The 24 pin main power connector was added in ATX12V 2. Molex KK 4809 Crimp Terminal Contact, Female, 0.05mm² to 0.35mm², 30AWG to 22AWG, Tin Plating. You will see the solder goes white & powdery. PSU Modular Connectors Molex Connectors 4 Pin RJ45 / RJ11 / K1 / RS232 Connectors SATA Connectors Switches USB Connectors Standard 4.2mm Pitch ATX Header Connector Datasheet.

If you don't believe me solder a stranded wire & then pinch it tightly with some pliers. This is particularly dangerous if the connection is passing a high current & can cause fires in really bad examples. A 12600K will probably reach around 140-150 watts in benchmarks, which means its barely consuming half the maximum capability of a single 8. You get a phenomenom called cold flow, where the solder changes it's molecular properties under stress & moves making the connections loose. The 8 pin cpu connector is supposed to be rated for minimum 7A per pair of wires, so at least 28A of current because theres 4 pairs of wires. I also never solder a wire that is being used in a compression connection like a screw terminal for example. CLIK-Mate connectors feature a positive inner locking system. CLIK-Mate connectors are available in three pitch sizes: 2.00, 1.50 and 1.25mm to meet various high-density application needs. The power pins are 3mm apart whereas the pitch on the existing 6-pin. the 12VHPWR power connector doesnt adhere to the MicroFit Molex standard. Dsub crimps are more expensive than solder ones but they take less time to do so if you are getting paid there is not much between them cost wise. Molexs CLIK-Mate system is ideal for devices that require connectors with robust features and the ability to carry more signal lines in less space. The 12VHPWR power connector consists of 16 pins. In the crimp Dsub if wires becomes detatched they are much less likely to short to other pins because the pins are sunken into the housing. This is why I only crimp Dsubs now, it is far superior. When you crimp the connection part of the crimp makes the electrical connection & another part crimps round the insulation of the cable which makes the connections much more resilient to movement. When you solder if the wires move at all then the connection eventually breaks because the wires become stiff & brittle. Nano-Fit Power Connectors deliver fully protected header terminals, a small pitch size color-coding/keying options that ensure proper mating and terminal position assurance (TPA) to reduce terminal back-out available in Wire-to-Board and Wire-to-Wire configurations.

16 pin molex connector