nVidia Display Driver Stopped Responding

[oimi]

Hello, I've been having awful problems trying to watch anything using Windows Media Center and BBC iPlayer (flash-based streaming player). I'm using Windows Vista Home Premium and running a BFG 8800GTX OC2 768MB GDDR3 Dual DVI HDTV Out HDCP enabled PCI-E Graphics Card using a liquid cooling system and exhaust fans.

I've checked the temperature of the GPU (56°c) and downloaded the latest drivers; still having the same problems. Could someone please help me to resolve this issue?

Examples of the issue:
Image of issue

Video of issue

[TAKTAK]

hook a fan up and hold it so it blows onto the vRAM, see if it changes anything.

[oimi]

Thank you very much for your response.

I'm using a liquid cooling GPU heatsink so the vRAM is not exposed to do this. I am assuming it is the vRAM that needs cooling on the GPU.

[TAKTAK]

Try underclocking the card to see if it has any effect.

[oimi]

How do I go about that?

[TAKTAK]

You can do it by using rivatuner: http://downloads.guru3d.com/RivaTune...nload-163.html

just drop the memclock and core clock back to their stock speeds for an 8800gtx

[oimi]

Right, I've downloaded and installed RivaTuner, I've looked on google for clock speeds (but found nothing for this model). Could you please tell me what to change them to? Thank you.