[Cube] Need help with Cube gfx problem

[Riba]

> After using the computer for times that vary between 5 minutes and  
> an hour
> this screen always reappears. What's interesting is that only the  
> gfx are
> messed up; the Cube contines to run as normal in the background.
>
> The room is always kept to 72 or 73 degrees.
>
> Does anyone have any suggestions as to what might be causing this?

Ok, after reading your message again I see that the kernel panic are  
gone after you removed the geforce card. It looks simple really -  
your Radeon is most probably damaged as well, and the kernel panics  
were caused by the geforce card overheating. Replace the cooler on  
the geforce card and try it again.