AMD EPYC 9334 vs AMD EPYC 9354P Comparison

The AMD EPYC 9334 and AMD EPYC 9354P are both 32-core processors from the EPYC 9004 series, built on the Zen 4 (Genoa) architecture and sharing the AMD Socket SP5 platform. The benchmark data reveals a clear performance hierarchy between the two, with the 9354P consistently outperforming the 9334 across every measured workload. However, the margin of victory is uniform and the architectural differences are nuanced, making the choice between them a matter of specific workload priorities and power constraints rather than a simple performance sweep.

Head-to-Head Benchmarks

The head-to-head benchmark results are unambiguous: the AMD EPYC 9354P wins all six recorded comparisons against the EPYC 9334. The most striking aspect of these results is the consistency of the performance gap. Across Cinebench R15, R20, and R23, in both single-core and multi-core tests, the deltaPct is exactly -13.7% in favor of the 9354P. This uniformity suggests a fundamental clock-speed advantage rather than a workload-specific architectural benefit.

In Cinebench R23 multi-core, the 9354P scores 63840 against the 9334's 55110, a difference of 8730 points. In single-core R23, the 9354P posts 9012 versus 7780, a gap of 1232 points. The same proportional advantage appears in R20, where the 9354P reaches 26812 multi-core and 3785 single-core, compared to the 9334's 23146 and 3267 respectively. Cinebench R15 shows the 9354P at 6434 multi-core and 908 single-core, against the 9334's 5555 and 784.

The data shows no scenario where the EPYC 9334 closes the gap. The 13.7% deficit is uniform across all tested applications. When placed in the broader context of their average benchmark scores, the two processors are remarkably close: the 9334 has an average benchmark score of 15940, while the 9354P sits at 15826. The 9334's nearest rival list includes the 9354P with a deltaPct of 0.7%, meaning the 9334 holds a marginal 0.7% lead in average score over the 9354P despite losing every head-to-head test. This paradox arises because the 9334 has a higher percentile rank (70th versus 69th) and its average score is calculated from a different set of benchmarks than the head-to-head comparisons.

The 9354P's nearest rivals include the AMD EPYC 75F3 at 15859 (a -0.2% delta) and the AMD EPYC 9254 at 15756 (a 0.4% delta), placing it in a tight cluster of high-performance server chips. The 9334, meanwhile, sits just above the Intel Core Ultra 5 134U at 15910 (0.2% delta) and the AMD Ryzen 5 40 at 15882 (0.4% delta), indicating that its average score is competitive with a much broader range of processors.

Architecture Differences

Both processors share the same fundamental architecture: Zen 4 on a 5 nm TSMC process, with 52,560 million transistors and the Genoa codename. They are both 32-core, 64-thread parts with 64 KB of L1 cache per core and 1 MB of L2 cache per core. The memory subsystem is identical as well: DDR5 support with a twelve-channel memory bus and 460.8 GB/s of memory bandwidth, plus ECC memory support. Both use AMD Socket SP5 and offer Gen 5 PCIe with 128 lanes (CPU only).

The critical architectural divergence lies in the L3 cache and die configuration. The EPYC 9334 features 128 MB of shared L3 cache and a die size of 4x 72 mm². The EPYC 9354P doubles the L3 cache to 256 MB shared and uses a larger die configuration of 8x 72 mm². This doubling of L3 cache is a significant difference for server workloads that benefit from larger working sets residing in cache.

Clock speeds also differ substantially. The EPYC 9334 has a base clock of 2.70 GHz and a boost clock of 3.90 GHz. The EPYC 9354P has a higher base clock of 3.25 GHz and a boost clock of 3.80 GHz. The 9354P's higher base clock explains its consistent 13.7% lead in single-core benchmarks, while its slightly lower boost clock does not prevent it from winning multi-core tests. The 9334's lower base clock is a direct consequence of its lower thermal design power (TDP), which is 210 watts versus the 9354P's 280 watts.

The production status for both is Active, and both were released on the same date. The launch MSRP for the 9334 is $2990, while the 9354P has a launch MSRP of $2730. The 9354P offers more L3 cache and higher clock speeds at a lower launch MSRP, which the benchmark data reflects in its superior performance.

The Verdict

The benchmark results indicate a clear winner for raw performance: the AMD EPYC 9354P. It wins every single head-to-head benchmark by exactly 13.7%, and this margin holds across single-core and multi-core workloads. The 9354P's higher base clock of 3.25 GHz versus 2.70 GHz on the 9334 is the primary driver of this advantage. For any workload that is sensitive to clock speed, the 9354P is the superior choice.

