AMD EPYC 9634 vs Intel Xeon 6780E Comparison

The Intel Xeon 6780E and AMD EPYC 9634 are both flagship server processors, yet they approach parallel performance from fundamentally different angles. The data shows a clear split: AMD dominates in raw compute and single-threaded workloads, while Intel counters with decisive victories in encryption, compression, and floating-point math. Across 16 head-to-head benchmarks, the EPYC 9634 takes 12 wins, but the Xeon 6780E’s four wins are substantial enough to define specific use cases.

Head-to-Head Benchmarks

The most striking pattern is the consistency of AMD’s Cinebench sweep. The EPYC 9634 leads by exactly -19.6% (meaning Intel is 19.6% behind) in Cinebench R15 multi-core (9248 vs 7431), R20 multi-core (38535 vs 30963), and R23 multi-core (91752 vs 73723). Single-core results are equally lopsided: Cinebench R15 single-core shows 1305 vs 1049 (-19.6%), R20 single-core shows 5440 vs 4371 (-19.7%), and R23 single-core shows 12953 vs 4371 for Intel—wait, the data lists Intel’s R23 single-core as 4371? No, that is the R20 value. The R23 single-core for Intel is not in the head-to-head table, so we rely on what is provided. The PassMark single-thread test shows a massive 2924 vs 1923, a 34.2% deficit for Intel. That is the largest single-core gap in the entire comparison.

Beyond Cinebench, AMD continues its dominance in integer-heavy work. PassMark integer math goes to the EPYC 9634 at 725356 vs 641817, an 11.5% lead. PassMark physics favors AMD at 12291 vs 10951 (-10.9%). The find-prime-numbers test is a rout: 1176 vs 708, giving AMD a 39.8% advantage—the widest margin of any benchmark. PassMark multithread also goes AMD’s way at 107944 vs 86734 (-19.6%), reinforcing the Cinebench pattern. Extended instructions see AMD ahead at 137543 vs 114008 (-17.1%).

Intel’s wins are narrower but strategically important. PassMark data compression goes to the Xeon 6780E at 2557582 vs 2236412, a 14.4% advantage. Data encryption is Intel’s best result: 193004 vs 151943, a 27% lead. Floating-point math favors Intel at 433862 vs 353784, a 22.6% margin. Random string sorting is Intel’s fourth win at 326954 vs 261134, a 25.2% edge. Intel’s average benchmark score is 280438, while AMD’s is 244274—but that average is skewed by the large compression and encryption numbers. The head-to-head wins are 12 for AMD, 4 for Intel.

Architecture Differences

The two chips are built on the same 5 nm process node, but that is where the similarity ends. Intel’s Xeon 6780E uses the Sierra Forest architecture, a 144-core design with 144 threads (no hyperthreading). Each core has 96 KB of L1 cache, and L2 is organized as 4 MB per module. The shared L3 cache is 108 MB. The die size is 578 mm², fabricated by Intel itself. The EPYC 9634 uses AMD’s Zen 4 architecture (codenamed Genoa), with 84 cores and 168 threads—meaning each core supports two threads. L1 cache is 64 KB per core, L2 is 1 MB per core, and L3 is a massive 384 MB shared. AMD’s design uses 12 separate 72 mm² chiplets, with a total of 78,840 million transistors, fabricated by TSMC.

Clock speeds tell a similar story. The EPYC 9634 has a base clock of 2.25 GHz and a boost clock of 3.70 GHz. The Xeon 6780E sits lower at 2.20 GHz base and 3.00 GHz boost. This explains the single-thread deficit. TDP also differs: Intel draws 330 W, while AMD is rated at 290 W. Memory channels favor AMD: twelve-channel DDR5 with 460.8 GB/s bandwidth, versus Intel’s eight-channel DDR5 at 409.6 GB/s. PCIe lanes also favor AMD at 128 Gen 5 lanes, versus Intel’s 88 Gen 5 lanes. Both support ECC memory. The EPYC 9634 launched on November 9, 2022, while the Xeon 6780E arrived June 2, 2024.

The architecture choices are clear: Intel bets on massive core counts with simple single-threaded cores, while AMD uses fewer cores but with simultaneous multithreading and a much larger L3 cache. The 384 MB L3 vs 108 MB L3 is a 3.5x difference. The transistor count difference (78,840 million vs unspecified for Intel) and the chiplet vs monolithic design are fundamental. Intel’s 144 cores are all on one 578 mm² die; AMD spreads 84 cores across 12 smaller chiplets.

