Intel Xeon 6731P vs Intel Xeon w5-2565X Comparison

Where Each One Wins

The benchmark data splits these two Intel Xeon processors into distinct roles. The Intel Xeon 6731P dominates the multi-threaded and specialized workload categories, taking 15 of 17 recorded head-to-head tests. Its wins are not narrow: in Passmark physics, it leads by 171%, and in Passmark find prime numbers, it leads by 148.2%. These are workloads that scale aggressively with core count and memory bandwidth, which is precisely where the 6731P's 32 cores and eight-channel memory subsystem excel.

The Intel Xeon w5-2565X claims only two wins, but they are significant for a different audience. In both Passmark single-thread and Passmark singlethread tests, the w5-2565X scores 3595 against the 6731P's 2107, a 41.4% advantage. This is not a marginal difference; it indicates a substantial per-core performance gap that favors lightly threaded applications, interactive workloads, or any task where a single thread's speed determines the outcome.

The use-case split is therefore clear. The 6731P is built for sustained, parallel throughput: data compression, encryption, extended instruction sets, prime number calculation, floating-point math, integer math, and physics simulations all show double-digit percentage leads. The w5-2565X is the choice when raw single-thread responsiveness matters more than aggregate throughput. The data shows no overlap in their strengths; each processor wins where its architectural priorities align with the workload's demands.

Architecture Differences

The two processors come from different Intel generations and manufacturing processes. The 6731P uses Granite Rapids architecture on a 5 nm process, while the w5-2565X uses Sapphire Rapids on a 10 nm process. This process gap partially explains the 6731P's ability to pack 32 cores into a 598 mm² die, though the die size for the w5-2565X is not recorded in the database.

Core and cache configurations differ sharply. The 6731P has 32 cores and 64 threads, with 112 KB of L1 cache per core and 2 MB of L2 per core. Its L3 cache is 144 MB shared across all cores. The w5-2565X has 18 cores and 36 threads, with 80 KB of L1 per core and 2 MB of L2 per core, but only 37.5 MB of L3 cache. The 6731P's L3 is nearly four times larger, which contributes to its advantage in data-heavy workloads like compression and encryption.

Memory architecture is another major divergence. The 6731P supports eight-channel DDR5 memory with a recorded bandwidth of 409.6 GB/s. The w5-2565X supports quad-channel DDR5 with 153.6 GB/s bandwidth. That 2.67x bandwidth advantage gives the 6731P a clear edge in memory-saturated tasks. PCIe connectivity also differs: the 6731P provides 136 Gen 5 lanes (CPU only), while the w5-2565X provides 64 Gen 5 lanes. Both support ECC memory, and neither has integrated graphics.

Socket compatibility is not shared. The 6731P uses Intel Socket 4710, while the w5-2565X uses Intel Socket 4677. The w5-2565X has an unlocked multiplier, indicating overclocking capability, whereas the 6731P does not. The 6731P was released later, on 2025-02-23, compared to the w5-2565X's 2024-08-23 release.

Head-to-Head Benchmarks

The Cinebench suite shows consistent but modest 6731P advantages. In Cinebench R15 multi-core, the 6731P scores 4522 against 4446 for the w5-2565X, a 1.7% lead. Single-core R15 is similarly close: 638 versus 627, a 1.8% lead. R20 multi-core repeats the pattern at 18845 versus 18527 (1.7%), and R20 single-core shows 2660 versus 2615 (1.7%). R23 multi-core gives 44871 versus 44112 (1.7%), with R23 single-core at 6334 versus 6227 (1.7%). These results indicate the 6731P's core-count advantage does not translate into large Cinebench multi-core wins, likely because Cinebench scales well with frequency and per-core efficiency, where the w5-2565X's higher boost clock of 4.80 GHz versus 4.10 GHz partially compensates.

Passmark tests reveal where the 6731P's architecture pulls ahead decisively. Data compression shows 799474 versus 726133, a 10.1% lead. Data encryption: 40087 versus 36365, a 10.2% lead. Extended instructions: 65656 versus 58976, an 11.3% lead. Floating-point math: 157330 versus 147644, a 6.6% lead. Integer math: 198761 versus 189446, a 4.9% lead. Random string sorting: 88019 versus 74360, an 18.4% lead. These are workloads that benefit from the 6731P's larger L3 cache, higher memory bandwidth, and additional cores.

The extreme outliers are Passmark physics and find prime numbers. Physics scores 7105 for the 6731P versus 2622 for the w5-2565X, a 171% difference. Prime numbers: 541 versus 218, a 148.2% difference. These tests appear highly sensitive to core count and memory parallelism, amplifying the 6731P's 32-core design. The only reversal is single-thread Passmark: 3595 for the w5-2565X versus 2107 for the 6731P, a 41.4% deficit for the 6731P. This single-thread gap is the w5-2565X's strongest selling point.

