What do U, H, and HS mean in AMD Ryzen mobile CPUs?

Asked 30-May-2022
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AMD H Series processors – found in high-performance laptops aimed primarily at gamers. H SKU laptops have a higher 45W Thermal Design Power (or TDP). TDP is the amount of heat dissipated by a chip while working that can be effectively pushed out by the cooling system.
AMD HS Series processors – The HS SKUs are less powerful than the H SKUs. However, HS SKUs consume less power than H SKUs. HS has a lower TDP of 35W, which is ten times less than the 45W TDP offered by AMD H Series chips.
AMD HX Series processors are mobile processors with more than 45W TDP that offer slightly higher performance than other standard H series chips. The Ryzen 9 5980HX leads the new class of the Ryzen 5000 series, offering 'elite-level' performance over other H series chips, and is closely followed by the Ryzen 9 5900HX.
AMD U Series processors – AMD U Series processors are mobile chips that power ultrathin and ultraportable laptops for increased productivity and battery life.