I would not expect a large difference on that platform, no. On a modern AMD system, certainly. A 2600 would likely see some benefit, but it's not likely to be worth the cost/hassle, honestly.
What kind of resolution/in-game settings are you trying to run?
With a 1050TI, AC Odyssey is going to be a 1080p/Medium title at best - that should net you 30+FPS.
1080p/Low for a near 60FPS experience.