I initially thought it would give the benefit of PCI cards, but all the graphics ROMS work with the 486 VLB systems too.
I was also messing with the 286, which is new for me.
Unfortunately EMM386 does not work and EMM286 takes too much base mem, but there is no other way to get EMS. Maybe an emulated EMS board would fit here.
Regarding the CPU: playing wolfenstein 3D with a SX CPU works fine. But selecting a FPU equipped DX system gives lower framerates, and slightly warped walls.
Not complaining, just having 'fun' with PCem. 😀