Is 400w good enough fro this?

Hey! I am planning to upgrade i5-9400f GTX 1060 6gb to a i7-8700k RTX 2070 and was wondering if 400w would be enough. I currently use 400w for the i5-9400f GTX 1060 6gb. The wattage calculator said that I'd need 484 but I have seen similar posts saying that it massively overestimates. Help would be... show more Hey! I am planning to upgrade i5-9400f GTX 1060 6gb to a i7-8700k RTX 2070 and was wondering if 400w would be enough. I currently use 400w for the i5-9400f GTX 1060 6gb. The wattage calculator said that I'd need 484 but I have seen similar posts saying that it massively overestimates. Help would be appreciated.

Specs are:
Prime H310M-K RD2.0
i5-9400F
Intel Stock CPU Cooler
MSI GTX 1060 6GB
16GB RAM
PSU: GIGABYTE 400W 80 PLUS CERTIFIED
x64 Bit
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