You've got a relatively limited selection of benchmarks for Linux, but I'd probably look towards Indy3D, Maya 3 Test Center, and SpecAPC as being reasonably good Pro3D benchmarks for Linux.
I'm not altogether sure what you mean by tests "like 3DMark"... are you implying your looking for benchmarks of gaming performance? If so then you'll be hard pressed to find any that the FireGL 2 is compatible with. While still a very respectable board for 3D Animation, CAD, and to a somewhat lesser degree for DCC, scientific visualization apps it's hardly a graphics card that's going to perform at all well in any game as I'm sure your aware.