AMD EPYC 7443 vs AMD Ryzen 3 7320C Comparison

The AMD Ryzen 3 7320C and the AMD EPYC 7443 occupy opposite ends of the processor spectrum, yet both are active products in the database. The Ryzen 3 7320C is a 4-core, 8-thread mobile part built for efficiency, while the EPYC 7443 is a 24-core, 48-thread server powerhouse. The benchmark data reveals a complete dominance by the EPYC 7443 in every recorded test, but the nature of that dominance and the architectural context behind it tell a more nuanced story than a simple list of scores.

Head-to-Head Benchmarks

The head-to-head comparison is entirely one-sided. Across all six Cinebench tests, the AMD EPYC 7443 wins every contest, and the deltas are remarkably consistent. In Cinebench R15 multi-core, the EPYC 7443 scores 4856 against the Ryzen 3 7320C's 708, a difference of 85.4%. The single-core test in R15 shows the same margin: 685 versus 99, again an 85.5% gap.

This pattern continues without exception. In Cinebench R20, the EPYC 7443 posts 20236 in multi-core versus 2950 for the Ryzen, and 2856 versus 416 in single-core. Both deltas are 85.4%. The R23 results follow suit: 48183 versus 7025 in multi-core, and 6802 versus 991 in single-core, with the same 85.4% delta. The consistency of this margin across every iteration is striking. It suggests that the performance gap is not workload-dependent but rather a fundamental scaling difference between the two processors.

The absolute scores put the difference in perspective. The EPYC 7443's multi-core R23 score of 48183 is nearly seven times the Ryzen 3 7320C's 7025. Even in single-core, where the Ryzen's 4.10 GHz boost clock might be expected to narrow the gap, the EPYC 7443's 6802 score dwarfs the 991 of the Ryzen. The Ryzen 3 7320C does not win a single benchmark in this comparison, recording zero wins out of six tests.

Where Each One Wins

Based on the recorded data, the AMD EPYC 7443 wins in every measured category. There is no benchmark in the comparison where the Ryzen 3 7320C comes out ahead. For the EPYC 7443, the wins span both multi-core and single-core workloads, indicating that its advantage is not limited to thread-heavy tasks. The server part is simply faster in every Cinebench iteration.

For the Ryzen 3 7320C, the absence of wins does not mean the processor lacks purpose, but the data shows no performance scenario where it outperforms the EPYC 7443. Its role is defined by other characteristics in the database, such as its 15 W TDP and integrated graphics, not by benchmark victories over this particular rival. The Ryzen 3 7320C is positioned for mobile efficiency, and the EPYC 7443 is positioned for server throughput. The benchmark results confirm that these are not competing products in the same segment.

Architecture Differences

The architectural gap between these two processors is substantial. The Ryzen 3 7320C is built on the Zen 2 architecture, codenamed Mendocino, using a 6 nm process from TSMC. The EPYC 7443 is a Zen 3 part, codenamed Milan, on a 7 nm process from the same foundry. The core counts differ massively: 4 cores and 8 threads for the Ryzen versus 24 cores and 48 threads for the EPYC.

Cache hierarchies reflect the different design goals. Both processors have 64 KB of L1 and 512 KB of L2 per core. The shared L3 cache, however, is a differentiating factor. The Ryzen 3 7320C has a 4 MB shared L3 cache, while the EPYC 7443 has a 128 MB shared L3 cache. That 32-fold difference in L3 capacity is a primary driver of the server part's performance in large datasets.

Memory support is another clear divide. The Ryzen 3 7320C supports LPDDR5 memory in a dual-channel configuration, providing 88.0 GB/s of bandwidth. The EPYC 7443 uses DDR4 with an eight-channel memory bus, reaching 204.8 GB/s. The EPYC also supports ECC memory, while the Ryzen does not. The Ryzen 3 7320C's TDP is 15 W, a figure typical for an ultra-mobile processor, while the EPYC 7443 draws 200 W, reflecting its server-class power envelope.

PCIe connectivity follows the same pattern. The Ryzen 3 7320C offers PCIe Gen 3 with 4 lanes, while the EPYC 7443 offers PCIe Gen 4 with 128 lanes. The Ryzen integrates a Radeon 610M GPU, whereas the EPYC 7443 has no integrated graphics. The die sizes also differ, with the Ryzen measuring 100 mm² and the EPYC using a multi-die design of 4x 81 mm². The EPYC's transistor count is listed at 16,600 million. The release dates are separated by roughly two years, with the Ryzen launching in May 2023 and the EPYC in March 2021.

FAQ

Q: Which processor has a higher boost clock?

A: The AMD Ryzen 3 7320C has a boost clock of 4.10 GHz, which is higher than the AMD EPYC 7443's 4.00 GHz. Despite this, the EPYC 7443 still performs significantly better in single-core benchmarks.

Q: How do the average benchmark scores compare?

A: The Ryzen 3 7320C has an average benchmark score of 14277, while the EPYC 7443 has an average score of 13936. This puts the Ryzen slightly ahead in the database's overall averaging metric, despite losing every head-to-head test.

Q: What is the difference in L3 cache size?

A: The AMD EPYC 7443 has a 128 MB shared L3 cache, while the AMD Ryzen 3 7320C has a 4 MB shared L3 cache. The EPYC's cache is 32 times larger.

Q: Does the Ryzen 3 7320C support ECC memory?

A: No, the Ryzen 3 7320C does not support ECC memory. The AMD EPYC 7443 supports ECC memory.

Q: What is the memory bandwidth of each processor?

A: The Ryzen 3 7320C has a memory bandwidth of 88.0 GB/s using dual-channel LPDDR5. The EPYC 7443 has a memory bandwidth of 204.8 GB/s using eight-channel DDR4.

Q: What are the process nodes for these CPUs?

A: The Ryzen 3 7320C is fabricated on a 6 nm process, while the EPYC 7443 is fabricated on a 7 nm process. Both are manufactured by TSMC.

The Verdict

The data dictates a clear verdict: the AMD EPYC 7443 is the superior processor in every benchmark recorded. It wins all six Cinebench tests, with an 85.4% advantage in nearly every category. For any workload measured, the EPYC 7443 delivers far higher performance. The Ryzen 3 7320C's higher boost clock of 4.10 GHz does not translate into a win in any test, even single-core.

However, the database also shows that these processors are not direct competitors. The Ryzen 3 7320C is a mobile processor with a 15 W TDP, integrated graphics, and LPDDR5 support, aimed at low-power devices. The EPYC 7443 is a server processor with a 200 W TDP, 128 MB of L3 cache, eight-channel DDR4, and PCIe Gen 4 with 128 lanes. The Ryzen 3 7320C's average benchmark score of 14277 is actually slightly higher than the EPYC 7443's 13936, and its percentile ranking of 69 versus 68 is marginally better. This indicates that in the broader context of all CPUs, the Ryzen 3 7320C is not a weak processor; it is simply outmatched when compared directly against the EPYC 7443.

The choice between these two is therefore a matter of platform and workload. If the requirement is high-core-count server processing, the EPYC 7443 is the only option with data to support it. If the requirement is a low-power mobile processor, the Ryzen 3 7320C is the relevant part, and its performance relative to the EPYC 7443 is not a meaningful metric. The EPYC 7443 is the benchmark winner, but the Ryzen 3 7320C serves a fundamentally different purpose.