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The TDP of the APU is specified at 45 Watt (default) and can be configured from 35 to 54 Watt by the laptop vendor. Furthermore, 16 MB level 3 cache can be found on the chip. The dual channel memory controller supports DDR4-3200 and energy efficient LPDDR4-4266 RAM. In addition to the eight CPU cores, the APU also integrates a Radeon RX Vega 8 integrated graphics card with 8 CUs and up to 2100 MHz. However, the performance depends on high TDP settings and good cooling. In our benchmarks, the 5900HX was one of the fastest laptop processors in 2021 and on a level with the Intel Core i9-11980HK. With the increased clock speed and IPC improvements thanks to Zen 3, the Ryzen 9 5900HX should be clearly faster than the lower clocked Ryzen 9 4900H. For desktop processors AMD claims 19 percent on average and in applications reviews showed around 12% gains at the same clock speed. The new Zen 3 microarchitecture offers a significantly higher IPC (instructions per clock) compared to Zen 2. The "X" in the name indicates the overclocking capabilities of the CPU. The chip is manufactured on the modern 7 nm TSMC process.
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They are clocked at 3.3 (guaranteed base clock) to 4.6 GHz (Turbo) and support SMT for a total of 16 threads. The R9 5900H integrates all eight cores based on the Zen 3 microarchitecture. The AMD Ryzen 9 5900HX is a processor for big (gaming) laptops based on the Cezanne generation. AMD Ryzen 9 5900HX ► remove from comparison