My son in law is a journey level construction electrician.. He called and told me “tested old PS and took it our and took it down to get new one of same power, 450 watts. NOW he is not sure other then MB pins.. which plug goes to which device.. CD,HD,Floppy, etc.. as NO instructions in the box with PS. Am not 100% sure on this one as seems to me PS hooks up to all with no particular ID per out put and input to device. They plug in and go, most are the std 4 pins to devices.. and the other one is that is different he remember where it goes. So comes down to his asking is there a special out put connection for each device? I do not know as have not installed PS since a 486 update.. SO what do we tell him. Unit is a OKIA and MB hooked up fine..but rest CD, Floppy CD Write HD and such??? I prefer not to tell him something that causes smoke out of case?