This 20- to 28-pin connector powers both the motherboard and the CPU.
The motherboard’s main power connection is a wide, two-row cable that fits snugly into a similar-looking spot on the board itself. This 20- to 28-pin connector powers both the motherboard and the CPU. However, some boards have one or two more four-pin or eight-pin connectors for the processor, which resides near your CPU, typically in the top corner. If you have them, you’ll need to plug them in, too.