Specification Differences

| Specification | Intel Xeon 6731P | Intel Xeon w5-2565X |

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

| Cores | 32 | 18 |

| Threads | 64 | 36 |

| Base clock | 2.50 GHz | 3.20 GHz |

| Boost clock | 4.10 GHz | 4.80 GHz |

| TDP | 245 W | 240 W |

| Socket | Intel Socket 4710 | Intel Socket 4677 |

| Architecture | Granite Rapids | Sapphire Rapids |

| Process node | 5 nm | 10 nm |

| Die size | 598 mm² | Not recorded |

| L1 cache | 112 KB (per core) | 80 KB (per core) |

| L2 cache | 2 MB (per core) | 2 MB (per core) |

| L3 cache | 144 MB (shared) | 37.5 MB |

| Memory bus | Eight-channel | Quad-channel |

| Memory bandwidth | 409.6 GB/s | 153.6 GB/s |

| PCIe lanes | Gen 5, 136 (CPU only) | Gen 5, 64 (CPU only) |

| Multiplier unlocked | No | Yes |

| Release date | 2025-02-23 | 2024-08-23 |

The TDP difference is minor (245 W versus 240 W), but the performance per watt story is not recorded directly. The w5-2565X has higher base and boost clocks, which explains its single-thread dominance. The 6731P compensates with nearly double the cores and a much larger cache hierarchy. The memory bus width difference is the most consequential specification gap for bandwidth-bound workloads.

FAQ

Q: Which processor is faster in multi-threaded workloads?

A: The Intel Xeon 6731P wins all multi-threaded benchmark comparisons in the database. Its leads range from 1.7% in Cinebench R15/R20/R23 multi-core to 171% in Passmark physics and 148.2% in Passmark find prime numbers.

Q: Why does the w5-2565X win the single-thread tests?

A: The w5-2565X has a higher boost clock (4.80 GHz versus 4.10 GHz) and a higher base clock (3.20 GHz versus 2.50 GHz). In Passmark single-thread, it scores 3595 against the 6731P's 2107, a 41.4% advantage.

Q: How significant is the memory bandwidth difference?

A: The 6731P supports eight-channel memory with 409.6 GB/s bandwidth, while the w5-2565X supports quad-channel with 153.6 GB/s. This 2.67x gap likely contributes to the 6731P's large wins in data compression (10.1%) and random string sorting (18.4%).

Q: Are these processors compatible with the same motherboard?

A: No. The 6731P uses Intel Socket 4710, while the w5-2565X uses Intel Socket 4677. They are not interchangeable.

Q: Does the w5-2565X support overclocking?

A: Yes, its multiplier is unlocked. The 6731P's multiplier is locked, so it does not offer the same overclocking flexibility.

Q: What is the L3 cache difference?

A: The 6731P has 144 MB of shared L3 cache, while the w5-2565X has 37.5 MB. This nearly fourfold difference helps the 6731P in cache-sensitive workloads like extended instructions (11.3% lead) and encryption (10.2% lead).

The Verdict

The recorded data points to two different buyers. The Intel Xeon 6731P is the choice for workloads that can use 32 cores and 64 threads effectively. Its 144 MB L3 cache, eight-channel memory, and 409.6 GB/s bandwidth deliver decisive wins in physics, prime number calculation, data compression, encryption, and random string sorting. The 96th percentile ranking among all CPUs, with an average benchmark score of 87756, places it slightly above the AMD EPYC 7F72 by 3.2% and just behind the AMD Ryzen AI Max+ 392 by 3.1%. For server or workstation tasks that are parallel by nature, the 6731P's 15 benchmark wins make it the superior option.

The Intel Xeon w5-2565X serves a narrower but real need. Its 41.4% single-thread advantage over the 6731P is the largest performance gap in either direction across the entire benchmark set. For applications that cannot parallelize, or where per-core latency is critical, the w5-2565X's higher clocks and unlocked multiplier offer a meaningful speedup. Its 95th percentile ranking and average score of 80671 indicate it remains a strong processor overall, despite losing most head-to-head tests. The w5-2565X also has a lower launch MSRP of $1339, but the 6731P's launch MSRP is $2700; the database does not include performance-per-dollar metrics, so the price comparison is left as a raw fact.

The data suggests no universal winner. The 6731P is the throughput king, the w5-2565X is the single-thread specialist. Choose based on the workload's parallelism, not on aggregate scores.