u/Fun-Account4248

I own a HX 750 which is very old (it came with a 4770k) i don't need more wattage but should i change it, i am worried that it's age could mean it could deliver poor power to my other components and kill them or reduce their longevity

1. should i change it ?

2. I am missing a special blue 8pin pcie power cable, where should i get it ?