Multiple BSODs, different codes, related to graphics and nvidia driver

Hello!

I've been plagued by random BSODs since about July on my PC which I built in May (You can see a quick overview here: http://www.abload.de/img/capturecxs1b.png).
Now I generally have decent knowledge about computers, but I'm kind of stuck on this one (or maybe just in denial, we'll see.)

I have not found any reliable way to reproduce the BSODs yet, or found any (stress)testing utility that generates errors. Things I have tried:

- Run Memtest over night (~10 hours, 4 1/2 passes)
- Run Prime95 + MemtestG80 (Video RAM memtest from here: Folding@home - DownloadUtils) over night (about 14 hrs)
- Run multiple passes of "Video Memory Stress Test"
- Run Prime95 + Furmark + MemtestG80
- Run MemtestG80 + 3DMark11 so that all of my 2 GB of VRAM are in use
I have also run System File Checker, which did not find any errors.

None of the above has resulted in any of the programs showing any errors, crashing, or BSODs.

I did manage to get 2 BSODs with Driver Verifier enabled: One was while playing Sleeping Dogs, the other while watching a HD Video - both dumps were pointing to nvlddmkm.sys as the cause, so the nvidia graphics driver.

I have since completely removed and reinstalled the driver: Uninstall in safe mode, run Driver Sweeper, always reboot in between, and then do a clean reinstall. I realize I currently have the latest beta driver installed, but most of the BSODs are from when I was still running the 301.42 driver.
Also, the BSODs from the last 2-3 days may in some way be related to Guild Wars 2, since I have been playing that, but with the issues I was having before, I can't really be sure...

Now I have considered that my video card might be broken, but if that is the case, I do wonder why I can't seem to reproduce any error at all with all the memory tests and stresstests I have run over the last weeks, only to then get a "random" BSOD while playing a video...

My current plan of action would be to reformat my drive, do a fresh installation of windows and hope for the best...

All the information is included in the attachment, and a big thank you to everyone who is sifting through that in advance!

Welcome aboard.

► First of all, update your Citrix Deterministic Network Enhancer Miniport or Cisco Systems VPN Client from Cisco Systems, Inc, or from any other source if you know it. It is very old.

Code:

lmvm dne64x
start             end                 module name
fffff880`05226000 fffff880`05252000   dne64x   T (no symbols)           
    Loaded symbol image file: dne64x.sys
    Image path: \SystemRoot\system32\DRIVERS\dne64x.sys
    Image name: dne64x.sys
    Timestamp:        Tue Nov 11 06:31:24 2008 (4918D964)
    CheckSum:         000359DA
    ImageSize:        0002C000
    Translations:     0000.04b0 0000.04e4 0409.04b0 0409.04e4

Driver Reference Table - dne64x.sys

► A lot of your dumps indicate to DirectX Graphics MMS (dxgmms1.sys). The installed one is of Nov, 2010. Try for upgrade, if possible.

► The rest of the dumps points to Nvidia display driver (nvlddmkm.sys), updated around that time you reported your system started crashing. I would suggest you to remove all components of nvidia driver using |MG| Driver Fusion (Driver Sweeper) 1.2.0 Download in safe mode, and then install an earlier version of the driver that worked perfectly.

Let us know the results.

This one is bugcheck 10E; caused by video driver or (maybe) video memory.

It blames dxgmms1.sys (DirectX graphics MMS) so graphics driver related. This bug check is usually caused by a video driver behaving improperly.

As I have seen you have updated your nvidia driver just a few days ago, maybe it is not installed properly.

You download and install |MG| Driver Fusion (Driver Sweeper) 1.2.0 Download, boot computer in safe mode, delete all nvidia elements using driver fusion, boot windows normally, and then install a previous one that worked perfectly?

In case, for an extra caution, run Video Card - Stress Test with Furmark.

If driver is not the cause, then one think remains left, that is video memory. Furmark will help you to have some idea about it.

If possible, have your card replaced, as it is still in warranty.