AMD Ryzen Threadripper PRO 5965WX vs Intel Xeon 6521P Comparison

The Intel Xeon 6521P and AMD Ryzen Threadripper PRO 5965WX are both 24-core, 48-thread workstation processors, but they approach the workload from opposite ends of the architectural spectrum. The Xeon 6521P is a 2025 Granite Rapids part built on Intel’s 5 nm process, while the Threadripper PRO 5965WX is a 2022 Zen 3 design from TSMC’s 7 nm node. Benchmark results show a near-total dead heat in most multi-core rendering tests, but significant divergence in specialty workloads. The Xeon wins 12 of the 17 head-to-head tests, yet the AMD chip takes the largest single victory margin. This analysis breaks down where each processor dominates and which buyer should choose which.

Head-to-Head Benchmarks

The most striking pattern in the data is how close the two CPUs are in Cinebench multi-core tests. The Xeon 6521P edges out the Threadripper in all three Cinebench multi-core runs: 5711 vs 5685 in R15 (0.5% delta), 23796 vs 23688 in R20 (0.5% delta), and 56658 vs 56400 in R23 (0.5% delta). The single-core Cinebench results are similarly tight, with the Xeon taking R15 at 806 vs 802, R20 at 3359 vs 3344, and R23 at 7998 vs 7962 — all within 0.5%. This suggests that for pure CPU rendering throughput, the two are effectively interchangeable.

The Passmark suite tells a different story. The Xeon 6521P delivers its most decisive win in Passmark Physics, scoring 5972 versus the Threadripper’s 4251 — a massive 40.5% advantage. That is the largest delta in the entire head-to-head set. The Xeon also leads in floating-point math (178828 vs 157708, 13.4% ahead), extended instructions (72820 vs 67300, 8.2% ahead), and find prime numbers (560 vs 523, 7.1% ahead). Random string sorting goes to Intel as well: 104517 vs 99287, a 5.3% margin.

The AMD Ryzen Threadripper PRO 5965WX counters with its own specialty wins. The biggest is data encryption, where it scores 63113 versus the Xeon’s 51221 — an 18.8% advantage. That is the second-largest margin in the comparison. The Threadripper also wins integer math by 12.4% (281247 vs 246263) and data compression by 4.2% (1010067 vs 967721). In single-thread Passmark, AMD takes a 3% lead: 3337 vs 3238. The multithread Passmark score goes narrowly to Intel (66657 vs 66353, 0.5% delta), mirroring the Cinebench multi-core results.

The overall average benchmark scores reflect the split: the Xeon 6521P posts an average score of 105845, while the Threadripper PRO 5965WX averages 98504. That is a difference of roughly 7.5% in the Xeon’s favor, driven primarily by its dominance in physics, floating-point, and extended-instruction workloads. Both chips sit in the 97th percentile of all CPUs, meaning either is a top-tier performer, but the Xeon’s aggregate score places it slightly higher in the overall ranking.

Where Each One Wins

The Intel Xeon 6521P is the clear choice for workloads that stress floating-point arithmetic and physics simulation. Its 13.4% lead in Passmark floating-point math and 40.5% lead in physics indicate strong SIMD execution and cache behavior. The 8.2% advantage in extended instructions further reinforces this, suggesting the Xeon handles newer, more complex instruction sets with greater efficiency. For scientific computing, engineering simulation, or any task that relies heavily on double-precision math, the Xeon’s benchmark profile is compelling.

The AMD Ryzen Threadripper PRO 5965WX wins where integer throughput and data manipulation are paramount. Its 18.8% lead in data encryption and 12.4% lead in integer math are significant margins that translate directly into faster cryptographic operations, compression tasks, and general integer-heavy code. The 4.2% edge in data compression means file archiving and database workloads will favor AMD. The Threadripper also holds a modest 3% lead in single-thread Passmark, which could matter for lightly-threaded legacy applications.

The rendering and multithreaded tests are a wash. Cinebench R15, R20, and R23 multi-core scores all land within 0.5% of each other, as does Passmark multithread (66657 vs 66353, 0.5% delta). For video rendering, 3D model compilation, or any other fully-threaded CPU workload, neither chip has a meaningful advantage. The Xeon’s 5.3% lead in random string sorting does give it a slight edge in certain text-processing or sorting-heavy tasks, but this is a narrow win relative to the AMD chip’s larger margins in its strong areas.

The Verdict

From the benchmark data alone, the Intel Xeon 6521P is the better all-round processor. It wins 12 of 17 head-to-head tests, holds a higher average benchmark score (105845 vs 98504), and delivers a dominant 40.5% win in physics. If your work involves floating-point math, simulation, or extended instruction sets, the Xeon’s 13.4% and 8.2% leads respectively make it the data-backed choice. Its 0.5% margins in all Cinebench multi-core tests mean you sacrifice nothing in rendering performance.

