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

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.