cpu hdd and ram you can move no problem. the mobo is most likely a Dell specific board so you'll have a hard time moving that without doing some mods to the new case.
for a second i thought u where making a thread about nossboost or veedubb. anyway your video card rarely takes another part with it when it dies, alltho if you power suply took out your gpu then your cpu mobo and ram could be fried. and you could move yoru system if you fidn another btx case.