IDE drives

Hi ! So a friend of mine brought me his faulty pc an old Pentium 4 , hoping i could restore it , I tried my best with it fixed some issues like the long continuous beep by swapping the ram module , replaced a dead CMOS battery ...but the only thing that drove me crazy was the indetectd ide...

I've been having this problem for the past couple weeks, where occasionally games will run incredibly slow, far below normal FPS along with terrible stutter, and the CPU staying between 2-3% usage (game dependent, some will have normal or only slightly lower CPU usage). System restarts will...