AMD EPYC 7443P vs AMD Ryzen 9 8940HX Comparison

The AMD Ryzen 9 8940HX and AMD EPYC 7443P occupy opposite ends of the processor spectrum, yet their average benchmark scores sit within 0.8% of each other. This creates a fascinating comparison where architectural priorities, rather than raw performance ceilings, separate the two. The data shows a clear split: the EPYC 7443P dominates the majority of workloads, while the Ryzen 9 8940HX takes a decisive lead in specific single-threaded and instruction-heavy tests.

Head-to-Head Benchmarks

The EPYC 7443P wins 14 of the 17 direct benchmark comparisons, but the margin of victory varies dramatically by workload. In Cinebench tests, the EPYC holds a consistent 6.1% advantage across all six runs. Its R23 multi-core score of 48433 surpasses the Ryzen 9's 45488, while its R23 single-core score of 6837 beats the Ryzen 9's 6421 by the same 6.1% margin. This uniformity suggests a fundamental throughput advantage rather than workload-specific optimization.

The PassMark suite reveals where the EPYC's additional cores and server-class memory subsystem pay off most. The largest single win comes in the physics test, where the EPYC scores 4748 against the Ryzen 9's 2115 — a 55.5% gap. This is the biggest delta in the entire comparison and highlights the EPYC's advantage in simulation-style floating-point workloads. The data encryption test shows a 22.4% lead for the EPYC (57263 vs 44430), while find prime numbers yields a 33.7% advantage (410 vs 272). Integer math favors the EPYC by 11.5% (232632 vs 205945), and data compression by 10% (820859 vs 738673). Random string sorting adds another 10.2% EPYC advantage (95581 vs 85869).

The Ryzen 9 8940HX claims only 3 wins, but they are decisive in their categories. The PassMark single-thread test shows a 38.7% lead for the Ryzen 9 with a score of 4033 versus the EPYC's 2907 — a massive gap that underscores the mobile chip's clock speed advantage. The extended instructions test is the other notable Ryzen 9 victory, scoring 54674 against the EPYC's 48213, a 13.4% margin. This indicates the Zen 4 architecture's newer instruction set implementation outperforms the older Zen 3 design despite the EPYC's core count advantage.

Where Each One Wins

The EPYC 7443P is the clear choice for heavily parallelized, server-oriented workloads. Its physics test dominance (55.5% ahead) points to scientific computing and simulation tasks. The 22.4% encryption advantage and 33.7% prime number finding lead suggest workloads involving cryptography, hashing, and number theory will see substantial benefits. The 11.5% integer math and 10% data compression leads make it well-suited for database operations, file compression, and general server-side processing. The consistent 6.1% Cinebench multi-core margin across all three versions reinforces its strength in rendering and content creation tasks that scale with core count.

The Ryzen 9 8940HX wins in scenarios requiring maximum single-thread responsiveness. Its 38.7% PassMark single-thread advantage matters for applications that cannot parallelize efficiently — legacy software, certain scripting languages, and interactive workloads. The 13.4% extended instructions lead indicates it handles AVX-512 and other modern instruction sets more effectively, which benefits specific scientific and media-processing applications. Its floating-point math score of 125981 trails the EPYC's 129932 by only 3%, showing that despite the core deficit, the Zen 4 architecture nearly matches the EPYC in this metric.

Architecture Differences

The two processors represent distinct generations of AMD design. The Ryzen 9 8940HX uses Zen 4 architecture on a 5 nm process from TSMC, while the EPYC 7443P relies on Zen 3 on a 7 nm node. The Ryzen 9, codenamed Dragon Range, is built for mobile platforms with a 55W TDP, whereas the EPYC, codenamed Milan, targets servers with a 200W TDP. This power envelope difference directly influences their performance characteristics.

Core counts diverge significantly: the EPYC packs 24 cores and 48 threads, while the Ryzen 9 offers 16 cores and 32 threads. Cache hierarchies also differ substantially. Both share 64 KB of L1 per core, but the Ryzen 9 provides 1 MB of L2 per core versus the EPYC's 512 KB. The L3 cache is where the EPYC pulls ahead dramatically with 128 MB shared versus the Ryzen 9's 64 MB. The EPYC also uses a more complex physical layout with 4x 81 mm² dies containing 16,600 million transistors, while the Ryzen 9 uses 2x 71 mm² dies with 13,140 million transistors.

