I've played it on my 3.0ghz, 1 gb, 256mb 9800XT machine running DX9 and all settings low; it was very "meh"-ish to say the least; though I did have fun for a while after hacking the console vars to give me unlimited suit power, ammo, speed, etc.
Really, it just looks like a graphical upscale of a prev-gen EA game (BF2), like most EA games tend to be.
Not to mention the story line sounds like it was created by a 15-year-old with a lot of hollywood rock-em-sock-em, campy, ballyhoo, sensationalistic mindlessness: The year is 2020 and the US has just developed a top-secret next-gen Mobile Infantry Armour System (with some pretty unique capabilities)... so what do they decide to do with this multi-billion dollar pinnacle of U.S. Warfare technology (which amounts to an otherwise decent storyline hook/gimmick thus far)? I know, lets suit up seemingly untrained, unprofessional ruffians Rae-Rae and Tommy Dick (a british guy in the U.S. Special Forces?), then put them under the command of an uber-cliche, stereotypical no-nonsense, tuff-guy sergeant type (like we haven't seen that one before?) and then I know! I know! let's throw GIANT TENTACLE SPACE MONSTERS at them when its all said and done.
Wow... this is going to be a serious case of all beauty and no brains. I think the only reason to get this game is if your a graphics-slut (which admittedly I am, but not at the expense of getting a new rig).