I'm looking at a pair of IEM that have 80 ohm resistance.
Will the Mi 5 with EU rom from here be able to deliver enough power?
Only thing ive found so far is that the DAC in the Mi5 has up to 4W power.
Will be a close one. Can't you go to a store and test it out? Most shops (like the Media Markt) let you do test them, especially if you ask nicely. Just pick two 80 Ohm pairs (just to be sure) and listen.