We don't have recommended specs for PC yet but we will release these when we know. (wccftech.com)
Bungie has released a full list of recommended specs which are below, but they do stress that by the time the game launches these may well have changed. (destinynewshub.com)
If you want to now whether or not your PC can run Scholar of the First Sin, check out the minimum and recommend specs below: (vg247.com)