> I'd like to add a second GPU for MorphOS and linux. Can
> someone please recommend the option to enable triple booting?

- HD5870, HD6870, HD7670, HD8490 or R5 235X/310 if you can live without 3D and overlay on MorphOS
- HD2900 XT, HD3870, HD4890 if you can live without 3D on MorphOS
- X1950 XTX for everything (except Warp3D) supported