Hi. I am looking to buy a new computer and have found a Dell and a Custom build PC.

The Dell has 375w Dual Rail PSU.

The other one has 1000w Five rail PSU.

I need this computer for video editting and animation. I am drawn to the Dell for other reasons but i want to know if 1000w would give substantially better speed and performance.

Does the PSU really make that much difference? Thanks.