I think it's worth noting the original Crysis still runs quite badly even on today's top end PC's because the game was coded for extremely fast single threaded performance.
Ah, so that's why it plays pretty smoothly (years later of course) even on a NUC with 4GHz Kaby Lake i7 and Iris Plus Gfx. The i7 has good single threaded speed and the Iris Plus is fine for a 2007 game. Even *the* 2007 game.