Intel Xeon w7-3555 vs Intel Xeon w7-3565X Comparison

The Intel Xeon w7-3565X and Intel Xeon w7-3555 are both 10 nm Sapphire Rapids workstation processors on the Intel Socket 4677 platform, sharing the same boost clock, memory architecture, and PCIe layout. The data shows the w7-3565X is the superior processor for nearly every heavy workload, winning 14 of 17 head-to-head benchmark comparisons. The w7-3555 counters with a notable victory in physics simulation and a slight edge in single-threaded PassMark tests, but the w7-3565X dominates in multithreaded rendering, data encryption, and math-heavy tasks.

Where Each One Wins

The Intel Xeon w7-3565X is the clear choice for multithreaded productivity and data-centric workloads. Its 32 cores and 64 threads give it a decisive structural advantage over the 28-core, 56-thread w7-3555. In Cinebench R23 multicore, the w7-3565X scores 60045 against 57590 for the w7-3555, a 4.3% lead. This advantage extends across the entire Cinebench suite, with the w7-3565X winning R15, R20, and R23 in both single and multicore tests by the same 4.3% margin. For professionals running 3D rendering, video encoding, or software compilation, the w7-3565X provides consistent gains.

The gap widens significantly in PassMark data processing tests. The w7-3565X leads by 11.2% in data compression, 13.9% in data encryption, and 10.6% in extended instructions. Its largest victories come in floating point math (14.6% ahead) and integer math (14.1% ahead), making it the stronger option for scientific computing, financial modeling, and any workload that stresses arithmetic throughput. The w7-3565X also wins random string sorting by 15.3%, indicating better memory access patterns for sorting algorithms.

The w7-3555 wins in two specific areas. It leads in PassMark physics by a substantial 26.7%, scoring 5802 against 4254 for the w7-3565X. This suggests the w7-3555 has an advantage in single-thread physics calculations despite having fewer cores. It also wins PassMark single-thread with a score of 3549 versus 3407, a 4% difference. Users running legacy software that relies on a single thread may notice the w7-3555 is slightly faster in those scenarios, though the practical impact is modest.

The passmark_find_prime_numbers test shows a tie at 398 for both processors, indicating identical performance in prime number generation, a workload that appears to be unaffected by the core count difference.

Architecture Differences

Both processors share the Sapphire Rapids codename and are built on Intel's 10 nm process with a die size of 4x 477 mm². The fundamental difference lies in core configuration. The w7-3565X packs 32 cores and 64 threads, while the w7-3555 has 28 cores and 56 threads. This 4-core, 8-thread gap drives most of the performance differential in multithreaded benchmarks.

The w7-3565X ships with 82.5 MB of L3 cache, while the w7-3555 has 75 MB, a 7.5 MB difference that benefits the larger chip in cache-sensitive workloads. Both processors allocate 80 KB of L1 cache and 2 MB of L2 cache per core, so per-core cache behavior is identical. The w7-3565X is multiplier unlocked, allowing overclocking, while the w7-3555 has a locked multiplier. This is a meaningful distinction for enthusiasts who want to push clock speeds beyond the 4.80 GHz boost limit.

Base clock frequencies differ slightly. The w7-3565X runs at 2.50 GHz base, while the w7-3555 runs at 2.70 GHz base, a 200 MHz advantage for the smaller chip that partially explains its single-thread wins. Both reach the same 4.80 GHz boost clock. Thermal design power is close: 335 W for the w7-3565X and 325 W for the w7-3555. The w7-3565X consumes 10 W more, a small price for the additional cores and cache.

Memory support is identical: DDR5 with an eight-channel bus and 307.2 GB/s of bandwidth. Both support ECC memory and offer Gen 5 PCIe with 112 lanes (CPU only). They share the same release date of 2024-08-23 and the same Intel Socket 4677. The launch MSRP for the w7-3565X is $2689, and for the w7-3555 it is $2339. Both are listed as active production server/workstation parts.

Head-to-Head Benchmarks

The Cinebench results are uniform. Across R15, R20, and R23, the w7-3565X wins every single and multicore test by exactly 4.3%. In R15 multicore, it scores 6052 against 5804; in R15 singlecore, 854 against 819. R20 multicore shows 25218 versus 24187, and R20 singlecore shows 3560 versus 3414. R23 multicore reaches 60045 versus 57590, with singlecore at 8477 versus 8130. This consistent 4.3% delta suggests the core count advantage scales linearly in rendering workloads.

