Intel Xeon 6517P vs Intel Xeon Platinum 8270 Comparison

The Intel Xeon 6517P and Intel Xeon Platinum 8270 represent two distinct eras of Intel server silicon, and the benchmark data shows a clear generational shift in performance. The 6517P, a Granite Rapids part, decisively outpaces the older Cascade Lake-based 8270 in the vast majority of tests, winning 15 of the 17 head-to-head comparisons. However, the 8270 still holds a couple of surprising wins that are worth examining for specific workloads.

Head-to-Head Benchmarks

The most striking pattern in this comparison is the sheer consistency of the Intel Xeon 6517P's victory margin across all Cinebench tests. In Cinebench R15 multicore, the 6517P scores 4268 against the 8270's 2878, a 48.3% advantage. This exact delta repeats in R20 (17787 vs 11995) and R23 (42352 vs 28561), showing that the performance gap is not tied to a specific benchmark version but reflects a fundamental architectural superiority in rendering workloads. The single-core Cinebench results tell the same story, with the 6517P leading by 48.3% in R15 (602 vs 406), R20 (2511 vs 1693), and R23 (5979 vs 4032).

The PassMark suite reinforces this trend with even more dramatic deltas in some tests. The 6517P's lead is astronomical in encryption and prime number finding. In data encryption, the 6517P scores 32385 versus just 8798 for the 8270, a 268.1% improvement. Even more lopsided is the find prime numbers test, where the 6517P's 335 score dwarfs the 8270's 84, a 298.8% margin. Physics simulation also heavily favors the newer chip, with the 6517P scoring 4452 against 903, a massive 393% advantage. The multithread test shows a 66% lead (49786 vs 29986), while single-thread performance is 42.4% ahead (3311 vs 2325).

Not all results are so one-sided. The Intel Xeon Platinum 8270 wins the data compression test with a score of 728144 versus 653338, a 10.3% advantage for the older chip. It also takes random string sorting, scoring 80208 against 67480, a 15.9% lead. These wins are notable because they occur despite the 8270's general deficit, suggesting that its larger core count of 26 versus 16 provides a real benefit for certain parallel memory-bound operations. In contrast, the 6517P wins the remaining tests by narrower margins: extended instructions (51891 vs 51191, 1.4%), integer math (162671 vs 160322, 1.5%), and floating point math (127497 vs 99432, 28.2%). The overall benchmark average tells the story: the 6517P averages 72350 versus 71370 for the 8270, a 1.4% difference that places the 8270 as the fourth nearest rival to the 6517P.

FAQ

Q: Which processor has the higher single-thread performance?

A: The Intel Xeon 6517P wins every single-thread test. In Cinebench R23, it scores 5979 versus 4032 for the 8270, a 48.3% lead. PassMark single-thread shows a 42.4% advantage (3311 vs 2325).

Q: Does the Intel Xeon Platinum 8270 win any benchmark?

A: Yes, it wins two tests. It takes data compression with 728144 versus 653338 (a 10.3% lead) and random string sorting with 80208 versus 67480 (a 15.9% lead).

Q: How do the processors compare in multi-threaded workloads?

A: The 6517P is substantially faster. It leads by 48.3% in all Cinebench multicore tests and by 66% in the PassMark multithread test (49786 vs 29986). This is despite the 8270 having more cores and threads.

Q: What is the difference in their average benchmark scores?

A: The 6517P has an average benchmark score of 72350, while the 8270 averages 71370. This puts the 6517P 1.4% ahead, and the 8270 is listed as a nearest rival with a deltaPct of 1.4.

Q: Which processor has the higher core count?

A: The Intel Xeon Platinum 8270 has 26 cores and 52 threads, while the Intel Xeon 6517P has 16 cores and 32 threads. The 6517P wins despite the core deficit.

Q: Is the performance gap consistent across all test categories?

A: No. The 6517P dominates in most categories, but the 8270 shows strength in compression and sorting. The 6517P's wins range from a narrow 1.4% in extended instructions to a 393% lead in physics, showing its advantage is not uniform.

Architecture Differences

The two processors are built on fundamentally different architectures. The Intel Xeon 6517P uses the Granite Rapids architecture on a 5 nm process node, while the Intel Xeon Platinum 8270 uses the older Cascade Lake architecture on a 14 nm node. This process shrink is a major factor in the 6517P's performance advantage, allowing for higher clock speeds and better efficiency. The 6517P's cache layout is also different: it has 112 KB of L1 cache per core, 2 MB of L2 per core, and 72 MB of shared L3 cache. The 8270 has 64 KB of L1 per core, 1 MB of L2 per core, and only 35.75 MB of shared L3. The 6517P's larger L3 cache is likely a contributor to its strong performance in encryption and prime number tests.

