I think it's easier to make the 5,1 run VR. Just plug in a high end Nvidia GPU and you are good to go. Of course, CPU still limiting, however, most VR ops should be still very GPU limiting at this monent. The 3.46 GHz CPU may not able to give you 144FPS, but something like 90FPS is totally possible. I ran my 4,1 with just a 7950 and still can pass the VR test, not at the top score of course, but the result is at the playable range. By the way, it's also very easy to get USB 3.0 on the cMP.