The AMD Ryzen 9 5900HX is a processor for big (gaming) laptops based on the Cezanne generation. The R9 5900H integrates all eight cores based on the Zen 3 microarchitecture. They are clocked at 3.3 (guaranteed base clock) to 4.6 GHz (Turbo) and support SMT for a total of 16 threads. The chip is manufactured on the modern 7 nm TSMC process. The "X" in the name indicates the overclocking capabilities of the CPU.
The new Zen 3 microarchitecture offers a significantly higher IPC (instructions per clock) compared to Zen 2. For desktop processors AMD claims 19 percent on average and in applications reviews showed around 12% gains at the same clock speed.
In addition to the eight CPU cores, the APU also integrates a Radeon RX Vega 8 integrated graphics adapter with 8 CUs and up to 2100 MHz. The dual channel memory controller supports DDR4-3200 and energy efficient LPDDR4-4266 RAM. Furthermore, 16 MB level 3 cache can be found on the chip.
The average 5900HX in our database trades blows with Intel's Core i9-11980HK, as far as multi-thread performance is concerned. While not much faster than the less power-hungry Ryzen 9 5900HS, this is still a great CPU for quality gaming laptops as well as DTRs and high-performance mini-PCs.
This Ryzen 9 has a default TDP of 45 W (also known as the long-term power limit), a value that laptop manufacturers are allowed to change to anything between 35 W and 54 W with clock speeds and performance changing correspondingly. The CPU is built on the relatively modern 7 nm TSMC process resulting in very, very decent energy efficiency.
AMD Cezanne (Zen 3, Ryzen 5000)
Cezanne H (Zen 3)
Series: Cezanne (Zen 3, Ryzen 5000) Cezanne H (Zen 3)