Intel Xeon 658X vs Intel Xeon w7-2595X Comparison

The Intel Xeon 658X and Intel Xeon w7-2595X are both active, unlocked server/workstation processors aimed at demanding professional workloads, but the benchmark data shows a clear, consistent hierarchy between them. The Xeon 658X wins all 17 head-to-head benchmark comparisons included in the data, with advantages ranging from a marginal 0.1% to a dominant 150.6%. While the w7-2595X offers two more physical cores, the 658X compensates with a newer architecture, a significantly larger cache, and a much higher memory bandwidth, resulting in a performance sweep that makes it the straightforward choice for users prioritizing raw compute and memory throughput.

The Verdict

The data is unequivocal: the Intel Xeon 658X is the faster processor in every measured category. Its average benchmark score of 116,060 places it in the 97th percentile of all CPUs, and it sits just 0.3% behind the AMD EPYC 9255 and 0.8% ahead of the Intel Xeon 6527P in the nearest rival rankings. The Xeon w7-2595X also holds a 97th percentile standing with an average score of 108,663, but it trails the 658X by a substantial margin across the board.

For a builder choosing between these two, the decision hinges on whether the w7-2595X's advantages—two additional cores and a lower launch MSRP—outweigh the 658X's comprehensive performance lead. The w7-2595X has a launch MSRP of $2039, while the 658X is priced at $1699, making the 658X both cheaper and faster. The 658X is the clear pick for almost any scenario where CPU performance is the bottleneck, including rendering, simulation, and data-heavy workloads. The w7-2595X could only be considered if the specific platform requirements of the 658X (such as its Socket 4710 and eight-channel memory) are incompatible with an existing system, as the w7-2595X uses Socket 4677 and quad-channel memory.

FAQ

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

A: The Intel Xeon 658X wins all multi-core benchmarks. It scores 62,466 in Cinebench R23 multi-core, 13.9% ahead of the w7-2595X's 54,863. Similarly, in PassMark's multithread test, the 658X scores 73,490 versus 64,628 for the w7-2595X, a 13.7% lead.

Q: How do the two compare in single-threaded performance?

A: The 658X also leads in single-threaded tests, though by smaller margins. In Cinebench R23 single-core, the 658X scores 8,818, which is 13.9% higher than the w7-2595X's 7,745. In PassMark single-thread, the difference narrows to just 0.1%, with scores of 3,728 and 3,723 respectively.

Q: What is the biggest performance gap between the two chips?

A: The largest delta is in PassMark's find prime numbers test, where the 658X scores 649 versus 259 for the w7-2595X, a massive 150.6% advantage. The second-largest gap is in PassMark physics, where the 658X's 6,470 is 134.5% higher than the w7-2595X's 2,759.

Q: Does the w7-2595X have any advantages in the benchmark data?

A: No. The head-to-head benchmark table shows the 658X winning all 17 tests, with winsA equal to 17 and winsB equal to 0. The w7-2595X does not win a single comparison.

Q: Which processor has a higher core count?

A: The Intel Xeon w7-2595X has 26 cores and 52 threads, while the Intel Xeon 658X has 24 cores and 48 threads. Despite having two fewer cores, the 658X wins every multi-threaded benchmark.

Q: How do their memory systems differ?

A: The 658X supports an eight-channel memory bus with a bandwidth of 409.6 GB/s, while the w7-2595X uses a quad-channel bus with 153.6 GB/s bandwidth. Both support DDR5 and ECC memory.

Architecture Differences

The two processors come from different architectural generations, which explains much of the performance disparity. The Intel Xeon 658X is built on the Granite Rapids architecture, using a 5 nm process node, and belongs to the Xeon 600 (Granite Rapids-WS) generation. Its die size is listed as 2x 598 mm². In contrast, the Intel Xeon w7-2595X is based on the Sapphire Rapids architecture, fabricated on a 10 nm process node, and belongs to the Xeon W (Sapphire Rapids) generation.

The cache hierarchy is a major point of divergence. The 658X features 112 KB of L1 cache per core, 2 MB of L2 per core, and a massive 144 MB of shared L3 cache. The w7-2595X has a smaller 80 KB of L1 per core, the same 2 MB of L2 per core, but only 48.75 MB of L3 cache. This means the 658X has nearly three times the L3 cache, which is a significant advantage for workloads that repeatedly access large datasets.

