@carvedeye
it should work, yes, but you'll need additional files from acube to use it. the original SAM boards weren't really designed to use an additional graphics card, but it is possible. download
this archive before installation of a 9250.
however it won't be any more performant than the on-board radeon M9. on the contrary it will probably be slower, but not by much. if your main interest is increasing the amount of available video memory (against the built-in 64MB), it might make sense. but otherwise you'd probably be happier with your on-board video.
let us know what you decide and how it goes!
-- eliyahu