The Verdict

The data points to two different buyers. The AMD EPYC 9634 is the pick for general-purpose compute, database workloads, and anything that benefits from high single-thread performance and strong multi-thread scaling. It wins all Cinebench versions by nearly 20%, dominates prime-number finding by 39.8%, and leads integer math by 11.5%. Its 168 threads versus 144 give it a scheduling advantage in heavily threaded applications. The 3.70 GHz boost clock is 23% higher than Intel’s 3.00 GHz, which explains the 34.2% single-thread lead.

The Intel Xeon 6780E is the specialist. If your workload is data compression, encryption, or floating-point math, Intel is the answer. The 27% encryption lead and 25.2% string-sorting win suggest the Sierra Forest cores have dedicated acceleration for these tasks. The 22.6% floating-point advantage is notable because it comes despite AMD’s higher clocks—Intel’s architecture is simply better at this specific math. For a server that spends its life encrypting traffic or compressing data, the Xeon 6780E’s 144 cores deliver more throughput.

Neither chip is a general-purpose winner. The EPYC 9634’s average benchmark score of 244274 sits below Intel’s 280438, but that average is dragged down by Intel’s huge encryption and compression numbers. The nearest-rival data shows the Xeon 6780E is 2% behind the Intel Xeon 696X and 2.3% behind the EPYC 9555P, while the EPYC 9634 is 2.5% ahead of the Xeon 6747P but 8.5% behind the EPYC 9684X. The EPYC 9634 is the better all-rounder; the Xeon 6780E is the better accelerator for specific math.

Specification Differences

| Field | Intel Xeon 6780E | AMD EPYC 9634 |

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

| Cores | 144 | 84 |

| Threads | 144 | 168 |

| Base Clock | 2.20 GHz | 2.25 GHz |

| Boost Clock | 3.00 GHz | 3.70 GHz |

| TDP | 330 W | 290 W |

| Socket | Intel Socket 4710 | AMD Socket SP5 |

| Architecture | Sierra Forest | Zen 4 (Genoa) |

| Foundry | Intel | TSMC |

| Die Size | 578 mm² | 12x 72 mm² |

| Transistors | Not listed | 78,840 million |

| L1 Cache | 96 KB (per core) | 64 KB (per core) |

| L2 Cache | 4 MB (per module) | 1 MB (per core) |

| L3 Cache | 108 MB (shared) | 384 MB (shared) |

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

| Memory Bandwidth | 409.6 GB/s | 460.8 GB/s |

| PCIe | Gen 5, 88 lanes | Gen 5, 128 lanes |

| Release Date | 2024-06-02 | 2022-11-09 |

| Launch MSRP | $11350 | $10304 |

FAQ

Q: Which processor has more cores?

A: The Intel Xeon 6780E has 144 cores, while the AMD EPYC 9634 has 84 cores. However, the EPYC 9634 supports 168 threads compared to Intel’s 144 threads, because AMD uses simultaneous multithreading.

Q: Why does the AMD EPYC 9634 win most benchmarks despite fewer cores?

A: The EPYC 9634 has a higher boost clock (3.70 GHz vs 3.00 GHz) and a much larger L3 cache (384 MB vs 108 MB). These factors contribute to its 34.2% lead in PassMark single-thread and its 19.6% lead in Cinebench R23 multi-core.

Q: In which workloads does the Intel Xeon 6780E outperform the EPYC 9634?

A: Intel wins in four areas: data compression (14.4% lead), data encryption (27% lead), floating-point math (22.6% lead), and random string sorting (25.2% lead). These are specialized workloads where Intel’s architecture is more efficient.

Q: What is the memory bandwidth difference?

A: The AMD EPYC 9634 provides 460.8 GB/s over twelve DDR5 channels, while the Intel Xeon 6780E provides 409.6 GB/s over eight channels. AMD also offers more PCIe lanes: 128 Gen 5 lanes versus Intel’s 88.

Q: How do the two chips compare in terms of power draw?

A: The Intel Xeon 6780E has a TDP of 330 W, while the AMD EPYC 9634 is rated at 290 W. The 40 W difference is modest given Intel’s 60 additional cores.

Q: Which chip has better single-threaded performance?

A: The AMD EPYC 9634 is decisively ahead. PassMark single-thread shows 2924 vs 1923, a 34.2% margin. Cinebench R15 single-core shows 1305 vs 1049, a 19.6% gap. The EPYC’s 3.70 GHz boost clock is the primary driver.