Intel Xeon 6710E vs Intel Xeon 676X Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive overall victory for the Intel Xeon 676X, which claims 14 of the 16 head-to-head benchmark comparisons. The average benchmark score gap is substantial: the 676X records an average score of 158,540 against the 6710E's 129,930, a difference of roughly 22%. The Xeon 676X also sits at the 98th percentile of all CPUs in the database, while the 6710E sits at the 97th percentile, confirming both are high-end parts but with a clear performance hierarchy.

The most dramatic single-threaded result comes from the PassMark single-thread test, where the 676X scores 4,015 versus the 6710E's 1,910, a 110.2% advantage. This is consistent with the Cinebench single-core results: in Cinebench R15 single-core, the 676X wins 1,101 to 747 (47.4% ahead), and in R20 single-core it wins 4,591 to 3,113 (47.5% ahead). These numbers reflect the fundamental clock speed difference, as the 676X boosts to 4.90 GHz while the 6710E tops out at 3.20 GHz.

Multi-threaded workloads tell a similar story, though the margin narrows slightly. In Cinebench R23 multi-core, the 676X scores 77,447 against the 6710E's 52,508, a 47.5% lead. The same 47.5% delta appears in Cinebench R15 multi-core (7,806 vs 5,292) and Cinebench R20 multi-core (32,527 vs 22,053). The PassMark multi-thread test shows the 676X at 91,115 versus 61,775, again a 47.5% advantage. This consistency across three Cinebench generations and PassMark suggests a stable architectural performance ratio rather than a workload-specific anomaly.

The 676X also dominates in extended instruction throughput. The PassMark extended instructions test shows the 676X scoring 105,231 versus the 6710E's 59,625, a 76.5% lead. Prime number finding follows a similar pattern: 738 versus 451, a 63.6% delta. Physics calculations show a 65.6% advantage (8,281 vs 5,000). Floating-point math favors the 676X by 28.9% (283,570 vs 219,926), and integer math by 17.1% (354,777 vs 302,954). Data compression is closer, with the 676X ahead by 10.2% (1,355,807 vs 1,230,786).

The 6710E wins only two comparisons, both in specific PassMark sub-tests. Data encryption is one: the 6710E scores 81,850 versus the 676X's 67,638, a 17.4% advantage for the 6710E. Random string sorting is the other: 151,491 versus 137,976, an 8.9% edge for the 6710E. These wins are notable because they occur in memory-latency-sensitive and cache-capacity-sensitive workloads, areas where the 6710E's 4 MB per module L2 cache and higher core count can offset lower clock speeds.

Architecture Differences

The two processors belong to different Intel Xeon 6 sub-families. The 676X is built on the Granite Rapids architecture, specifically the Granite Rapids-WS workstation variant, while the 6710E uses the Sierra Forest architecture from the Sierra Forest-SP server family. Both are fabricated on Intel's 5 nm process node, so the process technology itself is identical; the divergence lies in the core design philosophy.

The 676X is a performance-core design with 32 cores and 64 threads. Each core carries 112 KB of L1 cache and 2 MB of L2 cache, backed by a shared 144 MB L3 cache. The 6710E, by contrast, is a efficiency-core design with 64 cores but only 64 threads, meaning it runs one thread per core. Its L1 cache is smaller at 96 KB per core, but its L2 cache is organized differently: 4 MB per module rather than per core. The shared L3 cache is 96 MB, which is smaller than the 676X's 144 MB.

The die sizes differ considerably. The 676X uses a dual-die configuration totaling 2x 598 mm², while the 6710E uses a single die of 578 mm². This explains why the 676X, despite fewer cores, has a larger total silicon area: the performance cores and their associated cache hierarchies require more physical space.

Memory support is DDR5 for both, with eight-channel memory buses. However, the 676X achieves a higher memory bandwidth of 409.6 GB/s versus the 6710E's 358.4 GB/s. Both support ECC memory, which is critical for server and workstation reliability. PCIe connectivity also differs: the 676X provides Gen 5 with 128 lanes (CPU only), while the 6710E offers Gen 5 with 88 lanes (CPU only). This makes the 676X the better fit for bandwidth-hungry accelerator configurations.

The 676X has an unlocked multiplier, while the 6710E does not. The 676X also has a higher TDP at 275 watts versus the 6710E's 205 watts, reflecting its higher clock speeds and larger cache. The release dates are separated by roughly 20 months: the 6710E launched in June 2024, and the 676X in February 2026. The 676X's part number is SA2CY; the 6710E's is SRPG2. Neither has integrated graphics.

FAQ

Q: Which processor wins in single-threaded performance?

