Graphics RSOD when playing games.

I have an issue when playing games, after about 5-10 second the fan on one of my GPU's starts to run at 100%, the game freezes then I get a RSOD.

 

What is an RSOD?

 

That. ^

 

Wow, I didn't know they still existed.

Thanks

 

What's the error code?

And if you swap the GPU's around, does the fan spin at 100% on the same card?

 

I thought that, they was a setting to change the colour to any one of 16.

http://www.sevenforums.com/crashes-debugging/81288-blue-screens-0x109-critical_structure_corruption.html

 

Have you tried with one memory stick at a time?

 

Thanks guys as it turns out I took the offending card out and it was filled with dust causing it to over heat. I need to clean my PC more
Just one more question do you guys have any suggestions for cleaning it, I was just going to take off the heat sink bath it in rubbing alcohol dry it and put it back together with new thermal paste. That a good plan or is there a better way?

 

Compressed air is popular afaik, not done cleaning of that order.