AMD Zen 6c shows 16.5% higher single-core performance than Zen 5 at 4.1 GHz in Geekbench 7
The AMD Zen 6 architecture has made its debut in a new Geekbench 7 comparison. Results show that the Zen 6c core delivers a 16.5% advantage in single-core performance compared to the current Zen 5 architecture when running at similar clock speeds.
Single-Core Gains in Server Workloads
The benchmark comparison pitted the EPYC 9996—a 256-core server processor based on the dense Zen 6c architecture—against the Ryzen 7 9700X (Zen 5). In the Geekbench 7 single-core test, the EPYC 9996 scored 2,847 points, while the 9700X, running at approximately 4.1 GHz, achieved 2,444 points. This represents a 16.5% increase in overall single-core scoring.
The EPYC 9996 features 512 threads and 1 GB of L3 cache. The testing was conducted on a Dell PowerEdge R9815 server running Linux. It is important to note that Zen 6c is a specific variant designed for high-density server environments, which differs from the standard Zen 6 cores expected in upcoming consumer Ryzen desktop processors.
Detailed Benchmark Breakdown
When looking at 15 individual single-core workloads within Geekbench 7, Zen 6c outperformed Zen 5 in every category. The most significant improvements were observed in:
- HTML5 Browser (+25.7%);
- Photo Editor (+24.8%);
- Structure from Motion (+23.9%);
- Video Player (+23.6%);
The smallest gains were recorded in File Compression (+8.2%) and Clang (+8.6%).
Another comparison provided by HXL compared the Zen 6c-based EPYC 9996 against a Zen 5-based EPYC 4545P. While the Zen 5 model scored 3,064 points at 5.45 GHz, the Zen 6c reached about 93% of that score at only 4.1 GHz. When normalizing these results by frequency, the Zen 6c shows roughly 23% higher performance per GHz. However, because the processors were tested on different platforms with varying cache and memory configurations, these figures do not provide a direct measurement of IPC (instructions per cycle) improvements for desktop environments.
It remains to be seen how these Zen 6c results—optimized for core density—will translate to standard Zen 6 desktop CPUs. Real-world gaming performance will require independent testing on consumer-grade hardware.
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