If I unplug the keyboard and start the benchmark, same thing happens.
Now, some games will freeze up at random intervals ALWAYS under an hour and a half mark but can be 10 minutes or an hour and a half in before the freeze happens. Usually the game screen freezes and the mouse still moves for about 20 seconds. After 20 seconds the mouse can freeze too or keep moving around indefinitely; the keyboard doesn't work so ctrl alt del doesn't get me back to windows and I have to hard reboot. Sometimes sound starts repeating, sometimes it plays normally and I can hear the game continue to play in the background, despite the game appearing to be frozen. The games that have never frozen, even after 80+ hours of play are: Fallen Enchantress, Bioshock INfinite, Guild Wars 2, Torchlight 2, Kingdoms of Amalur Reckoning, The Elder Scrolls: Skyrim, Starcraft 2, Farcry 3. The games that freeze in the under an hour and a half mark are Neverwinter (MMO Beta), Might and Magic Heroes VI, Path of Exile (maybe more in the future?)
If I go into event viewer, no errors are recorded, other than the "Critical" error from the hard restart alerting me of a loss of Kernel power. All drivers are updated to the newest, BIOS is the most recent version. The locking in the above games has plagued me for ages but the new 3DMark11 message has not: it started yesterday and there have been no hardware changes or software changes other than Windows Defender definition updates (the small 200kb ones). There are no freeze-ups, no problems whatsoever within windows itself.
EDIT: Upon checking event viewer again, there is a log for when Might and Magic Heroes VI crashed:
Faulting application name: Might & Magic Heroes VI.exe, version: 220.127.116.11, time stamp: 0x5065b41f
Faulting module name: Might & Magic Heroes VI.exe, version: 18.104.22.168, time stamp: 0x5065b41f
Exception code: 0xc0000005
Fault offset: 0x007e193c
Faulting process id: 0x1768
Faulting application start time: 0x01ce3aa561d947e2
Faulting application path: C:\Program Files (x86)\Steam\steamapps\common\Might and Magic Heroes VI\Might & Magic Heroes VI.exe
Faulting module path: C:\Program Files (x86)\Steam\steamapps\common\Might and Magic Heroes VI\Might & Magic Heroes VI.exe
Report Id: 3ad2cfea-a699-11e2-bf24-0026833c2657
Faulting package full name:
Faulting package-relative application ID:
Event Viewer then identifies it as a 0x80000000000000. Application Error with an EventID of 1000.
If I open CPU-Z, the first time it's opened will result in an error with the following info in the "cpuz_driver_1260.log" (including this in case it's relevant to my other problems):
[bInitDriver] m_szFilename = cpuz136_x64.sys
[bLockDriverHandle 15:59:04] WaitForSingleObject error = 0
[WinNT_bInstallDriver 15:59:04] szMachineName = AVENTUM
[bExtract_SYS] Extract C:\Users\Landon\AppData\Local\Temp\\cpuz136\\cpuz136_x64.sys
[WinNT_bCreateService] szDestName = C:\Users\Landon\AppData\Local\Temp\\cpuz136\cpuz136_x64.sys
[WinNT_bCreateService] CreateService failed, error code = 1073
[WinNT_bStartService] StartService failed, error code = 3
[bDeleteFile 15:59:04] DeleteFile returned = 1 (error = 0)
[bDeleteFile 15:59:04] RemoveDirectory C:\Users\Landon\AppData\Local\Temp\\cpuz136\ returned = 1 (error = 0)
[bInitDriver] bInitDriver returned 3
[vCloseDriver 15:59:04] WaitForSingleObject error = 0
[WinNT_dwStopService] OpenService failed, errorcode = 1060
[WinNT_dwDeleteService] Openservice failed, errorcode = 1060
[vCloseDriver] CloseHandle(mutex) = 1
After this error, the CPU area of cpu-z appears blank.
Now if I re-open CPU-Z, there is no error and it works fine, displaying all relevant PC information and that error will not happen again until the computer is cold started. If I shutdown and immediately power back up the error wont appear. If i shutdown and power back up, say, 6 hours later, the error will appear.
Again, overclocks benchmark perfectly for days (using heaven 4.0, linpac x, memtest 86, windows memory diagnostic, and used to work on 3dmark 11 before above error) but issues persist with overclocks totally disabled. No idea if it's hardware or software related, this is what I desperately need help discovering.
CPU: Intel Core i7 3960X (4.5ghz)
GPUS: GTX 690 x 2 in quad SLI (+50 core mhz)
Ram: 16GB Corsair Vengeance 1866mhz
HDD: 2 Corsair Force GT 240GB in Raid 0
Motherboard: Asus Rampage IV Extreme
My main fear is that something is going on somewhere that could get worse. While the game library affected now isn't seemingly huge, I only have a limited number of games (described above) to test it on. I'm afraid of the number of games in the future that this problem may plague. This is a gaming PC, so it's not much use to me if it can't play games.
Any input as to these issues would be greatly appreciated. All hardware has been reseated, all drivers and BIOS is fully up to date, issues persist with clean booting (disabling all services and startup programs).