I have decided to make my old pc to work. I bought a new motherboard( asus p5 kpl se) and used processor of core 2 duo 3.1ghz ( e8500) Ram 4gb ddr2. I assembled all of the components but the performance is too much laggy. 1st I installed windows 10 then windows 7 2nd gen then old version of windows 7. the performance on all windows is same. Can somebody help me?