您有安裝CoolBits 2.0嗎？
查到這篇
http://translate.google.com/transla...Flanguage_tools
其中片段

The fact remains that I continue to have the error "Silent running: Stress test transition: L2 - > L1 "in the logs (system and 2nd mitre breakdown service of the drivers nvidia)
And I think very extremely that this log comes from an error of read/write in the video memory.

To check: Go in the observer of events (in the tools of administration) and click on system.
Seek the errors (red crosses) and look at if there are some who relate to "nv", with especially the error message "Silent running: Stress test transition: L2 - > L1 "
If you used the reg of CoolBits 2.0, you have a second mitre breakdown service in the adjustments nvidia.

如果有裝Coolbits 2.0的話，可能真的有問題吧...
顯示卡的記憶體有超頻嗎？

http://downloads.guru3d.com/download.php?det=815
Coolbits 2.0的安裝說明
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只能猜猜看了..