I am needing to know what kind this is and if it will work for my pc which is a 1999 custom built...I understand that 1998-back are called ATX or something??? I am needing the newer one and hoping this is it.. ALso, I am needing this one and an ATX, if someone has one that they will give away as long as it works I will pay shipping....let me know, so if this is the 1999-newer I will be needing a ATX or w/e one...lol annyways help!