Intel Xeon 6520P vs Intel Xeon w7-3555 Comparison

Head-to-Head Benchmarks

The benchmark data reveals a clear overall winner, but the story is not one-sided. The Intel Xeon w7-3555 claims victory in 15 of the 17 recorded tests, with the Intel Xeon 6520P taking only two. The margin of victory, however, varies dramatically depending on the workload.

In the Cinebench suite, the Xeon w7-3555 demonstrates consistent superiority across all six tests. The multicore results show a remarkably uniform advantage: 5804 versus 5392 in R15 (a 7.6% lead), 24187 versus 22467 in R20 (7.7%), and 57590 versus 53495 in R23 (7.7%). The single-core results mirror this pattern almost exactly, with the w7-3555 leading by 7.6% in R15 (819 versus 761) and by 7.7% in both R20 (3414 versus 3171) and R23 (8130 versus 7552). This consistency suggests the w7-3555's clock speed advantage translates directly into both single-threaded and multi-threaded rendering performance.

The Passmark suite paints a more nuanced picture. The w7-3555 dominates in several compute-heavy workloads. Extended instructions show the largest gap: 77619 versus 64557, a 20.2% advantage. Floating point math follows closely at 17.2% (190917 versus 162862), while integer math sits at 14.2% (244642 versus 214288). Data compression shows a 14.9% lead (966970 versus 841518), and data encryption trails at 6.2% (48007 versus 45188). The multithread aggregate score favors the w7-3555 by 7.7% (67754 versus 62936), while single-thread performance shows a 5.8% edge (3549 versus 3356).

The Xeon 6520P's two wins are intriguing. In find prime numbers, it scores 526 versus 398, a 24.3% advantage that represents the largest single-test gap in either direction. Physics simulation shows a 19.5% lead (7209 versus 5802). These results suggest the 6520P's architecture handles certain integer-heavy or physics-based workloads more efficiently, despite having fewer cores. The random string sorting test is nearly a dead heat: 96112 versus 95736, a razor-thin 0.4% margin for the w7-3555.

The aggregate benchmark scores confirm the overall picture. The w7-3555 averages 106192 across all tests, placing it in the 97th percentile of all CPUs tracked. The 6520P averages 93786, sitting in the 96th percentile. The w7-3555's nearest rival, the AMD Ryzen 9 9850HX, scores 106413, a -0.2% delta, meaning the two are effectively tied. The 6520P's closest competitor, the Intel Core Ultra 7 270K Plus, scores 93785, a 0.0% delta, again an exact match.

FAQ

Q: Which processor wins more benchmark tests?

A: The Intel Xeon w7-3555 wins 15 of the 17 head-to-head tests. The Intel Xeon 6520P wins only 2: find prime numbers and physics simulation.

Q: What is the largest performance gap between the two?

A: The w7-3555 leads by 20.2% in extended instructions (77619 versus 64557). The 6520P's largest win is 24.3% in find prime numbers (526 versus 398).

Q: How close are the two in single-threaded performance?

A: The w7-3555 leads by 5.8% in Passmark single-thread (3549 versus 3356) and by 7.6-7.7% across all three Cinebench single-core tests.

Q: Does the 6520P ever outperform the w7-3555 in multi-core workloads?

A: No. The w7-3555 leads in all Cinebench multicore tests by 7.6-7.7%, and in Passmark multithread by 7.7%.

Q: How do the two compare to their nearest rivals?

A: The w7-3555 is effectively tied with the AMD Ryzen 9 9850HX (-0.2%) and slightly ahead of the Intel Xeon 6521P (0.3%). The 6520P is exactly tied with the Intel Core Ultra 7 270K Plus (0.0%) and trails the AMD EPYC 4564P by 1.5%.

Q: Which processor has a higher average benchmark score?

A: The w7-3555 averages 106192, which is 123.4% of the 6520P's 93786 average.

Where Each One Wins

The w7-3555 is the clear choice for rendering, content creation, and general compute workloads. Its Cinebench dominance across all three versions (R15, R20, R23) indicates strong performance in 3D rendering, animation, and video encoding tasks that rely on both multicore throughput and single-thread responsiveness. The 7.7% multicore lead and 7.6-7.7% single-core lead mean users get consistent gains regardless of whether the workload scales across all 28 cores or runs on just one.

