XFX Radeon HD6570 in macOS High Sierra black screen.

Hello all. I have a Dell Optiplex 960 that I want to put High Sierra on, and I've gotten it to install without a hitch, but it refuses to display anything after boot. It seems to boot up just fine (no kernel panics), but when the screen should get to the login screen, the screen goes black (still on, but displaying nothing). I've tried WhateverGreen and Lilu with RadeonDeInit in a bunch of combinations but none of them work. The only way to boot to the desktop is in safe mode, but that boots without acceleration.

Any help would be appreciated! :)

Optiplex 960 Specs
Intel Core 2 Quad Q9505 @ 2.83GHz
4 GB DDR2 RAM @ 800 MHz
XFX Radeon HD6570
TP Link N900 Wireless

submitted by /u/Dakdot
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