If you could play 1.0 as unplayable then I dont see how you cant play ARR as unplayable

In this case you have a better unplayable score lolol

You can also try things like window mode smaller resolution then your actual desktop, turning off shadows, and other bells and whistles, grass and stuff - should add to the FPS. But if you could play at 250... however choppy that may be.. then probably in ARR too lol

Also do you have two GPUs (sli/crossfire)?