The AMD Ryzen Threadripper PRO 5965WX is the pick if your workload is dominated by integer operations, encryption, or compression. The 18.8% encryption lead and 12.4% integer math lead are not trivial — they represent substantial real-world speedups for database encryption, hashing, and compression pipelines. The 3% single-thread Passmark win also gives AMD a slight edge in single-threaded responsiveness. However, the Threadripper’s 40.5% deficit in physics and 13.4% deficit in floating-point math are hard to ignore for technical computing.

The data supports the Xeon 6521P for most users. It matches the Threadripper in rendering, beats it in the majority of specialty tests, and posts a higher aggregate score. The Threadripper PRO 5965WX is only preferable for a narrow band of integer-heavy and encryption-focused workloads. For a general-purpose workstation CPU, the Xeon’s broader benchmark wins and higher average score make it the safer choice.

FAQ

Q: Which CPU has a higher average benchmark score?

A: The Intel Xeon 6521P has an average benchmark score of 105845, compared to the AMD Ryzen Threadripper PRO 5965WX’s 98504.

Q: How large is the Xeon’s advantage in physics workloads?

A: The Xeon 6521P scores 5972 in Passmark Physics versus the Threadripper’s 4251, a 40.5% lead.

Q: Does the Threadripper win any test by a large margin?

A: Yes, the Threadripper PRO 5965WX leads by 18.8% in data encryption (63113 vs 51221) and by 12.4% in integer math (281247 vs 246263).

Q: Are the multi-core rendering scores similar?

A: Yes, in Cinebench R23 multi-core, the Xeon scores 56658 and the Threadripper scores 56400, a 0.5% delta. R15 and R20 multi-core are also within 0.5%.

Q: Which CPU has a higher single-thread Passmark score?

A: The AMD Ryzen Threadripper PRO 5965WX scores 3337 versus the Xeon’s 3238, a 3% advantage for AMD.

Q: How many head-to-head tests does each CPU win?

A: The Intel Xeon 6521P wins 12 tests, while the AMD Ryzen Threadripper PRO 5965WX wins 5 tests.

Architecture Differences

The two CPUs are built on fundamentally different process nodes and designs. The Intel Xeon 6521P uses a 5 nm process fabricated by Intel, with a large 598 mm² die. It is based on the Granite Rapids architecture, which is Xeon 6 generation silicon. The cache hierarchy is distinctive: 112 KB of L1 per core, 2 MB of L2 per core, and a massive 144 MB of shared L3 cache. This large L3 pool likely contributes to the Xeon’s strong floating-point and physics performance.

The AMD Ryzen Threadripper PRO 5965WX uses a 7 nm process from TSMC and is built on the Zen 3 architecture, codenamed Chagall PRO. It consists of four 81 mm² dies, totaling 16,600 million transistors. The cache layout is different: 64 KB of L1 per core, 512 KB of L2 per core, and 128 MB of L3. The smaller per-core L1 and L2 caches, combined with a smaller L3 pool, may explain the Threadripper’s relative weakness in floating-point and physics tests.

Memory support also diverges sharply. The Xeon 6521P supports DDR5 memory over an eight-channel bus, delivering 409.6 GB/s of bandwidth. The Threadripper PRO 5965WX supports DDR4 on an eight-channel bus, with 204.8 GB/s of bandwidth — exactly half of the Xeon’s throughput. This bandwidth difference is likely a major factor in the Xeon’s 13.4% floating-point lead, as those workloads often depend on memory bandwidth.

PCIe connectivity also differs. The Xeon offers Gen 5 with 136 lanes (CPU only), while the Threadripper provides Gen 4 with 128 lanes (CPU only). The Xeon’s newer PCIe generation and additional lanes give it an advantage for multi-GPU or high-speed storage configurations. Neither chip has integrated graphics, and both are locked multipliers, meaning they are not intended for overclocking.

Specification Differences

The core and thread counts are identical: both have 24 cores and 48 threads. The clock speeds differ notably. The Xeon 6521P has a base clock of 2.60 GHz and a boost clock of 4.10 GHz. The Threadripper PRO 5965WX has a higher base clock of 3.80 GHz and a higher boost clock of 4.50 GHz. Despite the clock advantage for AMD, the Xeon still wins most benchmark tests, indicating that IPC and memory bandwidth play a larger role than raw clock speed.

Thermal design power differs as well. The Xeon 6521P has a TDP of 225 watts, while the Threadripper PRO 5965WX has a TDP of 280 watts. The AMD chip draws more power despite being on an older 7 nm node, while the Intel chip on 5 nm is more power-efficient per watt in this comparison. The sockets are incompatible: the Xeon uses Intel Socket 4710, and the Threadripper uses AMD Socket WRX8.

The launch MSRP reflects the positioning: the Intel Xeon 6521P launched at $1250, while the AMD Ryzen Threadripper PRO 5965WX launched at $2399. The Xeon is significantly cheaper at launch, despite having a higher average benchmark score. The release dates also differ, with the Xeon launching on 2025-02-23 and the Threadripper on 2022-03-07. The Xeon’s part number is SRVNS, and the Threadripper’s is 100-000000446. Both are active production parts in the server/workstation market segment, both support ECC memory, and neither has an unlocked multiplier.