RandomQ,
Have you tried to go higher then intensity 13? Also is the card voltage locked? I'm thinking about ordering a couple myself.
No, I've always run my cards at I13
I'm pretty sure its voltage locked, But not 100% afterburner needs an update its still showing is as a 7900 series
Not locked...you have to use GPUTweak, a modded version for voltage unlock. You can also flash other modded bioses, for higher voltage which isn't smart for mining though.