AquinusR9 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,

the54thvoidDoesn't counter my point. Both Asus and Sapphire cards say 'up to' so it is entirely feasible the two settings are for sub 1000 and 1000. If it ran faster than that it would use it in PR.

the54thvoidThe other option is its a power unlimiter but even then, I'd suggest logically that it means its clocked below 1000 on stock.

If we were mean, we’d answer the above question with "basically nothing." The second firmware is intended for overclockers, but its inclusion is questionable for a graphics card with so little frequency headroom. Other than the marginally higher power consumption during gaming, there’s barely any difference to be found between the two BIOSes.

FluffmeisterSeems to trade blows with the GTX 980 depending on settings used, consenus seems to be it's too expensive though, especially now custom 980's can be had for much cheaper these days.