Intel’s 9th-gen gives the Core i7 a demotion in threads, but a promotion in actual cores.

Core i7, the boss wants to talk to you.

The good news: you got a promotion and a bump from six cores up to eight cores in Intel’s 9th generation CPU lineup. Woo-hoo! The bad news: Turn in your Hyper-Threading, because the cool feature that gave you virtualized CPU cores and about 30 percent more performance is gone.

Yup. If you’re freaked out about the Core i7 losing a premier performance-boosting feature that it’s offered since, well, there was a Core i7, you may well be right to be concerned. But you may not be, too, depending on how you use your computer.
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https://www.pcworld.com/article/3311519/components-processors/intel-9th-gen-core-i7-lost-hyper-threading.html