PassMark results show a different pattern. The w7-3565X wins data compression with 1075602 against 966970, an 11.2% margin. Data encryption shows the largest relative gap in this suite at 13.9%, with scores of 54676 and 48007. Extended instructions go to the w7-3565X at 85856 versus 77619, a 10.6% lead. Floating point math favors the w7-3565X at 218720 against 190917, a 14.6% difference, the largest win for either processor in the entire comparison. Integer math follows at 279202 versus 244642, a 14.1% gap. Random string sorting goes to the w7-3565X at 110848 versus 96112, a 15.3% margin. Multithread score is closer at 70642 versus 67754, a 4.3% lead for the w7-3565X.

The w7-3555 wins PassMark physics decisively at 5802 versus 4254, a 26.7% advantage that is the largest single-test margin in either direction. It also wins PassMark single-thread at 3549 versus 3407, a 4% lead. The prime numbers test is a dead tie at 398 for both.

FAQ

Q: Which processor is faster in Cinebench multicore tests?

A: The Intel Xeon w7-3565X wins all Cinebench multicore tests by 4.3%. In R23 multicore, it scores 60045 versus 57590 for the w7-3555.

Q: Why does the w7-3555 win the PassMark physics test?

A: The w7-3555 scores 5802 in PassMark physics against 4254 for the w7-3565X, a 26.7% advantage. This appears to be a workload where the w7-3555's higher 2.70 GHz base clock and different core scheduling provide an edge, despite having fewer cores.

Q: Do both processors support the same memory and PCIe configurations?

A: Yes. Both support DDR5 with an eight-channel bus and 307.2 GB/s bandwidth, and both offer Gen 5 PCIe with 112 lanes (CPU only). Both also support ECC memory.

Q: Is the w7-3565X overclockable?

A: Yes, the w7-3565X has an unlocked multiplier. The w7-3555 has a locked multiplier, so it cannot be overclocked in the same way.

Q: What is the core and thread difference between the two?

A: The w7-3565X has 32 cores and 64 threads, while the w7-3555 has 28 cores and 56 threads. The w7-3565X also has 82.5 MB of L3 cache versus 75 MB for the w7-3555.

Q: How large is the performance gap in data encryption?

A: The w7-3565X wins data encryption by 13.9%, scoring 54676 against 48007 for the w7-3555.

The Verdict

The data is unambiguous for most users: the Intel Xeon w7-3565X is the better workstation processor. It wins 14 of 17 head-to-head benchmarks, including every Cinebench test, all major PassMark processing tests, and multithread performance. Its 32 cores and 64 threads, combined with 82.5 MB of L3 cache, deliver consistent 4.3% to 15.3% improvements over the w7-3555 across rendering, encryption, and math workloads. The unlocked multiplier adds flexibility for those who want to extract additional performance.

The Intel Xeon w7-3555 is the choice for a narrow set of scenarios. Its 26.7% win in PassMark physics and 4% win in single-thread PassMark tests indicate it may be better for applications that are heavily dependent on single-thread performance or specific physics calculations. Its higher 2.70 GHz base clock and lower 325 W TDP make it slightly more efficient at idle and lightly threaded tasks. For users who rarely push all cores simultaneously, the w7-3555 offers comparable performance in many everyday operations.

For multithreaded rendering, data processing, scientific computing, or any workload that scales with core count, the w7-3565X is the clear pick. The 4.3% Cinebench lead and 14% plus margins in math tests justify its higher launch MSRP of $2689 versus $2339 for the w7-3555. The w7-3555 serves a smaller audience of single-thread-focused users who need the physics performance and are willing to sacrifice multicore throughput.

Specification Differences

| Specification | Intel Xeon w7-3565X | Intel Xeon w7-3555 |

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

| Cores | 32 | 28 |

| Threads | 64 | 56 |

| Base Clock | 2.50 GHz | 2.70 GHz |

| Boost Clock | 4.80 GHz | 4.80 GHz |

| TDP | 335 W | 325 W |

| L3 Cache | 82.5 MB | 75 MB |

| Multiplier | Unlocked | Locked |

| Launch MSRP | $2689 | $2339 |

| Part Number | SRN73 | SRN75 |

Both processors share the same Intel Socket 4677, 10 nm process, 4x 477 mm² die size, DDR5 memory support with an eight-channel bus, 307.2 GB/s memory bandwidth, ECC support, Gen 5 PCIe with 112 lanes, and the same 2024-08-23 release date. The w7-3565X has an 80 KB L1 and 2 MB L2 cache per core, identical to the w7-3555. Neither has integrated graphics.