R9 390 would do me fine, however 80-watt multi-monitor idle is absurd. However, if this GPU is closer to the 20-watt mark (like Fury X,) on multi-monitor idle,
Yea, if just doing on a dual or triple panel it's not great, but I believe that number is just that amount of time when you’ve walked away, while before entering sleep mode so your talking 10-20min which is fairly typical today. When performing normal email, web-browsing, YouTube, word processing etc. (aka non-stress 3D) I'd consider there not much different between either GPU provider. When in "sleep" AMD ZeroCore is shown to drop to around 2-3W, while not exactly sure how low Nvidia gets down during sleep, I kind of recall it’s still pulling about the normal Idle Watts.
I can never seem to find the one review site I've come across in the past that has indicated "monitor-off" (or they do it selectively) and I’ve yet to see any review this round providing "monitor-off/Sleep" numbers for a FuryX vs. the competition.