Intel Xeon 6520P vs Intel Xeon w7-2575X Comparison

The Intel Xeon 6520P and Intel Xeon w7-2575X are both active, high-end server and workstation processors, but the data shows they are built for different priorities. The 6520P is a newer, denser part that wins the vast majority of benchmark comparisons, while the w7-2575X holds onto a couple of specific mathematical workloads. This analysis breaks down the recorded performance data, architectural differences, and practical use cases for each chip.

Head-to-Head Benchmarks

The benchmark results show a decisive overall victory for the Intel Xeon 6520P, which wins 15 of the 17 recorded head-to-head tests. The most striking pattern is consistency: across all six Cinebench tests (R15, R20, and R23, both single-core and multi-core), the 6520P leads by exactly 20.8%. For example, in Cinebench R23 multi-core, the 6520P scores 53,495 against the w7-2575X's 44,277. The same 20.8% delta appears in single-core R23, with scores of 7,552 and 6,250 respectively. This uniform margin suggests a fundamental architectural advantage rather than a workload-specific quirk.

The Passmark suite tells a more nuanced story. The 6520P's biggest win is in the physics test, where it scores 7,209 against 2,222 for the w7-2575X, a massive 224.4% difference. That is the single largest gap between the two processors. Prime number finding is also heavily lopsided: 526 for the 6520P versus 218 for the w7-2575X, a 141.3% advantage. Data compression (841,518 vs 789,817, up 6.5%) and random string sorting (95,736 vs 77,986, up 22.8%) also favor the 6520P. Data encryption shows a 15% lead for the 6520P, with scores of 45,188 versus 39,295.

However, the w7-2575X fights back in two specific Passmark sub-tests. It wins floating point math with a score of 171,427 versus 162,862, a 5% margin in its favor. It also takes integer math at 219,924 against 214,288, a 2.6% edge. These are the only two tests where the w7-2575X comes out ahead. Meanwhile, the multi-thread Passmark score follows the Cinebench pattern: the 6520P leads 62,936 to 52,091, again a 20.8% difference. Single-thread Passmark is nearly a tie, with the 6520P at 3,356 and the w7-2575X at 3,300, just a 1.7% lead for the newer chip.

The average benchmark scores confirm the hierarchy. The 6520P posts an average score of 93,786, while the w7-2575X averages 88,172. Relative to other CPUs in the database, both sit at the 96th percentile, so they are both top-tier parts, but the 6520P clearly has more aggregate performance.

Architecture Differences

The architectural split explains nearly all of the performance gaps. The Intel Xeon 6520P is built on Granite Rapids, part of the Xeon 6 generation, and uses a 5 nm process node. In contrast, the Intel Xeon w7-2575X uses the older Sapphire Rapids architecture from the Xeon W generation, fabricated on a 10 nm node. This process difference (5 nm versus 10 nm) is a primary driver of the 6520P's efficiency and performance density.

Core counts also differ. The 6520P has 24 cores and 48 threads, while the w7-2575X has 22 cores and 44 threads. That is two fewer cores and four fewer threads on the older chip. Cache configurations are dramatically different. The 6520P features a massive 144 MB shared L3 cache, while the w7-2575X has only 45 MB of L3. Per-core L1 cache also differs: 112 KB per core on the 6520P versus 80 KB per core on the w7-2575X. Both share the same 2 MB per core L2 cache size.

Clock speeds are the one area where the w7-2575X has a clear specification advantage. Its base clock is 3.00 GHz and boost clock is 4.80 GHz, compared to the 6520P's 2.40 GHz base and 4.00 GHz boost. The w7-2575X also has an unlocked multiplier, meaning it can be overclocked, while the 6520P is locked. Yet despite the higher clocks, the w7-2575X still loses in every Cinebench test, which points to the 6520P's superior instructions-per-clock and wider memory subsystem.

Memory and I/O are also heavily skewed. The 6520P supports eight-channel DDR5 memory with a bandwidth of 409.6 GB/s, while the w7-2575X uses quad-channel DDR5 with 153.6 GB/s bandwidth. That is a 2.67x bandwidth advantage for the 6520P, which explains its dominance in memory-sensitive workloads like compression and sorting. PCIe lanes differ as well: the 6520P offers 88 Gen 5 lanes, while the w7-2575X offers 64 Gen 5 lanes. Sockets are incompatible, with the 6520P using Intel Socket 4710 and the w7-2575X using Intel Socket 4677.

Power draw moves in the opposite direction. The w7-2575X has a 250 W TDP, while the 6520P is rated at 210 W, so the newer chip delivers more performance at a lower rated power. The 6520P also has a larger die size at 598 mm², though no die size is recorded for the w7-2575X. Both chips support DDR5 and ECC memory, and neither has integrated graphics.

The Verdict

The data points to a clear choice for most buyers: the Intel Xeon 6520P is the stronger processor. It wins 15 out of 17 benchmarks, including every Cinebench test with a uniform 20.8% margin. Its multi-thread score in Passmark (62,936) is 20.8% higher than the w7-2575X's 52,091, and its physics test result is more than triple the older chip's score. The 6520P's 144 MB L3 cache and eight-channel memory bandwidth (409.6 GB/s) make it the better option for data-heavy server workloads. It also does all this with a lower TDP (210 W versus 250 W) and a lower launch MSRP of $1295 compared to $1689 for the w7-2575X.