Memory support is another key architectural divergence. The 6517P uses DDR5 memory with an eight-channel bus and a memory bandwidth of 409.6 GB/s. The 8270 uses DDR4 memory, and no memory bus or bandwidth figures are available for it. The 6517P also supports PCIe Gen 5 with 88 lanes (CPU only), whereas the 8270 has no PCIe information listed. Both processors support ECC memory. The 6517P is manufactured with 8,000 million transistors according to the data, while the 8270's transistor count is not listed. The 6517P is a newer part, released on 2025-02-23, while the 8270 was released on 2018-12-10.

Specification Differences

The most obvious specification difference is core count. The Intel Xeon Platinum 8270 has 26 cores and 52 threads, versus 16 cores and 32 threads for the Intel Xeon 6517P. However, the 6517P compensates with higher clock speeds: its base clock is 3.20 GHz versus 2.70 GHz for the 8270, and its boost clock is 4.20 GHz versus 4.00 GHz. The 6517P also has a lower TDP of 190 watts compared to 205 watts for the 8270, which is notable given its performance advantage.

The sockets are completely different. The 6517P uses Intel Socket 4710, while the 8270 uses Intel Socket 3647. This means they are not interchangeable in the same motherboard. The 6517P supports DDR5 memory, while the 8270 supports DDR4. The 6517P has a larger L3 cache (72 MB shared) versus 35.75 MB shared for the 8270. The 6517P is a 5 nm part, while the 8270 is 14 nm. The 6517P has a launch MSRP of $1195, while the 8270 has no launch MSRP listed. The 6517P's part number is SRVU4, and the 8270's is SRF96CD8069504195201. Both are locked multipliers and target the server/workstation market segment.

Where Each One Wins

The Intel Xeon 6517P is the clear winner for compute-heavy workloads that rely on raw processing power. Its 48.3% lead in all Cinebench tests makes it the obvious choice for rendering, 3D modeling, and any CPU-bound creative application. The massive leads in encryption (268.1%), prime number finding (298.8%), and physics (393%) point to strengths in scientific computing, cryptography, and simulation workloads. The 66% multithread advantage and 42.4% single-thread lead further solidify its position for general server duties. If a workload involves floating point math, the 6517P's 28.2% lead (127497 vs 99432) is significant. Its DDR5 memory support and higher memory bandwidth of 409.6 GB/s make it well-suited for memory-intensive tasks.

The Intel Xeon Platinum 8270's wins are narrow but specific. Its 10.3% lead in data compression (728144 vs 653338) and 15.9% lead in random string sorting (80208 vs 67480) suggest it retains an edge in data manipulation and sorting tasks. This could be relevant for database operations, file compression, or ETL pipelines where data is being reorganized rather than computed. The 8270's higher core count of 26 versus 16 likely contributes to these wins, as these workloads can often scale with core count even if each core is less efficient. For integer math, the two are nearly tied, with the 6517P only 1.5% ahead, so either processor would be acceptable for integer-heavy but not encryption-focused workloads.

The Verdict

The data is unambiguous: the Intel Xeon 6517P is the superior processor for almost all workloads. It wins 15 of 17 benchmarks, including every Cinebench test and the majority of PassMark tests, with some margins exceeding 300%. Its higher clock speeds, newer 5 nm process, larger L3 cache, and DDR5 support allow it to overcome a 10-core deficit in core count. The 6517P should be the choice for any new server or workstation build where performance is the priority, particularly for rendering, simulation, encryption, or physics-based computing.

The Intel Xeon Platinum 8270 is the pick only for a narrow set of use cases. Its wins in data compression and random string sorting are real, and its 26 cores provide a thread-count advantage that some parallel data tasks can leverage. However, these wins are isolated and do not offset the 6517P's dominance elsewhere. The 8270 is also a much older part, released in 2018 versus 2025, and lacks modern memory and PCIe support. For any organization standardizing on a platform, the 6517P is the rational choice. The 8270 should only be considered if a system is already built around Socket 3647 and the specific compression or sorting workloads are critical enough to justify the performance penalty elsewhere.