Honestly, I would not run a new build with that power supply. Seems to me as a ticking time bomb, have not heard of that power supply brand. In addition, you forgot to count capacitor aging. 5 years of usage will probably mean your power supply has lost its initial wattage. If you are buying a new power supply then go for Antec, XFX, Seasonic, Corsair, PCP & C and other good power supply brands.