It is single mode.
Dual mode needs more voltage to be stable and consumes 280-300watt. it is 43eth+220lbc
It is with blockchain drivers.
With 17.8.2 I was getting 41+200 at 240-260 watt
It was with win 7. With win10 and 17.8.2 I was getting only 38+200 (((
Need some time for further tuning ... but only when my air Vega will arrive.
Do you think it is more efficient than the RX 580 in terms of power consumption?
In single mode - no, until we have new miner or driver with promised 50+ mhs.
In dual mode - maybe ... but again ... current buggy blockchain drivers won't let you downvolt to 800mV keeping good speed ... so I think currently polaris cards are better even in dual mode.
see: vega is 43eth+220lbc@300watt. Good polaris can do 30eth+90lbc with 130-150watt