Intel Core Ultra 7 265KF vs Intel Xeon 6517P Comparison

Intel Xeon 6517P and Intel Core Ultra 7 265KF target entirely different segments, yet their average benchmark scores sit within 0.6% of each other. The Xeon 6517P is a Granite Rapids server chip built for memory bandwidth and raw throughput, while the Core Ultra 7 265KF is an Arrow Lake desktop processor with higher clocks and a more modern 3nm node. The data shows a clear split: the Ultra 7 wins 15 of 17 head-to-head tests, but the Xeon takes the two most server-oriented workloads — and does so with decisive margins.

FAQ

Q: Which CPU has the higher average benchmark score?

A: The Intel Xeon 6517P edges out the Core Ultra 7 265KF with an average score of 72350 versus 71910, a 0.6% lead. Both CPUs sit at the 94th percentile against all CPUs.

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

A: The Core Ultra 7 265KF dominates single-thread tests, scoring 4928 in Passmark single-thread versus 3311 for the Xeon 6517P — a 32.8% advantage. The same trend appears in Cinebench R23 single-core, where the Ultra 7 scores 7021 against 5979.

Q: Is the Xeon 6517P better at any compute task?

A: Yes. The Xeon wins Passmark integer math (162671 vs 143351, a 13.5% lead) and Passmark physics (4452 vs 3633, a 22.5% lead). These are the only two head-to-head tests where the Xeon comes out ahead.

Q: What are the core and thread counts?

A: The Xeon 6517P has 16 cores and 32 threads, while the Core Ultra 7 265KF has 20 cores and 20 threads. The Ultra 7 lacks hyperthreading, explaining its lower thread count despite more cores.

Q: Do these CPUs support ECC memory?

A: Yes for the Xeon 6517P, which supports ECC memory. The Core Ultra 7 265KF does not support ECC memory. This is a critical distinction for workstation reliability.

Q: Which CPU has more PCIe lanes?

A: The Xeon 6517P provides 88 Gen 5 lanes (CPU only), while the Core Ultra 7 265KF provides 20 Gen 5 lanes (CPU only). This makes the Xeon far more suitable for multi-GPU or high-density storage configurations.

Architecture Differences

The two processors come from different foundries and nodes. The Xeon 6517P is built on Intel’s 5nm process under the Granite Rapids architecture, part of the Xeon 6 generation. The Core Ultra 7 265KF uses TSMC’s 3nm process with the Arrow Lake architecture, part of the Core Ultra Series 2. This node advantage helps explain the Ultra 7’s higher clocks: 5.50 GHz boost versus 4.20 GHz for the Xeon.

Cache layouts differ substantially. The Xeon 6517P allocates 112 KB L1 and 2 MB L2 per core, with 72 MB shared L3. The Core Ultra 7 265KF has larger per-core caches — 192 KB L1 and 3 MB L2 — but only 30 MB shared L3. The Xeon’s 72 MB L3 is more than double the Ultra 7’s, which benefits server workloads with large working sets.

Memory architecture is a major differentiator. The Xeon 6517P runs eight-channel DDR5 with 409.6 GB/s bandwidth, while the Core Ultra 7 265KF runs dual-channel DDR5 with 102.4 GB/s. That’s a 4x bandwidth advantage for the Xeon, directly feeding its integer math and physics wins. The Xeon also supports ECC memory; the Ultra 7 does not. Both lack integrated graphics.

The Xeon 6517P targets the server/workstation segment with an active production status and a launch MSRP of $1195. The Core Ultra 7 265KF is a desktop part with an unlocked multiplier and a launch MSRP of $379. The Xeon uses Intel Socket 4710, while the Ultra 7 uses Intel Socket 1851.

Head-to-Head Benchmarks

The Core Ultra 7 265KF wins every Cinebench test by a nearly uniform margin. In Cinebench R15 multicore, it scores 5013 versus 4268 — a 14.9% lead. The single-core R15 score shows the same 14.9% gap (707 vs 602). Cinebench R20 multicore (20889 vs 17787) and single-core (2948 vs 2511) both show a 14.8% advantage for the Ultra 7. Cinebench R23 multicore (49736 vs 42352) and single-core (7021 vs 5979) also land at 14.8% in favor of the Ultra 7. These consistent deltas suggest a clock-speed and IPC advantage rather than a workload-specific quirk.

