HELP Getting AMD Radeon R7 450 working

I've done searches in the subreddit and online and I cannot figure out how to get my Dell Radeon R7 450 card working.

The R7 series is an OEM-only SKU, but it is based on Cape Verde. The EDID in Clover says it is an 8800m (which is Oland-based and can't be right). I'm currently using an Nvidia GT 710 which works fine, but I want to use the better card.

My MSI H81M-P33 motherboard allows me to set the external GPU as the only GPU, which simplifies things. When booting Clover and macOS, the card works great until I believe the part where it loads graphics drivers, then I get a black screen. I'm using "Nvidia Web Drivers Boot Flag" from Mutlibeast.

My system is set up with Clover_v2.4k_r4423 and High Sierra 10.13.4.

submitted by /u/DracheMitch
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