I’ve run a few benchmarks on the AMD Ryzen 9 7940HS forcing it to only use a single Zen 4 core, and repeating with its SMT counterpart.
I ran the crafty benchmark on a single Zen 4 Core with and without SMT.
$ taskset -c 0,8 phoronix-test-suite benchmark crafty # 1 Zen 4 Core with SMT
$ taskset -c 0 phoronix-test-suite benchmark crafty # 1 Zen 4 Core without SMT
The chart below needs some explanation. I’m comparing the AMD Ryzen 9 7940HS’s Zen 4 core (from the BOSGAME M4 Plus), to an AMD Ryzen AI 9 HX 370 core (repeating for Zen 5 and Zen 5c), and an Intel Core Ultra 7 Processor 255H with its P-Core, E-Core, and Low Power E-Core. The Ultra 7 doesn’t have hyperthreading.
The crafty program only uses a single core. As the chart shows, SMT offers negligible improvement.
The single core performance between the three processors is about the same, even though the BOSGAME’s processor is an older generation.
A single AMD Ryzen 9 7940HS Zen 4 core is significantly faster than one of the Intel’s Ultra 7 255H’s E-Cores, as well as the Zen 5c core found in the AMD Ryzen AI 9 HX 370. The Intel LP E-Core’s performance is mediocre.
This is a useful chart considering that so many programs don’t make efficient use of multiple cores.
Let’s look at the smallpt benchmark. Unlike crafty, smallpt uses all cores. But I’ll still restrict the benchmark to a single core for each processor.
$ taskset -c 0,8 phoronix-test-suite benchmark smallpt # 1 Zen 4 Core with SMT
$ taskset -c 0 phoronix-test-suite benchmark smallpt # 1 Zen 4 Core without SMT
Here are the results for the Coremark benchmark.
$ taskset -c 0,8 phoronix-test-suite benchmark coremark # 1 Zen 4 Core with SMT
$ taskset -c 0 phoronix-test-suite benchmark coremark # 1 Zen 4 Core without SMT
The Zen 4 core (with SMT) performs significantly better than the Ultra 7’s P-Core.
Pages in this article:
Page 1 – Interpret output from top / Processor
Page 2 – Comparing Zen 4 to Zen 5 and Zen 5c and Core Ultra 7 P-Core, E-Core and LP E-Core
Complete list of articles in this series:
| BOSGAME M4 Plus Mini PC | |
|---|---|
| Introduction | Introduction to the series and interrogation of the machine |
| Benchmarks | Benchmarking the BOSGAME M4 Plus |
| Power | Testing and comparing the power consumption |
| Cores | AMD Ryzen 9 7940HS |