AMD R9 270 CROSSFIRE OVERCLOCKING ISSUES

I have two R9 270s that I have crossfired. They run perfectly fine on stock settings, even most of the time when overclocked when I use MSI Afterburner. When I use CCC I run into all kinds of issues. Anyway my main issue is my main card de-clocks itself from 1025 to 920 SOMETIMES. It doesn't close my games, blue screen or cause any major problems; and usually if I wait 10 minutes or so it will go back to my normal overclock..Anyone know why it does this? Or how I can easily change it back?

Sure it's the main (top) card?

Yeah, when I say main I mean top card.

What are its load temps? Top card usually runs warmer since its huffing some of the heat off the bottom card for its fresh air...

I cant even try to overclock my crossfired 270x. driver crashes every time I try alittle.

I use MSI Afterburner...If I try to overclock with CCC it fails every time.

- - - Updated - - -

EarthDog Load temps are fine...Everything is fine, it just seems my top card de-clocks to 920mhz sometimes. Specifically when I alt+tab out of a game or something weird like that.