Memory architecture represents a fundamental divide. The Ryzen 9 supports dual-channel DDR5 with 83.2 GB/s bandwidth and no ECC capability. The EPYC supports eight-channel DDR4 with 204.8 GB/s bandwidth and full ECC support — a 2.5x memory bandwidth advantage. PCIe connectivity also differs: the Ryzen 9 offers 28 Gen 5 lanes, while the EPYC provides 128 Gen 4 lanes, trading per-lane bandwidth for massive lane count.

Specification Differences

The most striking specification gap is clock speed. The Ryzen 9 boosts to 5.30 GHz from a 2.40 GHz base, while the EPYC boosts to only 4.00 GHz from a 2.85 GHz base. This explains the Ryzen 9's single-thread dominance despite the EPYC's higher base clock. The TDP difference is equally stark: 55W for the Ryzen 9 versus 200W for the EPYC — a 3.6x power envelope disparity that accounts for the performance differences in sustained workloads.

The EPYC's launch MSRP is $1337, while the Ryzen 9 has no listed launch MSRP. The EPYC uses AMD Socket SP3, locked multiplier, and targets the Server/Workstation segment. The Ryzen 9 uses AMD Socket FL1, has an unlocked multiplier, and targets Mobile. The Ryzen 9 includes integrated Radeon 610M graphics; the EPYC has no integrated graphics. Memory support differs: DDR5 for the Ryzen 9, DDR4 for the EPYC. ECC memory is supported on the EPYC but not the Ryzen 9. The EPYC's part number is 100-000000342100-100000342WOF, while the Ryzen 9 uses 100-000001849. Both processors remain in active production.

FAQ

Q: Which processor has the higher average benchmark score?

A: The Ryzen 9 8940HX has a slightly higher average benchmark score of 82332 compared to the EPYC 7443P's 81661, a 0.8% difference.

Q: How do the Cinebench R23 scores compare?

A: The EPYC 7443P leads in both multi-core and single-core R23 tests. It scores 48433 multi-core versus the Ryzen 9's 45488, and 6837 single-core versus 6421, a 6.1% advantage in both cases.

Q: What is the biggest performance gap between the two?

A: The PassMark physics test shows the largest difference, with the EPYC 7443P scoring 4748 compared to the Ryzen 9's 2115, a 55.5% advantage for the EPYC.

Q: Does the Ryzen 9 8940HX win any benchmarks?

A: Yes, it wins three tests: PassMark single-thread (4033 vs 2907, a 38.7% lead), PassMark single-thread duplicate (same scores), and PassMark extended instructions (54674 vs 48213, a 13.4% lead).

Q: How do their memory systems differ?

A: The EPYC 7443P uses eight-channel DDR4 with 204.8 GB/s bandwidth and ECC support, while the Ryzen 9 8940HX uses dual-channel DDR5 with 83.2 GB/s bandwidth and no ECC.

Q: Are both processors still in production?

A: Yes, both the AMD Ryzen 9 8940HX and AMD EPYC 7443P have an Active production status, though the EPYC was released in March 2021 while the Ryzen 9 came in April 2025.

The Verdict

The data presents a clear picture for different use cases. The AMD EPYC 7443P is the superior choice for server and workstation environments where multi-threaded throughput, memory bandwidth, and ECC reliability are paramount. Its 24 cores, 128 MB L3 cache, and 204.8 GB/s eight-channel memory bandwidth deliver decisive wins in physics simulation (55.5% ahead), encryption (22.4% ahead), and prime number finding (33.7% ahead). The consistent 6.1% Cinebench advantage across all tests confirms its strength in rendering and content creation. Its 200W TDP and server socket reflect a design built for sustained, heavy workloads.

The AMD Ryzen 9 8940HX is the better pick for mobile platforms requiring maximum single-thread performance and modern instruction set support. Its 38.7% PassMark single-thread lead and 13.4% extended instructions advantage make it ideal for interactive applications, legacy software, and workloads leveraging newer CPU instructions. The 5.30 GHz boost clock, unlocked multiplier, and 55W TDP position it for high-performance laptops and compact systems where power efficiency and responsiveness matter more than raw core count.

For users choosing between these two, the decision hinges on workload type. The EPYC 7443P dominates 14 of 17 benchmarks, making it the default choice for computational density. The Ryzen 9 8940HX wins only 3 tests, but those wins are in categories that matter for single-threaded responsiveness and modern instruction efficiency. Both sit in the 97th percentile of all CPUs, yet they achieve this status through entirely different architectural philosophies. The EPYC leverages core count and memory bandwidth; the Ryzen 9 leverages clock speed and architectural efficiency. Neither is universally better — the data shows a tradeoff between throughput-oriented server design and latency-oriented mobile design, with each excelling in its intended domain.