The specifications of AMD’s high-performance mobile processors, namely the Ryzen 5 5600H and 5900HS have leaked out. These chips are expected to be announced along with the low-power (15W) Ryzen 5000-U APUs at CES 2021. From what we already know, the next-gen Ryzen mobile lineup will be a mix of Zen 2 (Lucienne) and Zen 3 (Cezanne), paired with the 7nm variant of the Vega graphics:
First up, we have the Ryzen 9 5900HS which again will likely be a timed exclusive to ASUS notebooks. It features eight Zen 3 cores and sixteen threads, paired with 16MB of L3 cache (no Game Cache, similar to Renoir) and a max boost clock of 4.5GHz, 200MHz higher than the 4900HS.
Up next, you’ve got the hex-core Ryzen 5 5600H, with a base and boost clock of 3GHz and 4.1GHz, respectively. The L3 cache at 8MB is half as much as the 5900H, the same as its predecessor.
Then we’ve got the 5500U and 5600U, both of which feature SMT this time around, and yet the former is limited to 8MB of L3 cache. This may result in inefficient SMT performance as the two threads compete for resources. Furthermore, the 5500U is expected to be a Zen 2 design while the 5600U will leverage the Zen 3 core. The TDP too is 10W higher for the 5600U at 25W while the 5500U is limited to 15W. This indicates the ultrabook market as the primary target for the latter, with the former aimed at gamers and creators.
The Ryzen 7 5800U should be a notably upgrade over the 4800U, thanks to the use of the potent Zen 3 cores, and a 200MHz increase in the boost clock. The L3 cache is unchanged at 16MB while the TDP is set to 25W like the 5600U.
Finally, we’ve got another chip that was spotted today, namely the Ryzen 9 5900HX which features a higher boost clock compared to the vanilla 5900H/HS, and potential overclocking capabilities.
In terms of single-threaded performance, you’re looking at a 20-25% increase, in line with the desktop Zen 3 parts with mild gains on the multi-threaded front. One thing to keep in mind here is that like the Rocket Lake-S benchmark, a large chunk of the gain was contributed by the Crypto tests which means that the effective INT/FP performance will be slightly lower.