However, the 9334 is not without its merits. Its lower TDP of 210 watts versus 280 watts makes it a more power-efficient option for densely packed server environments where thermal management is a constraint. The 9334 also has a higher percentile rank (70th) than the 9354P (69th), and its average benchmark score of 15940 is 0.7% higher than the 9354P's 15826. This indicates that in a broader benchmark suite beyond the six head-to-head tests, the 9334 may perform comparably or better.

The choice between these two processors depends on whether the uniform 13.7% performance advantage of the 9354P is worth the additional 70 watts of TDP. The data shows that the 9354P is the faster chip in every measured test, and its larger 256 MB L3 cache provides additional headroom for cache-sensitive workloads. The 9334, with its lower power draw and competitive average score, is better suited for scenarios where power density is the primary concern.

FAQ

Q: How much faster is the AMD EPYC 9354P than the EPYC 9334 in multi-core workloads?

A: The 9354P is 13.7% faster than the 9334 in all measured multi-core tests. In Cinebench R23 multi-core, the 9354P scores 63840 versus 55110 for the 9334; in R20, it scores 26812 versus 23146; and in R15, it scores 6434 versus 5555.

Q: What is the difference in L3 cache between the two processors?

A: The EPYC 9354P has 256 MB of shared L3 cache, while the EPYC 9334 has 128 MB of shared L3 cache. The 9354P doubles the L3 capacity available to the cores.

Q: Do both processors have the same core and thread counts?

A: Yes, both the EPYC 9334 and EPYC 9354P have 32 cores and 64 threads. They also share the same L1 cache (64 KB per core) and L2 cache (1 MB per core) configurations.

Q: Which processor has a higher base clock speed?

A: The EPYC 9354P has a base clock of 3.25 GHz, which is significantly higher than the EPYC 9334's base clock of 2.70 GHz. The 9334 has a slightly higher boost clock of 3.90 GHz versus the 9354P's 3.80 GHz.

Q: How do their average benchmark scores compare?

A: The EPYC 9334 has an average benchmark score of 15940, which is 0.7% higher than the EPYC 9354P's average score of 15826. This is despite the 9354P winning all six head-to-head comparisons.

Q: Are both processors based on the same architecture and manufacturing process?

A: Yes, both are Zen 4 (Genoa) architecture on a 5 nm TSMC process with 52,560 million transistors. They both use AMD Socket SP5 and support DDR5 memory with a twelve-channel bus.

Where Each One Wins

AMD EPYC 9354P — Performance-Critical Workloads: The 9354P is the unequivocal winner in every benchmark test recorded. Its 13.7% advantage in both single-core and multi-core Cinebench tests makes it the better choice for applications that are heavily dependent on raw compute throughput. The higher base clock of 3.25 GHz provides sustained performance under load, and the doubled 256 MB L3 cache offers a larger cache footprint for data-intensive server workloads. The 9354P also carries a lower launch MSRP of $2730 compared to the 9334's $2990, though pricing should not be the primary consideration given the performance differential.

AMD EPYC 9334 — Power-Constrained Deployments: The 9334's primary advantage is its lower TDP of 210 watts versus the 9354P's 280 watts. For server racks where power delivery and thermal dissipation are limiting factors, the 9334 allows for higher core density per watt. Its higher boost clock of 3.90 GHz, while marginally above the 9354P's 3.80 GHz, does not translate into a benchmark win. The 9334's average benchmark score of 15940 is 0.7% higher than the 9354P's 15826, suggesting that in workloads not covered by the head-to-head tests, the 9334 may hold a slight edge. Its higher percentile rank (70th versus 69th) also indicates marginally better standing across the full CPU database.

Cache-Sensitive Applications: The 9354P's 256 MB L3 cache versus the 9334's 128 MB makes it the better choice for workloads with large working sets that benefit from cache residency. This includes database workloads, virtualization hosts, and in-memory analytics where the additional 128 MB of L3 can reduce memory latency. The 9334, with its smaller cache, would rely more frequently on the twelve-channel DDR5 memory subsystem, which provides identical 460.8 GB/s bandwidth on both processors.

Single-Threaded Performance: The 9354P wins all three Cinebench single-core tests by 13.7%, scoring 908 in R15, 3785 in R20, and 9012 in R23. The 9334 scores 784, 3267, and 7780 respectively. For applications that are not well-parallelized, the 9354P's higher base clock provides a decisive advantage. The 9334's higher boost clock of 3.90 GHz versus 3.80 GHz does not help it win any single-core test, indicating that sustained boost behavior favors the 9354P.