This time of age, U need dual CPUs so get a dual pentium d, xeon or opteron with new everything and transfer the files over.
ya we do plan on getting a new server but for now it's freezing and we cant get any work done. Even if we order now it'll still take a few days to arrive.
If your just going to do it as a temp solution, then I would say just swap the harddrive into another computer, but I def would get a new one soon and move the files to the new harddrive, as once something starts failing in a computer, other things start going one by one from most of my experiences. But as a temp thing yeah just swap the harddrive to another computer for the time being.