MB supports both 8-pin and 4-pin connectors for CPU power.
MB supports both 8-pin and 4-pin connectors for CPU power.
The 8-pin connector is essential, while the 4-pin is optional and doesn't matter much unless you're pushing your CPU to LN2 overclocking. The 8-pin already handles 384W, which is more than enough for any processor on the system. Most quality power supplies include an 8-pin, and some even have a 4+4 pin as well. These are the EPS connectors.
If you have an extra 4-pin connector available, proceed. It helps lower resistance by distributing the current across more wires, though it's not essential. The 8-pin offers significantly more power than needed. Since the motherboard includes it, if your PSU can handle it—saving you from buying another cable that wouldn't be useful—go ahead and use it.