A: The Intel Xeon 676X wins by a wide margin. The PassMark single-thread score is 4,015 versus 1,910, a 110.2% advantage. Cinebench R15 single-core shows 1,101 versus 747 (47.4% ahead), and R20 single-core shows 4,591 versus 3,113 (47.5% ahead).

Q: Does the 6710E's higher core count help in any benchmark?

A: Yes, in two PassMark sub-tests. The 6710E wins data encryption (81,850 versus 67,638, a 17.4% advantage) and random string sorting (151,491 versus 137,976, an 8.9% advantage). These are the only two head-to-head benchmarks where the 6710E comes out ahead.

Q: How do the cache hierarchies compare?

A: The 676X has 112 KB of L1 per core, 2 MB of L2 per core, and 144 MB of shared L3. The 6710E has 96 KB of L1 per core, but its L2 is organized as 4 MB per module rather than per core, and its shared L3 is 96 MB. The 676X has the larger total cache.

Q: What are the clock speed differences?

A: The 676X has a base clock of 2.80 GHz and a boost clock of 4.90 GHz. The 6710E has a base clock of 2.40 GHz and a boost clock of 3.20 GHz. The 676X's boost clock is 1.70 GHz higher.

Q: Which processor has more PCIe lanes?

A: The 676X provides 128 PCIe Gen 5 lanes (CPU only), while the 6710E provides 88 PCIe Gen 5 lanes (CPU only). This gives the 676X more headroom for multiple GPUs or NVMe devices.

Q: Is there a difference in memory bandwidth?

A: Yes. The 676X achieves 409.6 GB/s with its eight-channel DDR5 configuration, while the 6710E achieves 358.4 GB/s on the same eight-channel DDR5 bus. Both support ECC memory.

Specification Differences

| Field | Intel Xeon 676X | Intel Xeon 6710E |

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

| Cores | 32 | 64 |

| Threads | 64 | 64 |

| Base Clock | 2.80 GHz | 2.40 GHz |

| Boost Clock | 4.90 GHz | 3.20 GHz |

| TDP | 275 W | 205 W |

| Architecture | Granite Rapids | Sierra Forest |

| Generation | Xeon 600 (Granite Rapids-WS) | Xeon 6 (Sierra Forest-SP) |

| Die Size | 2x 598 mm² | 578 mm² |

| L1 Cache | 112 KB (per core) | 96 KB (per core) |

| L2 Cache | 2 MB (per core) | 4 MB (per module) |

| L3 Cache | 144 MB (shared) | 96 MB (shared) |

| Memory Bandwidth | 409.6 GB/s | 358.4 GB/s |

| PCIe | Gen 5, 128 Lanes (CPU only) | Gen 5, 88 Lanes (CPU only) |

| Multiplier Unlocked | Yes | No |

| Release Date | February 2026 | June 2024 |

| Part Number | SA2CY | SRPG2 |

The Verdict

The data makes the choice clear for most workloads: the Intel Xeon 676X is the stronger processor. It wins 14 of 16 head-to-head comparisons, with leads ranging from 10.2% in data compression to 110.2% in single-threaded PassMark. Its average benchmark score of 158,540 places it at the 98th percentile of all CPUs, and it compares favorably to its nearest rivals: it sits 2.4% ahead of the Intel Xeon 6745P and 1.1% behind the AMD EPYC 9355P, with the delta to the AMD EPYC 7663 at 2.1% and to the AMD EPYC 9375F at 2.4%. The 676X is the pick for single-threaded responsiveness, high-clock multi-threaded rendering, floating-point math, and extended instruction workloads.

The 6710E is not without merit. Its 97th percentile ranking and average score of 129,930 place it just 2.5% ahead of the AMD EPYC 9354 and 4.1% ahead of the Intel Xeon 6730P in its own rival group. Its wins in data encryption and random string sorting suggest that certain memory-latency-sensitive or cache-friendly workloads can benefit from its 64-core configuration and 4 MB per module L2 cache. Its lower TDP of 205 watts versus 275 watts also makes it the more power-conscious option, and its lower boost clock of 3.20 GHz is offset by having twice the core count in some scenarios.

For buyers prioritizing peak performance, particularly in single-threaded tasks, physics simulations, and extended instruction sets, the 676X is the data-backed choice. For workloads that specifically benefit from high core counts in encryption or sorting tasks, the 6710E offers a measurable advantage in those narrow niches. The 676X's larger L3 cache, higher memory bandwidth, and 128 PCIe lanes further tilt the balance toward it for workstation and accelerator-dense deployments. The 6710E, with its earlier release and efficiency-core design, remains a viable server option where its specific strengths align with the application profile.