AMD Ryzen Threadripper PRO 5975WX vs Intel Xeon 6521P Comparison

Head-to-Head Benchmarks

The direct comparison between the AMD Ryzen Threadripper PRO 5975WX and the Intel Xeon 6521P is strikingly one-sided. Across 17 recorded head-to-head benchmark runs, the AMD part wins 15, while the Intel Xeon takes only 2. The average benchmark score for the AMD processor is 124,171, while the Intel Xeon averages 105,845, a gap of roughly 17% in favor of the Threadripper PRO. Both CPUs sit at the 97th percentile in the database, indicating they are both high-end workstation or server parts, but the data consistently places the AMD chip ahead in most measured workloads.

In Cinebench tests, the AMD Ryzen Threadripper PRO 5975WX leads by a nearly uniform margin. In Cinebench R15 multicore, it scores 6453 versus 5711 for the Xeon, a 13% advantage. The single-core R15 result is 910 versus 806, also a 12.9% lead. Moving to Cinebench R20, the multicore score is 26888 against 23796, again a 13% edge, and the single-core score is 3795 versus 3359, another 13% win. Cinebench R23 multicore shows 64021 for AMD and 56658 for Intel, a 13% difference, with the single-core result at 9038 versus 7998, also 13% ahead. These consistent deltas across all six Cinebench variants point to a steady performance advantage in both lightly threaded and fully threaded rendering workloads.

The Passmark suite reveals even larger margins in several compute-heavy categories. In data encryption, the AMD part scores 80453 versus 51221, a massive 57.1% lead. Integer math is another standout: 360156 for AMD versus 246263 for Intel, a 46.2% advantage. Data compression shows a 33.7% gap, with AMD at 1293784 and Intel at 967721. Floating point math favors AMD by 13.2% (202363 vs 178828), extended instructions by 13.8% (82850 vs 72820), and random string sorting by 18.2% (123527 vs 104517). The Passmark multithread score is 75319 for AMD versus 66657 for Intel, a 13% lead. Single-thread performance is much closer: 3323 versus 3238, a 2.6% edge for AMD.

The Intel Xeon 6521P wins the two remaining tests, and both are notable for their specific nature. In Passmark find prime numbers, the Intel part scores 560 versus 438 for AMD, meaning Intel is ahead by 21.8% (the delta is reported as -21.8% from the AMD perspective). In Passmark physics, Intel scores 5972 versus 4360, a 27% lead. These are the only two areas where the Xeon 6521P outpaces the Threadripper PRO, and they suggest a different optimization profile for certain integer loops and physics calculations.

It is also worth examining the nearest rival context. The AMD Ryzen Threadripper PRO 5975WX sits between the AMD EPYC 7642 (average score 124006, delta 0.1%) and the Intel Xeon 6730P (average score 124756, delta -0.5%), with the AMD EPYC 9354 slightly further ahead at 126810 (delta -2.1%) and the AMD EPYC 9384X behind at 120427 (delta 3.1%). The Intel Xeon 6521P, meanwhile, is compared against the Intel Xeon w7-3555 (average 106192, delta -0.3%), the AMD Ryzen 9 9850HX (average 106413, delta -0.5%), the AMD EPYC 8324P (average 103329, delta 2.4%), and the Intel Xeon w7-2595X (average 108663, delta -2.6%). This shows that the Xeon 6521P's average score of 105845 is in line with its immediate rivals, but it is clearly below the Threadripper PRO's score in the same database.

The Verdict

Based strictly on the recorded benchmark data, the AMD Ryzen Threadripper PRO 5975WX is the more capable processor for the vast majority of workloads. It wins 15 of 17 direct comparisons, with particularly decisive victories in data encryption, integer math, data compression, and all Cinebench multithreaded tests. The 57.1% lead in encryption and 46.2% lead in integer math are not marginal differences; they represent substantial throughput advantages for tasks that rely on those operations. For any application that is multi-threaded, rendering-heavy, or performs data compression or encryption, the data points clearly to the AMD part.

The Intel Xeon 6521P is not without merit. Its wins in prime number finding (21.8% ahead) and physics (27% ahead) show that certain workloads, especially those involving prime calculations or physics simulations, can run faster on the Intel chip. However, these are narrow niches within the broader benchmark set. The Xeon also has a lower TDP at 225 watts versus 280 watts for the AMD part, which may matter for power-constrained deployments, but the performance trade-off is steep.

For a user whose primary tasks are rendering, compiling, data encryption, or general multithreaded compute, the AMD Ryzen Threadripper PRO 5975WX is the clear choice from the data. For workloads specifically centered on prime number calculations or physics simulations, the Intel Xeon 6521P offers a measurable advantage. The single-thread difference is small (2.6%), so day-to-day responsiveness is unlikely to be a deciding factor. Overall, the database favors AMD in nearly every category that dominates professional workstation use.

Architecture Differences

The two processors come from different architectural generations and process technologies. The AMD Ryzen Threadripper PRO 5975WX is built on the Zen 3 architecture, codenamed Chagall PRO, and manufactured on a 7 nm process at TSMC. It contains 16,600 million transistors across a die size listed as 4x 81 mm². The Intel Xeon 6521P uses the Granite Rapids architecture (Granite Rapids-SP generation) on a 5 nm process at Intel, with a die size of 598 mm². The process node difference (7 nm versus 5 nm) is notable, but the overall performance picture is dominated by core count and cache configuration.

