They're great if you have a recent (<10 years old, starting with the Radeon HD 7000 series, released in 2012.) video card which are supported by the AMDGPU driv

They're great if you have a recent (<10 years old, starting with the Radeon HD 7000 series, released in 2012.) video card which are supported by the AMDGPU drivers. Rock stable and good performance. If you have a 10-15 GPU, which are supported by the older, but still open source, radeon drivers they're meh. They're stable but the performance is very poor. (they also lack vulkan support and I think you're limited to opengl 3.x but that's as much because of the hardware as the lack of driver support) (when I say the "performance is poor" I don't just mean that it's 10+ year old hardware and Moore's law has passed it by. I mean the drivers were poorly optimized, and the chipset itself spent a lot of time idle/doing redundant work, even when the graphics card was the bottleneck. The same card playing the same game in Windows would get higher framerates because the Windows drivers were better optimized.) If you have a 15+year old GPU supported by the fglrx drivers they are (were) bad. Extremely flakey, crashed all the time. AFAIK AMD has long since abandoned them, and if you have a driver that requires the fglrx drivers, you're probably out of luck. For all intents and purposes these cards are expensive, power hungry VESA cards.