The w7-3555 also excels in data processing and scientific computing. The 20.2% advantage in extended instructions suggests better support for SIMD and vectorized code, common in scientific simulations, financial modeling, and data analytics. The 17.2% floating-point lead reinforces this, as does the 14.2% integer math advantage. The 14.9% compression lead makes it preferable for database workloads, file archiving, and data warehousing.

The 6520P's strengths are narrower but real. Its 24.3% win in prime number finding indicates superior performance in algorithms that involve modular arithmetic, cryptography, or number theory. The 19.5% physics lead suggests it handles rigid body dynamics, collision detection, or particle simulations more efficiently, which could benefit certain game physics or engineering simulation tasks. The near-tie in random string sorting (0.4% delta) means either processor handles text processing and sorting tasks adequately.

For mixed workloads, the w7-3555's broad dominance makes it the safer choice. The 6520P's two wins are specific enough that they rarely justify choosing it over the w7-3555 for general-purpose server or workstation use.

Specification Differences

The two processors differ in nearly every major specification category. The w7-3555 has 28 cores and 56 threads, while the 6520P has 24 cores and 48 threads, a 4-core and 8-thread difference. Clock speeds also favor the w7-3555: its base clock is 2.70 GHz versus 2.40 GHz, and its boost clock is 4.80 GHz versus 4.00 GHz. The w7-3555's thermal design power is 325 W, compared to 210 W for the 6520P.

The sockets differ entirely: the w7-3555 uses Intel Socket 4677, while the 6520P uses Intel Socket 4710. Memory bandwidth shows a significant gap: the w7-3555 offers 307.2 GB/s, while the 6520P delivers 409.6 GB/s, a 33% advantage for the 6520P despite its lower core count. Both support DDR5 memory with eight-channel buses and ECC, but the 6520P's higher bandwidth could benefit memory-intensive workloads.

PCIe lane counts also differ: the w7-3555 provides 112 Gen 5 lanes (CPU only), while the 6520P provides 88 Gen 5 lanes. The launch MSRP for the w7-3555 is $2339, and for the 6520P it is $1295. The release dates are months apart: the w7-3555 launched on 2024-08-23, and the 6520P launched on 2025-02-23.

Architecture Differences

The architectural divide is substantial. The w7-3555 is based on Sapphire Rapids, part of the Xeon W generation, while the 6520P uses Granite Rapids, part of the Xeon 6 (Granite Rapids-SP) generation. The process nodes differ: the w7-3555 uses Intel's 10 nm process, while the 6520P uses a 5 nm node. This explains the die size disparity: the w7-3555 has a 4x 477 mm² configuration, while the 6520P has a single 598 mm² die.

Cache hierarchies show important differences. The w7-3555 has 80 KB of L1 per core, 2 MB of L2 per core, and 75 MB of L3 cache. The 6520P has 112 KB of L1 per core, 2 MB of L2 per core, and 144 MB of shared L3 cache. The 6520P's larger L3 (144 MB versus 75 MB) and per-core L1 (112 KB versus 80 KB) likely contribute to its wins in physics and prime number tests, as larger caches reduce memory latency for certain access patterns.

Both are built by Intel, support DDR5 with ECC, and have no integrated graphics. Both are active production parts, but their part numbers differ (SRN75 versus SRVNQ). Neither has an unlocked multiplier.

The Verdict

The data points to a clear split in intended use cases. The Intel Xeon w7-3555 is the superior processor for rendering, content creation, scientific computing, and general workstation tasks. Its consistent 7.7% lead across Cinebench, 14-20% leads in Passmark compute workloads, and higher average benchmark score (106192 versus 93786) make it the stronger choice for users who prioritize raw compute throughput across a wide range of applications.

The Intel Xeon 6520P, despite its lower core count and clock speeds, demonstrates architectural efficiency that wins in specific niches. Its 24.3% lead in prime number finding and 19.5% lead in physics suggest workloads involving number theory, cryptography, or simulation physics would run noticeably faster. Its 409.6 GB/s memory bandwidth, 33% higher than the w7-3555, could also benefit memory-bound workloads despite the lower core count.

However, the w7-3555's 15-win majority, higher percentile ranking (97th versus 96th), and larger core/thread count (28/56 versus 24/48) indicate it is the more versatile processor. Users with specialized physics or number-crunching workloads should consider the 6520P, but for all other applications, the recorded data favors the w7-3555.