Except for new affixes from 2.5 to 3.0 (Execute DMG, Hyper Armor, etc.), which aren’t at DQ dex for some reason (???), stats caps on PVP are same: Look at PVE stat page, take your specific stat cap, then multiply it by 0.4.
Few affixes changed they caps from 2.5 to 3.0, you can find them all on patch notes: