AMD EPYC 9135 vs Intel Xeon w5-2565X Comparison

FAQ

Q: Which processor has more physical cores?

A: The Intel Xeon w5-2565X has 18 cores and 36 threads, while the AMD EPYC 9135 has 16 cores and 32 threads. Despite the core deficit, the EPYC wins 15 of 17 head-to-head benchmarks.

Q: What is the biggest single-benchmark margin between the two?

A: In PassMark physics, the AMD EPYC 9135 scores 5477 versus 2622 for the Intel Xeon w5-2565X, a 108.9% advantage. This is the largest deltaPct in the entire comparison.

Q: How do the average benchmark scores compare?

A: The AMD EPYC 9135 has an average benchmark score of 82980, placing it in the 96th percentile of all CPUs. The Intel Xeon w5-2565X averages 80671, in the 95th percentile. The EPYC's nearest rival is the AMD EPYC 4584PX (deltaPct -0.1), while the Xeon's nearest rival is the Intel Xeon 638 (deltaPct -0.1).

Q: Which CPU has higher boost clock and what is the difference?

A: The Intel Xeon w5-2565X boosts to 4.80 GHz, while the AMD EPYC 9135 boosts to 4.30 GHz. However, the EPYC has a higher base clock at 3.65 GHz versus 3.20 GHz for the Xeon.

Q: Are both processors unlocked for overclocking?

A: No. The Intel Xeon w5-2565X has an unlocked multiplier, while the AMD EPYC 9135 is locked. This gives the Intel part flexibility for manual tuning that AMD does not offer.

Q: What is the memory bandwidth difference?

A: The AMD EPYC 9135 supports twelve-channel DDR5 with 576.0 GB/s bandwidth. The Intel Xeon w5-2565X supports quad-channel DDR5 with 153.6 GB/s. The EPYC provides 3.75 times the theoretical memory bandwidth.

Where Each One Wins

The AMD EPYC 9135 dominates the benchmark suite, claiming 15 of 17 head-to-head victories. Its wins span Cinebench R15, R20, and R23 in both single-core and multi-core tests, with consistent 11.4-11.5% margins across all six Cinebench entries. The EPYC also takes PassMark multithread (57170 vs 51897, +10.2%), integer math (202962 vs 189446, +7.1%), data compression (739277 vs 726133, +1.8%), data encryption (40295 vs 36365, +10.8%), random string sorting (90064 vs 74360, +21.1%), find prime numbers (292 vs 218, +33.9%), single-thread (3672 vs 3595, +2.1%), and physics (5477 vs 2622, +108.9%).

The Intel Xeon w5-2565X wins exactly two benchmarks. It leads in PassMark extended instructions (58976 vs 55822, +5.3%) and floating-point math (147644 vs 126679, +14.2%). These are meaningful victories for workloads that rely on SIMD-style operations and heavy FPU utilization. The Xeon's floating-point advantage is particularly notable given that the EPYC wins integer math by 7.1% — each chip leads in a distinct math domain.

For single-threaded responsiveness, the EPYC's 2.1% edge in PassMark single-thread and 11.5% edge in Cinebench R15 single-core makes it the better choice for lightly threaded tasks. The Xeon's higher boost clock (4.80 GHz vs 4.30 GHz) does not translate into a single-thread win in any test.

Architecture Differences

The AMD EPYC 9135 uses Zen 5 architecture on a 4 nm TSMC process, codenamed Turin, part of the EPYC 9005 series. It packs 16,630 million transistors across a dual-die design with each die measuring 70.6 mm². The Intel Xeon w5-2565X uses Sapphire Rapids architecture on Intel's 10 nm process, with no transistor count or die size disclosed. The process node difference is substantial: 4 nm versus 10 nm, giving AMD a significant density and efficiency advantage.

Cache configurations differ sharply. Both have 80 KB L1 per core, but the EPYC has 1 MB L2 per core versus 2 MB per core on the Xeon. The EPYC compensates with a large 64 MB shared L3, while the Xeon has 37.5 MB L3 total. The EPYC's 64 MB L3 is 71% larger than the Xeon's 37.5 MB, which likely contributes to its strong performance in data compression and random string sorting.

Memory infrastructure is another major divergence. The EPYC uses a twelve-channel memory bus delivering 576.0 GB/s, while the Xeon uses quad-channel at 153.6 GB/s. Both support DDR5 and ECC memory. PCIe connectivity also differs: the EPYC offers 128 Gen 5 lanes (CPU only) versus 64 Gen 5 lanes on the Xeon — a 2:1 advantage for AMD.

The Xeon w5-2565X has an unlocked multiplier, making it a workstation-focused overclockable part. The EPYC 9135 is locked, reflecting its server-grade positioning. Both lack integrated graphics, so a discrete GPU is required.

Specification Differences

| Specification | AMD EPYC 9135 | Intel Xeon w5-2565X |

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

| Cores | 16 | 18 |

| Threads | 32 | 36 |

| Base Clock | 3.65 GHz | 3.20 GHz |

| Boost Clock | 4.30 GHz | 4.80 GHz |

| TDP | 200 W | 240 W |

| Socket | AMD Socket SP5 | Intel Socket 4677 |

| Process Node | 4 nm | 10 nm |

| L2 Cache | 1 MB per core | 2 MB per core |

| L3 Cache | 64 MB shared | 37.5 MB |

| Memory Bus | Twelve-channel | Quad-channel |

| Memory Bandwidth | 576.0 GB/s | 153.6 GB/s |

| PCIe Lanes | 128 (Gen 5) | 64 (Gen 5) |

| Multiplier | Locked | Unlocked |

| Launch MSRP | $1214 | $1339 |

| Release Date | 2024-10-09 | 2024-08-23 |

The Xeon has 2 more cores, 4 more threads, a 0.50 GHz higher boost clock, 1 MB more L2 per core, and an unlocked multiplier. The EPYC has a 0.45 GHz higher base clock, lower TDP (200 W vs 240 W), 26.5 MB more L3, twelve-channel memory, double the PCIe lanes, and a 4 nm process versus 10 nm.

Head-to-Head Benchmarks

Cinebench results are uniformly in favor of the AMD EPYC 9135. In R15 multi-core, the EPYC scores 4952 against 4446 for the Xeon, an 11.4% margin. R15 single-core shows 699 vs 627, an 11.5% edge. R20 multi-core yields 20637 vs 18527 (+11.4%), and R20 single-core 2913 vs 2615 (+11.4%). R23 multi-core gives 49136 vs 44112 (+11.4%), with R23 single-core at 6936 vs 6227 (+11.4%). The consistency is striking — every Cinebench test produces nearly the identical 11.4% delta, suggesting a systematic advantage in the EPYC's rendering throughput.

PassMark results show a more varied picture. The EPYC wins multithread by 10.2% (57170 vs 51897) and physics by a massive 108.9% (5477 vs 2622). The physics result is the standout — the EPYC more than doubles the Xeon's score. Random string sorting goes to the EPYC by 21.1% (90064 vs 74360), and find prime numbers by 33.9% (292 vs 218). Data encryption favors the EPYC by 10.8% (40295 vs 36365), while data compression is close at 1.8% (739277 vs 726133). Integer math goes to the EPYC by 7.1% (202962 vs 189446).

The Intel Xeon w5-2565X's wins are focused. Extended instructions score 58976 versus 55822, a 5.3% lead. Floating-point math shows 147644 vs 126679, a 14.2% advantage. These are the only two benchmarks where the Xeon outperforms, but the floating-point margin is substantial and suggests a real strength in FP-heavy workloads. Single-thread scores are nearly identical: 3672 vs 3595, a 2.1% EPYC edge.

The Verdict

The benchmark data clearly favors the AMD EPYC 9135 for most workloads. It wins every Cinebench test by over 11%, takes PassMark multithread by 10.2%, and dominates in physics, prime number finding, and random string sorting. Its 96th percentile ranking versus the Xeon's 95th, combined with an 82980 average benchmark score versus 80671, places it ahead overall. The 4 nm Zen 5 architecture, 64 MB L3 cache, and twelve-channel memory provide the foundation for these results.

The Intel Xeon w5-2565X is the better choice only for workloads that heavily exercise floating-point math or extended instruction sets. Its 14.2% lead in floating-point math and 5.3% lead in extended instructions are the sole bright spots. The unlocked multiplier also appeals to users who want to manually tune clock speeds, though the stock boost clock of 4.80 GHz already exceeds the EPYC's 4.30 GHz.

For server deployments, database workloads, compression tasks, or general multi-threaded computing, the AMD EPYC 9135 is the data-backed winner. Its 128 PCIe lanes and 576.0 GB/s memory bandwidth also make it the superior choice for I/O-intensive environments. The Xeon w5-2565X remains relevant for scientific computing or financial modeling where FP performance is paramount, and its unlocked multiplier offers overclocking headroom. But with 15 wins versus 2, the EPYC 9135 is the benchmark champion.