Random Crash & Stutter Sound

well, a lot of things could be happening.

did you recently install or upgrade your hardware?

did you recently install new drivers for something?
if so, try uninstalling those drivers and move to an older version.

try running demand tests like 3dmark06 and prime95. if your computer freezes on 3dmark, it's probably a gpu problem. if it freezes during prime95, then it might be a cpu problem.

i don't know any good ram tests. however, you may have gotten a bad stick: try using one stick if you have two, or try them in a different computer and see what happens.

also, try running your game a bunch of times with different hardware; take out the sound card one time, stick of ram next, video card (if you can replace it with another or use onboard graphics), etc.

keep running tests and/or removing hardware and testing it on other pc's if you can until you find a config where your pc won't freeze, or you find hardware that's failing.

also, check your system temperatures. does the pc freeze after a certain temperature is reached?