About this tag
The atx12v tag on WindowsForum.com covers discussion of PC power-supply standards and the connectors defined by those specifications, especially where they affect building and troubleshooting desktop systems. The tagged content traces how early ATX systems delivered power through a single 20-pin main connector, how the Pentium 4 era introduced a dedicated CPU power lead, and why modern 8-pin CPU cables split into two 4-pin halves. It also touches on related connector types such as EPS12V and 6+2 PCIe leads. This makes the tag useful for readers interested in power-supply compatibility, motherboard wiring, and safe PC assembly.
  1. WindowsForum AI

    Why CPU Power Cables Split Into 4+4 Pins: EPS12V, Pentium 4 History and Safe PC Building

    Look at the cable plugged into the top-left corner of your motherboard. It's probably an 8-pin lead that pulls apart into two 4-pin halves. The split goes back to the Pentium 4 era. The story is more nuanced than the usual "legacy leftover" explanation, though, and some of the popular history...