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I've got a Geforce GTX 660Ti

It's been running fine for 5-6 weeks. Today I launched Left4Dead2 and got 7-8 FPS (usually a rock solid 300 even at the busiest moments).

In case of driver/software issues, I reinstalled Steam, applied all outstanding windows updates, reinstalled the graphics driver (clean install) and finally (after validating local files) reinstalled L4D2.

Now, I've got a slew of problems...

  • Launching a 3D app (Anything vaguely modern) causes an immediate crash
  • Viewing a site which uses WebGL works fine (http://lights.elliegoulding.com/ works fine)
  • GPU-Z works fine (GPU load < 5%)
  • Nvidia System monitor crashes after a couple of seconds
  • L4D2 crashes immediately
  • Tropico 4 crashes immediately
  • The longest journey runs fine
  • Skype works fine until I turn on my webcam, then crashes immediately
  • VLC crashes after 10-20 seconds
  • Win7x64 aero glass works fine

Looking at the event viewer, provides a number of problems associated with the crash...

Skype

Faulting application name: Skype.exe, version: 6.6.0.106, time stamp: 0x51c414b3
Faulting module name: KERNELBASE.dll, version: 6.1.7601.18229, time stamp: 0x51fb1116
Exception code: 0x80000003
Fault offset: 0x00013219
Faulting process id: 0x748
Faulting application start time: 0x01cec5fcd7006ca4
Faulting application path: C:\Program Files (x86)\Skype\Phone\Skype.exe
Faulting module path: C:\Windows\syswow64\KERNELBASE.dll
Report Id: 73d21ec0-31f3-11e3-abde-1c6f65cec842

L4D2

Faulting application name: left4dead2.exe, version: 0.0.0.0, time stamp: 0x52262a0b
Faulting module name: tier0.dll, version: 0.0.0.0, time stamp: 0x52262908
Exception code: 0xc0000417
Fault offset: 0x00022264
Faulting process id: 0x23cc
Faulting application start time: 0x01cec60004dfe146
Faulting application path: D:\Games\Steam\steamapps\common\Left 4 Dead 2\left4dead2.exe
Faulting module path: D:\Games\Steam\steamapps\common\Left 4 Dead 2\bin\tier0.dll
Report Id: 475ab7b2-31f3-11e3-abde-1c6f65cec842

Nvidia Monitor

Faulting application name: NVMonitor.exe, version: 6.2.13.1, time stamp: 0x48a9a323
Faulting module name: unknown, version: 0.0.0.0, time stamp: 0x00000000
Exception code: 0xc0000005
Fault offset: 0x0000000200000000
Faulting process id: 0x1200
Faulting application start time: 0x01cec5feb3eb4ce7
Faulting application path: C:\Program Files (x86)\NVIDIA Corporation\NVIDIA System Monitor\NVMonitor.exe
Faulting module path: unknown
Report Id: fbfc9425-31f1-11e3-abde-1c6f65cec842

How can I diagnose what is causing the problem? Is it definitely a graphics card problem?

GPU-Z

enter image description here

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Interesting. Is your processor at least a Sandy Bridge? If so, try using its iGPU for video and disconnect your main GPU and see if you're still experiencing the same issues. –  happy_soil Oct 10 '13 at 22:04
    
@Basic Are you by chance using an MSI PE card? –  Louis Oct 10 '13 at 22:05
    
Processor is an i7 2600K. I'll give iGPU as spin as soon as I google it. @Louis It's a Geforce GTX 660Ti - as mentioned in the first sentence. –  Basic Oct 10 '13 at 22:12
    
@Basic I know, there was a bug with one of MSI's versions of the model. –  Louis Oct 10 '13 at 22:13
    
@Louis Apologies, my fault for not spotting the thrust of your Q.. It's a Gigabyte GTX 660Ti OC. I'll attach a GPU-Z screenshot –  Basic Oct 10 '13 at 22:15

1 Answer 1

up vote 2 down vote accepted

So.... Turns out that when developing an app which uses DirectX, I'd flipped DirectX into debug mode - slow but it provides details of problems.

Since I hadn't swapped it back, some apps (OpenGL based) ran perfectly, some ran slowly (L4D2) and some just failed entirely.

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