I run with the 9250 as well. I started a thread on this a while back and researched it very extinsively, it is a problem with the video device you would be better off upgrading your card, there are threads on here that explain which cards are the best to use.
I still run with the 9250 although I just underclocked it a bit with an ATITool.
I still get the black iceburgs but very tiny hardly noticeable, that I can live with until I can upgrade.
K
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