which 18.x driver is best for phoenix?
Just tried 18.6.1 on 3-card pc, and all cards started to mine with 16MH - both with Claymore and Phoenix...
Did you forget to switch the compute mode ? 16MH/s looks gaming mode to me.
The tool said all are in compute :/
Graphics mode is ~20-22.
The weird part was that frontbus was maxed ad 68% according to Afterburner
With all the AMD drivers with compute mode I've used, I've never seen a lower hashrate in compute compared to gaming.
Using win 10 or win 7 ?
Front bus should be 100%
Did you disable SLI / crossfire in your mobo bios ?