Both processors are unlocked, allowing for overclocking, and both lack integrated graphics. They also share the same 250 W TDP, meaning the 658X achieves its performance lead within the same power envelope. The production status is listed as "Active" for both.

Specification Differences

The following table highlights the key specification differences between the two CPUs:

| Specification | Intel Xeon 658X | Intel Xeon w7-2595X |

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

| Cores | 24 | 26 |

| Threads | 48 | 52 |

| Base Clock | 3.00 GHz | 2.80 GHz |

| Boost Clock | 4.90 GHz | 4.80 GHz |

| Socket | Intel Socket 4710 | Intel Socket 4677 |

| Architecture | Granite Rapids | Sapphire Rapids |

| Process Node | 5 nm | 10 nm |

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

| L3 Cache | 144 MB (shared) | 48.75 MB |

| Memory Bus | Eight-channel | Quad-channel |

| Memory Bandwidth | 409.6 GB/s | 153.6 GB/s |

| PCIe Lanes | Gen 5, 128 Lanes (CPU only) | Gen 5, 64 Lanes (CPU only) |

| Part Number | SA2D2 | SRN4C |

The 658X has a higher base and boost clock, a newer and denser 5 nm process, a larger L1 cache, a much larger L3 cache, double the memory channels, and double the PCIe lanes. The w7-2595X only counters with two additional cores and threads. Both have a 250 W TDP and support DDR5 memory with ECC.

Head-to-Head Benchmarks

The benchmark results paint a picture of near-total dominance for the Intel Xeon 658X. The most striking wins come in specialized tasks. In PassMark's find prime numbers, the 658X scores 649, which is 150.6% higher than the w7-2595X's 259. This suggests a significant architectural advantage in integer-heavy, branch-predictor-sensitive workloads. Similarly, in PassMark physics, the 658X's 6,470 score is 134.5% above the w7-2595X's 2,759, indicating vastly superior performance in physics simulations.

Across the Cinebench suite, the margin is remarkably consistent. The 658X leads by 13.9% in R15 multi-core (6,296 vs 5,530), R15 single-core (888 vs 780), R20 multi-core (26,235 vs 23,042), R20 single-core (3,703 vs 3,252), R23 multi-core (62,466 vs 54,863), and R23 single-core (8,818 vs 7,745). This uniform 13.9% delta across both single and multi-threaded tests points to a clock-for-clock and core-for-core efficiency advantage for the Granite Rapids architecture.

In PassMark's general workload tests, the 658X's wins are smaller but still consistent. It leads by 8% in data compression (1,062,062 vs 983,046), 5.2% in data encryption (52,357 vs 49,782), 9% in extended instructions (84,626 vs 77,613), 3.7% in floating point math (210,480 vs 202,906), and 1% in integer math (263,995 vs 261,384). The margin in random string sorting is a mere 0.8% (103,028 vs 102,230), and in single-thread tests it narrows to just 0.1% (3,728 vs 3,723). These results show that while the 658X is universally faster, the gap is much smaller in memory-latency-bound or single-threaded tasks where the w7-2595X's extra two cores can help close the distance.

Where Each One Wins

The Intel Xeon 658X wins in every single benchmark category measured. Its most pronounced advantages are in compute-intensive and memory-hungry applications. The 150.6% lead in prime number calculation and 134.5% lead in physics make it the obvious choice for scientific computing, financial modeling, and physics-based simulation workloads. The 13.9% lead across all Cinebench versions solidifies its position for 3D rendering and content creation tasks, where both multi-core and single-core performance are critical.

The 658X also has structural advantages that matter for real-world systems. Its eight-channel memory bus provides 409.6 GB/s of bandwidth, compared to 153.6 GB/s for the w7-2595X, making it significantly better suited for data analytics, large-scale virtualization, and any workload that saturates memory bandwidth. The 128 PCIe Gen 5 lanes, double the w7-2595X's 64, allow for more expandability with GPUs, NVMe storage, and network cards.

The Intel Xeon w7-2595X, despite losing every benchmark, is not without a theoretical niche. It offers 26 cores versus 24, which could provide a marginal advantage in workloads that scale perfectly with core count but are not limited by memory bandwidth or cache. However, the benchmark data shows this advantage is not realized in practice, as the 658X wins all multi-threaded tests despite having fewer cores. The w7-2595X's only remaining advantage is its different socket (4677 vs 4710) and quad-channel memory, which could be relevant for someone upgrading an existing Socket 4677 platform without wanting to change motherboards. For any new build, the data strongly favors the Intel Xeon 658X.