RX 570, no GUI

I have a fully working Hackintosh with a 1060 GTX on 10.12.6. Trying to replace the 1060 with an RX 570. I've tried booting both my existing install and a freshly made vanilla 10.13.2+clover install USB with RadeonDeinit flag set in Clover Configurator, and in each case the boot scroll looks normal but the GUI never loads (ending with the usual red herring "Sound assertion" lines).

I've seen several reports that setting RadeonDeinit is all I should have to do get this to work. What should I try next? Any troubleshooting steps I can take? Nothing in the boot scroll looked relevant. I'm thinking tonight I'll try booting with a 1030 GT as a helper card and see if that gets me any further (not enough PSU connections for both the 1060 and 570).

Card is an MSI Radeon RX 570 ARMOR 8G.

submitted by /u/Ryan_Arr
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