AMD Zen 4 vs. Zen 4C Performance, Zen 4C Core Scaling With Ryzen 5 8500G

Written by Michael Larabel in Processors on 28 February 2024 at 02:22 PM EST. Page 5 of 5. 21 Comments.
Llama.cpp benchmark with settings of Model: llama-2-7b.Q4_0.gguf. 2 x Zen 4, 4 x Zen 4C was the fastest.
Llama.cpp benchmark with settings of Model: llama-2-7b.Q4_0.gguf. 2 x Zen 4, 4 x Zen 4C was the fastest.
Llama.cpp benchmark with settings of Model: llama-2-7b.Q4_0.gguf. 2 x Zen 4, 4 x Zen 4C was the fastest.
Llama.cpp benchmark with settings of Model: llama-2-13b.Q4_0.gguf. 2 x Zen 4, 4 x Zen 4C was the fastest.
Llama.cpp benchmark with settings of Model: llama-2-13b.Q4_0.gguf. 2 x Zen 4, 4 x Zen 4C was the fastest.
Llama.cpp benchmark with settings of Model: llama-2-13b.Q4_0.gguf. 2 x Zen 4, 4 x Zen 4C was the fastest.

It would be very interesting if AMD were to release a low-power APU featuring all Zen 4C cores as it could be quite interesting for SOHO servers, inference at the edge, etc.

Geometric Mean Of All Test Results benchmark with settings of Result Composite, AMD Zen 4 Zen 4C Core Scaling Benchmarks. 2 x Zen 4, 4 x Zen 4C was the fastest.

When taking the geometric mean of all the performance benchmarks carried out, the combination of one Zen 4 and one Zen 4C core was around 84% the speed of two Zen 4 cores -- not bad at all for the Zen 4C showing especially with it topping out at 3.7GHz rather than 5.0GHz.

CPU Power Consumption Monitor benchmark with settings of Phoronix Test Suite System Monitoring.

Here is a look at the CPU power consumption over the entire duration of the benchmarking. Enabling each additional Zen 4C core of the Ryzen 5 8500G was increasing the power consumption 2~3 Watts on average.

CPU Temperature Monitor benchmark with settings of Phoronix Test Suite System Monitoring.

Lastly for reference purposes is the CPU thermals for all tested core configurations of the Ryzen 5 8500G.

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Michael Larabel

Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.