No offense, but it's common in situations like this that many use the fact that it's working fine on their rigs to discredit the intelligence of those it's not working for. Severely stuttering and/or distorted audio has been reported by others. I also easily meet the only requirements actually shown for the game and have most settings options turned off or fairly low. As well I even tried going to Low shaders and no shadows and it made no difference.
This is not a frame rate problem, something is causing the audio to loop severely and the video hitches a lot when it does. It basically sounds like rebverb on steroids. When there's no audio logs playing or crew talking I can walk or run around just fine. When such audio kicks in it becomes a nightmare though. Furthermore, an indication this is a console priented game is the fact that the files are not in keeping with those of a PC title. I doubt it will be moddable or fixable as far as audio files that are likely causing this.
Had EA beta tested this properly they'd have known it does not operate well on some hardware that's well within their requirements. My drivers including video, audio and chipset are the latest available. I also use AlacrityPC to auto shut off all background progs and non essential services. Like I said, this is not something on my end according to their requirements. I can play Crysis with this rig even with med shaders and shadows and it looks and runs much better than this game.
The character movement, aim, look and camera I could live with, it's mainly the stuttering. I adapted to RE 4's lack of proper KB/M support by using the mouse aim and KB mapping mods available and ended up playing through it several times, and trust me, that is no cake walk control wise. I even managed to get all the bottle caps with the very squirrely aiming TMP.
From the game's Readme:
"System Requirements
===================
Dead Spaceâ„¢ requires at least the following:
FOR WINDOWS XP (SP2) or Vista
* 2.8 GHz processor or equivalent
* 1 GB RAM (XP), 2 GB RAM (Vista)
* NVIDIA GeForce 6800 or better (7300, 7600 GS, and 8500 are below minimum system requirements)
* ATI X1600 Pro or better (X1300, X1300 Pro and HD2400 are below minimum system requirements)
* 256MB Video Card and Shader Model 3.0 required"