AMD winds up Zen 6 cores for faster clock speeds
Chips boast up to 256 cores, clocks up to 5.3 GHz, and IPC gains of 20-31 percent, just not all on the same SKU
AMD has unveiled its latest Zen cores, which show a 27 percent improvement in instructions per clock (IPC) across AI and server workloads. These cores will power the next-generation Ryzen processors in desktop and mobile PCs, with clock speeds ranging from 4.1 to 5.3 GHz. The company is focusing on three key factors for CPU performance: power, IPC, and clock speed, and the Zen 6 cores have shown significant gains across all three areas, making them one of AMD's biggest generational jumps yet.
There are two types of Zen 6 cores: a frequency-optimized variant (Zen 6) and a density-optimized version (Zen 6c). Both share the same ISA, with clock speed being the main differentiator. Despite this, a 4.1 GHz Zen 6c-based Venice Epyc is expected to deliver performance on par with a Zen 5-based Turin Epyc running at 5 GHz, showcasing a substantial jump in performance.
AMD's Mike Clark attributes this performance improvement to optimizations in the front end, the distributed scheduler in the out-of-order pipeline, and subtle changes in the backend that benefit vector-heavy workloads, such as AI. The Zen 6 cores now natively support FP16 datatypes, improving performance for AI workloads. Additionally, the core now performs four AVX2 or two AVX-512 loads per cycle, enhancing throughput for legacy applications.
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