AMD EPYC 7543 vs AMD EPYC 9334 Comparison

The AMD EPYC 9334 and AMD EPYC 7543 are both 32-core server processors, but they belong to different generations. The EPYC 9334 is part of the EPYC 9004 series based on Zen 4 (Genoa), while the EPYC 7543 is from the EPYC 7003 series based on Zen 3 (Milan). In the database's recorded Cinebench tests, the EPYC 9334 wins all six head-to-head matchups, each by a 3% margin. Its average benchmark score is 15940 against 15477 for the EPYC 7543, and it holds a 70th percentile rank versus 69th. The following sections break down the results and specifications.

Where Each One Wins

The head-to-head data shows a clean sweep for the EPYC 9334. It wins every recorded Cinebench test, both single-core and multi-core, with a consistent 3% delta. The EPYC 7543 does not win any of the six comparisons. However, the EPYC 7543 does have a higher base clock (2.80 GHz vs 2.70 GHz) and a larger L3 cache (256 MB vs 128 MB). These specifications could favor workloads that are sensitive to cache capacity or sustained base frequency, but the benchmark results do not reflect an advantage in the Cinebench suite. For users prioritizing the highest recorded scores, the EPYC 9334 is the clear choice. For workloads that might benefit from the larger L3 cache, the EPYC 7543 remains a viable option, though the data does not show a win in any tested scenario.

The overall ranking context reinforces this split. The EPYC 9334 sits at the 70th percentile of all CPUs in the database, while the EPYC 7543 is at the 69th. The EPYC 9334's average score of 15940 places it just ahead of the Intel Core Ultra 5 134U (15910, 0.2% delta) and the AMD Ryzen 5 40 (15882, 0.4% delta). The EPYC 7543's average of 15477 is 1.8% behind the AMD EPYC 9254 (15756) and 1.7% behind the Intel Core i5-11400H (15749). These nearest-rival comparisons show that the EPYC 9334 is competitive with a different tier of processors than the EPYC 7543, even though both are 32-core server parts.

FAQ

Q: Which processor has the higher single-core Cinebench R23 score?

A: The AMD EPYC 9334 scores 7780, while the AMD EPYC 7543 scores 7554, a 3% difference.

Q: Which processor supports DDR5 memory?

A: The AMD EPYC 9334 supports DDR5, while the AMD EPYC 7543 supports DDR4.

Q: What is the difference in L3 cache size?

A: The EPYC 7543 has 256 MB of shared L3 cache, while the EPYC 9334 has 128 MB.

Q: Which processor has a higher boost clock?

A: The EPYC 9334 has a boost clock of 3.90 GHz, compared to 3.70 GHz for the EPYC 7543.

Q: How do their average benchmark scores compare?

A: The EPYC 9334 has an average benchmark score of 15940, while the EPYC 7543 averages 15477.

Q: Which processor has a higher TDP rating?

A: The EPYC 7543 has a TDP of 225 W, while the EPYC 9334 has a TDP of 210 W.

Head-to-Head Benchmarks

The table below lists the six recorded Cinebench tests, with scores for both processors and the delta percentage.

| Test | EPYC 9334 | EPYC 7543 | Delta |

|------|-----------|-----------|-------|

| Cinebench R15 Multi-Core | 5555 | 5393 | 3% |

| Cinebench R15 Single-Core | 784 | 761 | 3% |

| Cinebench R20 Multi-Core | 23146 | 22473 | 3% |

| Cinebench R20 Single-Core | 3267 | 3172 | 3% |

| Cinebench R23 Multi-Core | 55110 | 53509 | 3% |

| Cinebench R23 Single-Core | 7780 | 7554 | 3% |

The delta is exactly 3% in every test. The largest absolute gap is in Cinebench R23 multi-core, where the EPYC 9334 leads by 1601 points (55110 vs 53509). The smallest absolute gap is in Cinebench R15 single-core, with a 23-point difference (784 vs 761). The consistency of the 3% delta across both single-threaded and multi-threaded workloads indicates a systematic performance lead for the EPYC 9334 in this benchmark suite. The EPYC 9334 also holds a higher average benchmark score (15940 vs 15477), which is a 3% difference as well, matching the per-test margins.

Specification Differences

The two processors differ in several key specifications. The table below summarizes the differences.

| Specification | EPYC 9334 | EPYC 7543 |

|---------------|-----------|-----------|

| Base Clock | 2.70 GHz | 2.80 GHz |

| Boost Clock | 3.90 GHz | 3.70 GHz |

| TDP | 210 W | 225 W |

| Socket | AMD Socket SP5 | AMD Socket SP3 |

| Architecture | Zen 4 | Zen 3 |

| Codename | Genoa | Milan |

| Process Node | 5 nm | 7 nm |

| Transistors | 52,560 million | 33,200 million |

| Die Size | 4x 72 mm² | 8x 81 mm² |

| L2 Cache | 1 MB per core | 512 KB per core |

| L3 Cache | 128 MB shared | 256 MB shared |

| Memory Support | DDR5 | DDR4 |

| Memory Bus | Twelve-channel | Eight-channel |

| Memory Bandwidth | 460.8 GB/s | 204.8 GB/s |

| PCIe | Gen 5, 128 Lanes | Gen 4, 128 Lanes |

| Release Date | 2022-11-09 | 2021-03-14 |

| Launch MSRP | $2990 | $3761 |

Both processors share 32 cores, 64 threads, ECC memory support, no integrated graphics, a server/workstation market segment, active production status, and a locked multiplier. The EPYC 9334 has a lower TDP (210 W vs 225 W) despite delivering higher benchmark scores, which is notable for power-constrained environments.

Architecture Differences

The EPYC 9334 is built on the Zen 4 architecture with the Genoa codename, while the EPYC 7543 uses Zen 3 with the Milan codename. The process node differs: 5 nm for the EPYC 9334 versus 7 nm for the EPYC 7543, both fabricated by TSMC. The transistor count is 52,560 million for the EPYC 9334 and 33,200 million for the EPYC 7543. The die layout also differs: the EPYC 9334 uses 4x 72 mm² chiplets, while the EPYC 7543 uses 8x 81 mm² chiplets.

The cache hierarchy changes significantly. The L2 cache per core is 1 MB on the EPYC 9334 versus 512 KB on the EPYC 7543. The L3 cache is 128 MB shared on the EPYC 9334 and 256 MB shared on the EPYC 7543. This means the EPYC 7543 has twice the L3 capacity, but the EPYC 9334 has a larger L2 per core.

Memory support moves from DDR4 with an eight-channel bus and 204.8 GB/s bandwidth on the EPYC 7543 to DDR5 with a twelve-channel bus and 460.8 GB/s bandwidth on the EPYC 9334. This is a substantial increase in theoretical memory bandwidth. PCIe generation advances from Gen 4 to Gen 5, with both offering 128 lanes. The socket changes from SP3 to SP5, which is a physical and electrical difference that affects platform compatibility.

Both processors support ECC memory and have no integrated graphics. Both are active production parts and are not multiplier unlocked. The architectural differences, particularly the newer process node, higher transistor count, and faster memory subsystem, align with the benchmark results showing the EPYC 9334 ahead in every recorded test.