Core and thread counts differ significantly. The AMD part has 32 cores and 64 threads, while the Intel part has 24 cores and 48 threads. This 33% core advantage for AMD is a major factor in its multithreaded wins, though the Intel part still manages to win in two specific tests. Clock speeds also favor AMD: the base clock is 3.60 GHz versus 2.60 GHz for Intel, and the boost clock is 4.50 GHz versus 4.10 GHz. Higher clocks plus more cores explain the broad performance lead in most benchmarks.

Cache hierarchies are structured differently. The AMD chip has 64 KB of L1 cache per core, 512 KB of L2 per core, and a large 128 MB L3 cache. The Intel chip has 112 KB of L1 per core, 2 MB of L2 per core, and 144 MB of shared L3 cache. The Intel part has more L3 cache in total (144 MB vs 128 MB) and much larger per-core L2 (2 MB vs 512 KB), but this does not translate into overall benchmark superiority.

Memory support also differs. The AMD part uses DDR4 memory with an eight-channel bus and a memory bandwidth of 204.8 GB/s. The Intel part uses DDR5 memory, also with an eight-channel bus, but with double the memory bandwidth at 409.6 GB/s. Both support ECC memory. The higher bandwidth of the Intel part is a clear architectural advantage, yet in the recorded benchmarks it does not overcome AMD's core and clock advantages. The PCIe interface differs as well: AMD offers Gen 4 with 128 lanes (CPU only), while Intel offers Gen 5 with 136 lanes (CPU only). The Intel part has more lanes and a newer PCIe generation, which could matter for expansion-heavy systems.

Both processors are unlocked for multiplier adjustment? No, both have multiplierUnlocked set to false. Both are active production parts. The AMD part was released on 2022-03-07, while the Intel part was released on 2025-02-23, making the Xeon a much newer design. The launch MSRP for the AMD part is $3299, and for the Intel part it is $1250. The AMD part targets the server/workstation segment, as does the Intel part, and neither has integrated graphics (Intel lists "N/A" for integrated graphics; AMD has null).

FAQ

Q: Which CPU has more cores and threads?

A: The AMD Ryzen Threadripper PRO 5975WX has 32 cores and 64 threads, while the Intel Xeon 6521P has 24 cores and 48 threads.

Q: Which processor is faster in Cinebench R23 multicore?

A: The AMD Ryzen Threadripper PRO 5975WX scores 64021 versus 56658 for the Intel Xeon 6521P, a 13% advantage for AMD.

Q: Does the Intel Xeon 6521P win any benchmarks?

A: Yes, it wins Passmark find prime numbers (560 vs 438, a 21.8% lead) and Passmark physics (5972 vs 4360, a 27% lead).

Q: What is the memory bandwidth difference?

A: The Intel Xeon 6521P has a memory bandwidth of 409.6 GB/s with DDR5, while the AMD Ryzen Threadripper PRO 5975WX has 204.8 GB/s with DDR4. Both use an eight-channel memory bus.

Q: How do the clock speeds compare?

A: The AMD part has a base clock of 3.60 GHz and a boost clock of 4.50 GHz. The Intel part has a base clock of 2.60 GHz and a boost clock of 4.10 GHz.

Q: What are the process nodes for each CPU?

A: The AMD Ryzen Threadripper PRO 5975WX is built on a 7 nm process at TSMC, while the Intel Xeon 6521P is built on a 5 nm process at Intel.

Where Each One Wins

The AMD Ryzen Threadripper PRO 5975WX wins in every Cinebench test, all six of them, with a uniform 13% lead in both single-core and multicore versions. This makes it the preferred choice for rendering, video encoding, and any workload that relies heavily on CPU rendering engines. The data compression win (33.7% ahead) points to advantages in archival, database compression, and file-server workloads. The huge encryption win (57.1%) is significant for security appliances, VPN gateways, or any environment doing heavy TLS or disk encryption. Integer math (46.2% ahead) and floating point math (13.2% ahead) cover a broad swath of scientific and engineering computations, making the AMD part the better all-around compute engine.

The Intel Xeon 6521P wins in two specific areas. Passmark find prime numbers (560 vs 438) suggests an edge in certain integer-heavy loops, possibly relevant for cryptography-related prime generation or number theory simulations. Passmark physics (5972 vs 4360) indicates better performance in physics simulation workloads, which could matter for finite element analysis, fluid dynamics, or game physics servers. These are real wins, but they are narrow. For any user whose primary workload is one of those two categories, the Intel part is the data-backed choice. For everything else, the AMD Ryzen Threadripper PRO 5975WX offers superior benchmark results across a much wider range of applications.

The single-thread difference is small (2.6% for AMD), so neither CPU has a meaningful edge in lightly threaded tasks. The Intel part's higher memory bandwidth (409.6 GB/s vs 204.8 GB/s) and newer PCIe Gen 5 with 136 lanes could benefit memory-bandwidth-bound or expansion-heavy systems, but the recorded benchmarks do not show a performance payoff in the tested workloads. Ultimately, the AMD part wins the majority of compute scenarios, while the Intel part is the better fit only for prime-number and physics-specific tasks.