Apple Silicon|Intel

AMD "Cezanne" Confirmed to Quadruple Max Addressable L3 Cache Per Core Over "Renoir"

At her 2021 International CES keynote address, AMD CEO Dr. Lisa Su announced the Ryzen 5000 series mobile processor family, which the company thinks has what it takes to beat Intel's 11th Gen Core "Tiger Lake" processor, possibly even its upcoming 8-core version. The Ryzen 5000 mobile processor is based on the new 7 nm "Cezanne" monolithic SoC die. This chip features an 8-core CPU based on the latest "Zen 3" microarchitecture, and its biggest change is the advent of the 8-core CCX, which means all eight cores on "Cezanne" share a common L3 cache.

AMD slides from the CES keynote confirm that the company has not only doubled the L3 cache amount compared to "Renoir," but also quadrupled the maximum addressable L3 cache per core. On "Renoir," the eight cores are split between two CCXs, each with 4 MB of L3 cache. "Cezanne" features a single 8-core CCX with 16 MB of it. The dedicated L2 cache amount remains at 512 KB per core. The "total cache" (L2+L3) adds up to 20 MB. For the 45-Watt Ryzen 5000 HX-series enthusiast mobile processors, the increased caches, coupled with improved IPC and higher clock speeds should be AMD's play against Intel's top H-segment mobile chips. AMD claims that the second-fastest Ryzen 9 5900HX beating Intel's fastest Core i9-10980HK by 13% in raw single-thread performance, 19% in game physics performance, and 35% in overall PassMark performance. The 5980HX should only end up faster.