it seems lika a driver stuff, so i wrote here
on boot frequency are ok, on game exit same... sometimes when i heard the fan noise i check and the card is not in idle state
UVD i suppose is stopped if i have nothing open -> task manager 1 /2% with 0.94 mhz clocked cpu and from the ccc card seems is doing nothing
fun thing: yesterday after i wrote down here, i've changed the dvi port and the system seems like i'm running in a multimonitor environment (it is not my configuration obviuosly)
that can explain the 450mhz frequency, but how can i tell windows i'm not a multimonitor user?