Assassins Creed Odyssey requirements are not finalsed yet, but AC Odyssey will use the same game engine as AC Origins last year, with a few upgrades here and there. So expect AC Odyssey system requirements to be around an Nvidia GTX 780 or RX 470 graphics cards. Which is just a bit beyond last years AC Origins GTX 760 requirement. Put this with 8GB RAM and a older i7 or slightly newer intel i5 and you should get AC Odyssey reaching 60FPS at 1080p on high graphics settings
Assassin's Creed Odyssey is the sequel to Assassin's Creed Origins. AC Odyssey will take place in Greece, where you will forge your own Greek legendary hero story to rival Hercules himself.