Passmark results are more varied. The Ultra 7 wins data compression by a slim 2% (666589 vs 653338), extended instructions by 4.8% (54513 vs 51891), and multithread by 14.9% (58518 vs 49786). The biggest Ultra 7 wins come in data encryption (48198 vs 32385, a 32.8% lead), find prime numbers (486 vs 335, a 31.1% lead), floating point math (189431 vs 127497, a 32.7% lead), and single-thread (4928 vs 3311, a 32.8% lead). Random string sorting also favors the Ultra 7 by 15.4% (79735 vs 67480).

The Xeon 6517P’s two wins are substantial. In integer math, it scores 162671 against 143351, a 13.5% advantage. In physics, it scores 4452 against 3633, a 22.5% lead. These wins align with the Xeon’s eight-channel memory bandwidth and larger L3 cache, which help in workloads that stream data rather than rely on single-core speed.

Specification Differences

| Specification | Intel Xeon 6517P | Intel Core Ultra 7 265KF |

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

| Cores | 16 | 20 |

| Threads | 32 | 20 |

| Base Clock | 3.20 GHz | 3.90 GHz |

| Boost Clock | 4.20 GHz | 5.50 GHz |

| TDP | 190 W | 125 W |

| Socket | Intel Socket 4710 | Intel Socket 1851 |

| Architecture | Granite Rapids | Arrow Lake |

| Process Node | 5 nm (Intel) | 3 nm (TSMC) |

| L1 Cache | 112 KB (per core) | 192 KB (per core) |

| L2 Cache | 2 MB (per core) | 3 MB (per core) |

| L3 Cache | 72 MB (shared) | 30 MB (shared) |

| Memory Bus | Eight-channel | Dual-channel |

| Memory Bandwidth | 409.6 GB/s | 102.4 GB/s |

| ECC Memory | Yes | No |

| PCIe Lanes (CPU only) | Gen 5, 88 | Gen 5, 20 |

| Multiplier Unlocked | No | Yes |

| Launch MSRP | $1195 | $379 |

The Verdict

The data presents a clear tradeoff between platform capability and raw compute speed. The Core Ultra 7 265KF is the faster processor in 15 of 17 benchmarks, with advantages ranging from 2% in data compression to 32.8% in single-thread and encryption workloads. Its higher boost clock (5.50 GHz vs 4.20 GHz), larger per-core caches, and 3nm process node give it a decisive edge in most applications.

However, the Xeon 6517P is not a slower chip overall — it wins the two tests that matter most for server workloads. Its 13.5% lead in integer math and 22.5% lead in physics point to its eight-channel memory bus and 72 MB L3 cache. For workloads that stress memory bandwidth or require ECC reliability, the Xeon is the correct choice despite losing the majority of benchmarks.

The average benchmark scores are nearly identical (72350 vs 71910), but they reflect different strengths. The Ultra 7 is the better general-purpose and single-thread performer. The Xeon is the better data-center workhorse. Choose based on the application, not the aggregate score.

Where Each One Wins

Intel Xeon 6517P wins in:

• Integer math (162671 vs 143351) — benefits from 409.6 GB/s memory bandwidth and 72 MB L3 cache, ideal for database or analytics workloads.
• Physics (4452 vs 3633) — a 22.5% lead that suggests better handling of simulation-type tasks with large datasets.
• Memory bandwidth capacity — 4x the Ultra 7’s bandwidth, plus ECC support, makes it viable for memory-intensive server applications.
• PCIe expansion — 88 Gen 5 lanes versus 20, enabling many more GPUs or NVMe drives.
• Thread count — 32 threads versus 20, which helps in heavily parallel server workloads despite the lower multicore benchmark scores.

Intel Core Ultra 7 265KF wins in:

• Single-thread performance — 4928 vs 3311 in Passmark, a 32.8% lead; also wins all Cinebench single-core tests by ~14.8%.
• Floating point math (189431 vs 127497) — a 32.7% lead, useful for scientific computing and rendering.
• Data encryption (48198 vs 32385) — a 32.8% lead, beneficial for security-related tasks.
• Prime number finding (486 vs 335) — a 31.1% lead, indicating stronger per-core integer throughput.
• Multithread workloads — 58518 vs 49786 in Passmark, a 14.9% lead despite fewer threads, showing better scaling.
• Cinebench multicore — wins all three versions (R15, R20, R23) by ~14.8%, making it the better choice for content creation.
• Desktop flexibility — unlocked multiplier, lower TDP (125 W vs 190 W), and 20 PCIe lanes are sufficient for most single-GPU builds.