Ryzen 2000h significantly increases the tdp compared to ryzen 2000u

AMD introduced the APU Ryzen 2000H series for conventional notebooks. These chips are physically identical to Ryzen 2000U series chips designed for ultraportables and convertibles; but they come with higher CPU clock speeds, and therefore a higher TDP. The range includes two models, the Ryzen 7 2800H and Ryzen 5 2600H, both based on the same 14nm "Raven Ridge" silicon as the Ryzen 2000U series.

Ryzen 2000H series increases its TDP compared to Ryzen 2000U

The 2800H features a 4-core, 8-thread CPU, with 512 KB of L2 cache per core, and 4 MB of shared L3 cache; with clock speeds of 3.30 GHz, and a maximum boost of 3.80 GHz. The iGPU is a Radeon Vega 11, with clocks up to 1.30 GHz. R yzen 7 2700U has very similar specifications, but only differs in speed from 2.20 GHz nominal clock, and one of the 11 Vega NGCUs is disabled. 45W by default with a TDP configurable to 35W for the 2800H; while the 2700U has a TDP of 15W, configurable to 12W. How is this possible if you only increase the clock speeds?

History repeats itself with the Ryzen 5 2600H. This chip has the same 8-core 4-core CPU configuration as its Ryzen 7 counterpart, but with lower CPU clocks, and a slower iGPU that only has 8 NGCUs that translate to 512 stream processors, with clocks at 1, 10 GHz. The CPU runs at nominal 3.20 GHz with a maximum boost of 3.60 GHz. The Ryzen 5 2500U, again, only has lower nominal clocks at 2.00 GHz, and even has the same settings for its iGPU.; but the difference in nominal TDP is huge: 45W vs. 15W.

How is it possible that activating a few components or increasing nominal clock speeds has such a tremendous impact on the TDP with the Ryzen 2000H series? Maybe there are other adjustments under the hood that we are not seeing.

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