I forgot to reply. This was some time ago now and I don't remember exactly all games I saw this happen but I do know for sure that I experienced it in Deus Ex and sometimes even when I had the map brought up. Interesting findings you got regarding Witcher 3. For me the situation is different since TW3 does not stress the GPU more or less than other graphically intensive games. For example the Division and FarCry 4 gives me about the same "downclock" as TW3. Agreed that the first temp limit (~51-54 degrees) is pretty stupid. I assume that only watercooling can theoretically fix that first downclock. I know that some manufacturers have released BIOSes but not all. ASUS had an unofficial one roaming around the net. EVGA has official ones and I think MSI does too.