You don't need specs for full system, just what G/Card is being used. As most High end FPS is due to type of rendering from the card and at what level of settings you use.
http://www.sisoftware.co.uk/?d=&f=downandbuy&l=en&a=
Use the above to bench mark your card and hardware for better performance, there is a crack for the full thing somewhere.
my old desktop loves mir3 but my lappy dont like it much as its pretty good spec ><
I have a Nvidia 8600GT and plays loverly.I was curious as to what GCards players were using that performs well with Mir 3 (most likely old GCards)
My PC is high spec.
Look at you spending money on sli!Ive got 2x GT9600's and it plays fine lol (obv).
But also plays fine on a laptop with 512ram and shared video lol.
Best thing you could do is post your specs and we might be able to help you .