Vrm motherboard
Vrm motherboard
Your Z390 motherboard supports 12 VRM pins. Connecting only 6 seems fine, but using all 12 pins is recommended for better performance. The difference lies in power delivery and stability, especially with your high-end components like the 16GB 3000MHz RAM and RTX 2080 Super. Make sure you have a compatible OC mode and proper cooling for optimal results.
These are the EPS connector types: a 4-pin EPS and an 8-pin/4+4 pin EPS. The 8-pin version already supports 384W, so the extra 4-pin isn't essential unless you're doing some LN2 overclocking. It's not harmful to add the other one if it's available, but it's definitely not necessary.