My question is how would one determine which GPUs are compatible with this?
I guess any GPU that works on x8 PCIe gen 3 and can power itself from that or supply its own external power? (Datasheet says the fully loaded board is 150W btw.) You'd probably have to limit yourself to whatever has open source drivers for Linux.
I am running RX 570 with PCIe + 6-pin connector for the power. These works out-of-the-box due to open source drivers. Older Nvidia cards work too, but you would need to go with older cards as you need Nouveau driver. I believe someone recently used AMD RX 6700XT, which is a bit insane.
The bottleneck here is SoC, not the GPU. With HW decoding on the GPU I can play 4K 60fps trailers on Unmatched just fine.
I guess any GPU that works on x8 PCIe gen 3 and can power itself from that or supply its own external power? (Datasheet says the fully loaded board is 150W btw.) You'd probably have to limit yourself to whatever has open source drivers for Linux.