I've recently received my 6800xt and it works great, but it uses 50 Watt of power when in idle. That is if I enable Desktop recording on the Instant Replay feature. Now I've read up about this, seems like there is no way to fix this and it's kind of a "feature" to make sure I have an 'optimal' experience. (Even though having a useless high power draw is far from optimal)
But I didn't have this problem with my Vega 64, that used 18 Watt in idle with the same settings. That's just weird.
I really wish you guys could have a look at this issue. It's really not necessary to consume this much power when idle, you could do it with vega. Why not with Navi?
Interesting find, just tried it myself.
Send a bug report.