What is CPU tier & generation?
The chip family (i5/i7, Ryzen 5/7, M-series) plus how new it is.
Short answer
U/低-power suffixes are efficient, H/HX are fast and hot. Match the suffix to your use, not the number.
CPU tier & generation when buying a laptop
The chip family (i5/i7, Ryzen 5/7, M-series) plus how new it is.
Why it matters: A current-gen mid chip beats a two-generation-old high-end chip on battery and heat.
Look for: U/低-power suffixes are efficient, H/HX are fast and hot. Match the suffix to your use, not the number.
Full Laptop buying guide