The Intel Xeon w7-2575X is only the right pick for a narrow set of use cases. It wins floating point math by 5% and integer math by 2.6%, so if a workload is purely dominated by those specific operations, it holds a small edge. Its higher boost clock (4.80 GHz versus 4.00 GHz) and unlocked multiplier make it more attractive for overclocking, but the benchmark data shows that even with those advantages, it cannot match the 6520P in any Cinebench test. The w7-2575X is also the older part, released in August 2024 versus February 2025 for the 6520P.

For a general-purpose workstation or server CPU, the 6520P is the superior choice. Its 20.8% lead across all rendering and multi-thread tests, combined with a 22.8% win in random string sorting and a 15% win in encryption, makes it the more versatile and future-proof option. The w7-2575X should only be considered if the specific workload is dominated by floating point or integer math, and even then, the margin is small enough that other system factors might matter more.

FAQ

Q: Which processor is faster in multi-core rendering?

A: The Intel Xeon 6520P is faster. In Cinebench R23 multi-core, it scores 53,495 versus 44,277 for the w7-2575X, a 20.8% lead. The same 20.8% margin appears in Cinebench R15 and R20 multi-core tests.

Q: Is the Intel Xeon w7-2575X better at anything?

A: Yes, it wins two Passmark sub-tests. It scores 171,427 in floating point math versus 162,862 for the 6520P (a 5% edge), and 219,924 in integer math versus 214,288 (a 2.6% edge).

Q: How do the core counts compare?

A: The 6520P has 24 cores and 48 threads, while the w7-2575X has 22 cores and 44 threads. The 6520P has two more cores and four more threads.

Q: What is the cache size difference?

A: The 6520P has 144 MB of shared L3 cache, while the w7-2575X has 45 MB. Per-core L1 is also larger on the 6520P: 112 KB versus 80 KB. L2 cache is the same at 2 MB per core.

Q: Which CPU has higher clock speeds?

A: The w7-2575X has higher clocks: a 3.00 GHz base and 4.80 GHz boost, compared to the 6520P's 2.40 GHz base and 4.00 GHz boost. The w7-2575X also has an unlocked multiplier.

Q: Do they use the same memory configuration?

A: No. The 6520P supports eight-channel DDR5 with 409.6 GB/s bandwidth, while the w7-2575X uses quad-channel DDR5 with 153.6 GB/s bandwidth. Both support ECC memory.

Where Each One Wins

The Intel Xeon 6520P wins in almost every category measured. Its 20.8% advantage spans all Cinebench multi-core and single-core tests, meaning it is faster in both threaded rendering and lightly threaded tasks. The Passmark data shows it dominates in physics simulation (224.4% lead), prime number finding (141.3% lead), random string sorting (22.8% lead), data encryption (15% lead), and data compression (6.5% lead). Its multi-thread Passmark score is also 20.8% higher. These wins point to a CPU that excels in server virtualization, database processing, compression workloads, and any task that can use its 48 threads and large 144 MB L3 cache.

The Intel Xeon w7-2575X wins in two narrow but important niches. Its floating point math score of 171,427 is 5% higher than the 6520P's 162,862, making it the better choice for scientific computing or financial modeling that relies heavily on FPU operations. Its integer math score of 219,924 is 2.6% higher than the 6520P's 214,288, which could matter for certain integer-heavy algorithmic workloads. These are the only two recorded tests where the w7-2575X comes out ahead.

For real-world purchasing decisions, the 6520P is the safer bet for mixed workloads. The w7-2575X is only worthwhile if the system will run almost exclusively floating point or integer math tasks, and even then, the margin is modest. The 6520P's lower TDP (210 W versus 250 W) also makes it easier to cool in dense server chassis.

Specification Differences

The two processors differ on nearly every key specification. The 6520P uses the Granite Rapids architecture on a 5 nm node, while the w7-2575X uses Sapphire Rapids on a 10 nm node. Core counts are 24 versus 22, and thread counts are 48 versus 44. Base clocks are 2.40 GHz versus 3.00 GHz, and boost clocks are 4.00 GHz versus 4.80 GHz. The TDP is 210 W for the 6520P and 250 W for the w7-2575X.

Cache configuration is a major differentiator: the 6520P has 112 KB L1 per core and 144 MB shared L3, while the w7-2575X has 80 KB L1 per core and 45 MB L3. L2 cache is identical at 2 MB per core. Memory support is DDR5 for both, but the 6520P runs eight-channel with 409.6 GB/s bandwidth, while the w7-2575X runs quad-channel with 153.6 GB/s. PCIe generation is the same (Gen 5), but lane counts differ: 88 lanes for the 6520P versus 64 for the w7-2575X. Sockets are different (4710 versus 4677), as are part numbers (SRVNQ versus SRN4D). The multiplier is locked on the 6520P and unlocked on the w7-2575X. Launch dates are February 2025 for the 6520P and August 2024 for the w7-2575X.