Watt usage vs. PSU question

https://dk.pcpartpicker.com/user/yungduran/saved/qg4tWZ

The linked build has an estimated watt usage of 649W. The chosen PSU can deliver 750W.

Am I cooked with this PSU, or will the headroom of 101W be ok? Already have the PSU so would have to get a new one. Would 850W PSU be sufficient or do I have to go even bigger?

Cheers :)