2015-07-24, 04:06
Presumably because the H264 block was needed by something so became active, however I have noticed that when it is no longer being used there are times when it will remain "on" (in your case, at the lower idle frequency) rather than switch back down to 0MHz. Try playing an H264 movie, then stop playback, and see if the H264 block eventually goes back to 0MHz.
