Best driver for amd 390/470 on the same rig

please help me to choose the driver version for a mixed rig. what version do you use? tried different versions of 16.x, different problems, maybe that arise from other issues, can’t know for sure. they should work together, just don’t remember what version i used before

They are two different chipsets, there isn’t an optimal driver for both at the same time. quoting from the readme
Catalyst (Crimson) 15.12 is required for best performance and compatibility.
15.12 does not support some Fiji cards, use 16.3.2 for them.
For 4xx cards (Polaris) Crimson 16.12.2 is recommended.
NOTE: For best performance on Fiji cards you must use 15.12 or 16.3.2 drivers. For newest drivers speed will be slower!