Cross Fire works on Strange Brigade
I finally started moving my steam folder over to a 1Tb Seagate Passpost and had the chance to usb it with my x58 and a pair of RX 570's on driver 19.4.1.
I find it works in both Vulkan and DX12 for me .. my issue is system ram as 6Gb is all I have until the other 12Gb get here as ReLive pulls me down some in the fps area by 20 or more .
Xeon X5660 @4.2Ghz
EVGA x58 3way Sli rev 1.2 bios 83
OCZ Gold ram 6 Gb
Corsair 950 watt powersupply