Näyttiksen muistissa luultavasti vikaa, tai sitten ihan vaan muisteissa.
"Unfortunately, there's not much you can do about bad video RAM. It's soldered to the video card and the video card manufacturers normally replace the whole card rather than try to rework individual chips. Sometimes you can make the symptoms go away by having an extra fan inside the computer blowing air past the video card. If it's an overheating problem then you can occasionally improve your situation by epoxying RAM heatsinks to the RAM chips but usually heatsinks don't help. Sometimes underclocking can help. But most of the time bad video RAM is permanently damaged and you just have to replace the video card. "
