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The AMD Ryzen 9 5900HX romps home on Geekbench and may even allow for overclocking

The HX series is a new one for AMD. (Image source: AMD)
The HX series is a new one for AMD. (Image source: AMD)
The Ryzen 9 5900HX has hit Geekbench, confirming several aspects of the upcoming Zen 3 and Cezanne APUs. The 8-core APU will be part of a new series for AMD, and one that may overclockable.
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A South African retailer may have just revealed AMD's plans to release a Ryzen 9 5900HX, but the APU has also appeared on Geekbench. According to the benchmarking website, someone has tested the Ryzen 9 5900HX in an ASUS ROG Zephyrus GX551QS - a 15.6-inch machine that will also feature an RTX 3080 mobile GPU.

While the listings on Pinnacle do not offer any details on the Ryzen 9 5900HX, the Geekbench listing does. Apparently, the APU has eight cores, supports Simultaneous Multithreading (SMT) and has a base clock of 3.3 GHz. Additionally, the APU boosted to 4.59 GHz during the benchmark. If both frequencies are correct, then this would mean that the Ryzen 9 5900HX has 300 MHz higher base and boost clocks than the Ryzen 9 4900HS.

Moreover, the upcoming APU has 16 MB of L3 cache - double the volume that Renoir APUs have. Geekbench confirms that the Ryzen 9 5900HX belongs to the AMD 'Family 25 Model 80 Stepping 0', which should make it a Cezanne chip. HX APUs would be a new addition to AMD's mobile offering, but there are no details on what would separate them from the H or HS-series. Tom's Hardware and Wccftech speculate that HX APUs would be overclockable, as Intel's HK-series processors are.

The Ryzen 9 5900HX scored well in Geekbench too, even at this early stage. Its single-core score of 1,423 points is a significant improvement on Renoir APUs, which typically score between 25%-30% less. The multi-core score of 6,912 is underwhelming, but we doubt that this will be representative of retail Ryzen 9 5900HX APUs.

(Image source: Geekbench)
(Image source: Geekbench)
(Image source: Geekbench)
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Alex Alderson
Alex Alderson - Senior Tech Writer - 3834 articles published on Notebookcheck since 2018
Prior to writing and translating for Notebookcheck, I worked for various companies including Apple and Neowin. I have a BA in International History and Politics from the University of Leeds, which I have since converted to a Law Degree. Happy to chat on Twitter or Notebookchat.
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> Notebook / Laptop Reviews and News > News > News Archive > Newsarchive 2020 12 > The AMD Ryzen 9 5900HX romps home on Geekbench and may even allow for overclocking
Alex Alderson, 2020-12- 6 (Update: 2020-12- 6)