Assassin's Creed Odyssey is less CPU demanding than Origins, no stutters, GTX980Ti can't handle High/1080p/60fps
Assassin's Creed: Origins PC Performance Review | CPU Benchmarks - Ryzen & Intel - Does Assassin's Creed Origins need a powerful CPU to perform well? | Software | OC3D Review
Could Assassin's Creed Odyssey's CPU requirements be DRM-related? Comparison to AC: Unity's | ResetEra