AMD Ryzen 9 7900 vs Ryzen 9 7900X CPU Review

Synthetic System Benchmarks – Ryzen 9 7900

We are going to start with synthetic system application benchmarks on this page. Note that the graphs are arranged from fastest to slowest. We have also highlighted the Ryzen 9 7900 and Ryzen 9 7900 with PBO ENABLED to give you a better visual comparison to the Ryzen 9 7900X. The label “PBO ENABLED” indicates the Ryzen 9 7900 with PBO ENABLED in the BIOS.

PCMark 10

PCMark 10 Express

AMD Ryzen 9 7900 PCMark 10 Benchmark

Our goal today is to find out the difference in performance between the Ryzen 9 7900 and Ryzen 9 7900X. In addition, we want to see how turning on PBO affects performance and if the Ryzen 9 7900 can come close to Ryzen 9 7900X performance with the automatic overclocking.

Starting off in PCMark 10’s Express system benchmark, we find the Ryzen 9 7900 is 5% under the benchmark score of the Ryzen 9 7900X. This overall system benchmark tests common office environment workloads in office applications. This indicates that in light office environment workloads, the Ryzen 9 7900 is about 5% slower than the Ryzen 9 7900X for these types of workloads. Turning on PBO gives the Ryzen 9 7900 a 1% increase in performance, but ultimately it is still farther away from Ryzen 9 7900X performance in these lightly threaded workloads.

Geekbench 6

AMD Ryzen 9 7900 Geekbench 6 Benchmark

In Geekbench 6 Multi-Core performance, the Ryzen 9 7900 is 8% slower than the Ryzen 9 7900X in multi-core performance. Enabling PBO adds a lot of performance here, and we see a performance increase by 5% and comes a lot closer to Ryzen 9 7900X performance. With PBO enabled the 7900 is only 3% slower than the 7900X now.

AMD Ryzen 9 7900 Geekbench 6 Benchmark

In Geekbench 6’s single-thread performance, we find the Ryzen 9 7900 to be 3% slower than the Ryzen 9 7900X. Enabling PBO doesn’t seem to affect performance in this benchmark’s single-thread performance.

3DMark CPU Profile

AMD Ryzen 9 7900 3DMark Benchmark

In 3DMark’s CPU Profile test, we are running the “Max Threads” test and looking at overall performance. This benchmark really shows the difference between the CPUs in maximum thread performance. The Ryzen 9 7900 is 19% slower than the Ryzen 9 7900X. This is a pretty big difference and shows that when all threads are pegged, there is a big difference between clock speed and TDP that adds up. Thankfully, enabling PBO makes up for some of that by adding 19% performance back! Now, with PBO enabled, the Ryzen 9 7900 is only 3% slower! PBO really helps here with all-core load.

AMD Ryzen 9 7900 3DMark Benchmark

When it comes to single-thread performance though, we find the Ryzen 9 7900 only 3% behind the Ryzen 9 7900X. Adding PBO doesn’t help much here. This is backed up by the lightly threaded PCMark 10’s results as well.

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REVIEW OVERVIEW

Performance
9
Efficiency (Perf per Watt)
10
Features
10
Value
9

SUMMARY

We reviewed the AMD Ryzen 9 7900 CPU and compared it directly versus the Ryzen 9 7900X to find out the performance differences in synthetic benchmarks and gaming performance. The Ryzen 9 7900 performed well but was quite under the 7900X in multi-core performance, but made up in single-thread or lightly threaded workloads where performance differences were small. The efficiency is excellent as a 65W CPU, and the features are top-notch. For the money, the CPU offers a lot of value and can be pushed higher with PBO, and a little tweaking. It offers a lot of possibility and options.
Brent Justicehttps://www.thefpsreview.com
Former managing editor of GPUs at HardOCP for 18 years, Brent Justice has been reviewing computer components since the late 90s, educated in the art and method of the computer hardware review, he brings experience, knowledge, and hands-on testing with a gamer-oriented and hardware enthusiast perspective. You can follow him on Twitter - @Brent_Justice You can sub to his YouTube channel - Justice Gaming https://www.youtube.com/c/JusticeGamingChannel You can check out his computer builds on KIT - @BrentJustice https://kit.co/BrentJustice

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We reviewed the AMD Ryzen 9 7900 CPU and compared it directly versus the Ryzen 9 7900X to find out the performance differences in synthetic benchmarks and gaming performance. The Ryzen 9 7900 performed well but was quite under the 7900X in multi-core performance, but made up in single-thread or lightly threaded workloads where performance differences were small. The efficiency is excellent as a 65W CPU, and the features are top-notch. For the money, the CPU offers a lot of value and can be pushed higher with PBO, and a little tweaking. It offers a lot of possibility and options.AMD Ryzen 9 7900 vs Ryzen 9 7900X CPU Review