AMD Ryzen Threadripper PRO 9975WX vs Intel Xeon w9-3575X Comparison

Head-to-Head Benchmarks

The benchmark data is decisively in favor of the AMD Ryzen Threadripper PRO 9975WX, which claims 15 of the 16 recorded head-to-head tests. The Intel Xeon w9-3575X manages only a single win. The margin is often substantial, not marginal.

Starting with the Cinebench suite, the AMD part is remarkably consistent. In Cinebench R23 multi-core, the Threadripper PRO 9975WX scores 93,553 against the Xeon's 70,837, a 32.1% advantage. That same 32.1% delta repeats in Cinebench R15 multi-core (9,430 versus 7,140) and Cinebench R20 multi-core (39,292 versus 29,751). Single-core results tell the same story: the AMD chip leads by 32% in R15 (1,331 versus 1,008) and R20 (5,546 versus 4,200). The consistency of that roughly 32% gap across all three Cinebench versions indicates a fundamental architectural edge rather than a workload-specific quirk.

The PassMark results reinforce the pattern, though with more variation. The largest single delta is in integer math, where the Threadripper PRO 9975WX posts 461,724 against 298,224 for the Xeon, a 54.8% lead. Random string sorting shows a 39.6% gap (188,014 versus 134,723), and data encryption is 36.6% ahead (85,035 versus 62,258). Data compression follows at 34.8% (1,644,573 versus 1,219,584). The other PassMark tests are closer but still favor AMD: multithread is 25.9% ahead (104,902 versus 83,338), extended instructions are 25.4% ahead (137,733 versus 109,843), single-thread is 20% ahead (4,408 versus 3,672), floating-point math is 11.5% ahead (304,833 versus 273,398), and physics is 6.6% ahead (7,288 versus 6,836).

The Xeon's only victory comes in PassMark find prime numbers, scoring 687 against 620, a 9.8% edge for Intel. That is a narrow, isolated result. In this specific mathematical workload, the Intel part demonstrates a real but limited advantage. Across every other measured category, the AMD processor holds the lead, often by wide margins.

Architecture Differences

The two processors take fundamentally different design approaches. The AMD Ryzen Threadripper PRO 9975WX is built on the Zen 5 architecture, codenamed Shimada Peak, using a 4 nm process from TSMC. The Intel Xeon w9-3575X uses Sapphire Rapids silicon on Intel's 10 nm process. The process node difference alone explains much of the efficiency and clock behavior seen in the benchmarks.

Core counts differ significantly. The AMD chip packs 32 cores and 64 threads, while the Intel part offers 44 cores and 88 threads. Despite having 12 fewer cores, the AMD processor wins the vast majority of multi-threaded tests. This points to a substantial per-core performance advantage for Zen 5. The AMD chip boosts to 5.40 GHz compared to 4.80 GHz for the Xeon, and its base clock is 4.00 GHz versus 2.20 GHz. Higher clocks on fewer cores, combined with a more efficient architecture, allow the Threadripper to outpace the higher-core-count Xeon.

Cache configurations also differ. The AMD part has 64 KB of L1 per core, 1 MB of L2 per core, and 128 MB of L3 cache. The Intel part has 80 KB of L1 per core, 2 MB of L2 per core, but only 97.5 MB of L3. The AMD processor's larger L3 pool likely contributes to its strong performance in data-heavy workloads like compression and encryption.

The physical implementation is notably different. The AMD chip uses four chiplets, each 70.6 mm², totaling 33,260 million transistors. The Intel part uses four dies of 477 mm² each. The smaller, denser AMD chiplets are a direct result of the more advanced 4 nm process. Both platforms support DDR5 memory with eight-channel buses, but the AMD processor has a higher theoretical memory bandwidth of 409.6 GB/s versus 307.2 GB/s for Intel. PCIe connectivity also favors AMD: 128 Gen 5 lanes (CPU only) against Intel's 112 Gen 5 lanes.

Both processors support ECC memory, have no integrated graphics, target the server and workstation segment, and are currently in active production. Both also have unlocked multipliers.

Where Each One Wins

The AMD Ryzen Threadripper PRO 9975WX is the clear choice for most professional workloads. Its 54.8% lead in integer math makes it particularly strong for compilation, rendering, and general computation tasks. The 36.6% edge in data encryption and 34.8% advantage in data compression suggest excellent performance in database, file-server, and security-related workloads. The 39.6% lead in random string sorting points to strong performance in text processing and data manipulation tasks.

The 32.1% multi-core Cinebench advantage indicates that the AMD part is better suited for 3D rendering, video encoding, and other heavily threaded creative workloads. Its 20% single-thread lead means even lightly threaded applications, such as legacy software or certain CAD tools, will run noticeably faster on the AMD platform. The 25.9% multithread PassMark score reinforces its general-purpose multi-core superiority.

The Intel Xeon w9-3575X has a narrower set of advantages. Its 9.8% win in find prime numbers is the only benchmark where it leads. That test is a proxy for certain types of mathematical and scientific computation, particularly those involving prime-number generation or related number theory. Workloads that specifically stress this pattern, rather than general floating-point or integer math, may see a benefit from the Intel part. Its higher core count of 44 versus 32 also suggests it could handle certain embarrassingly parallel tasks with high thread counts, though the benchmark data does not show this translating into a win in any of the recorded tests.

For everything else measured, the AMD chip is faster, often by a wide margin.

Specification Differences

The two processors differ across nearly every major specification. The AMD Ryzen Threadripper PRO 9975WX has 32 cores and 64 threads, while the Intel Xeon w9-3575X has 44 cores and 88 threads. Base clocks are 4.00 GHz for AMD and 2.20 GHz for Intel. Boost clocks are 5.40 GHz and 4.80 GHz respectively. TDP is 350 watts for AMD and 340 watts for Intel, a negligible difference given the performance gap.

The AMD part uses the 4 nm process from TSMC, while Intel uses its 10 nm process. The AMD chip has 33,260 million transistors across four 70.6 mm² chiplets. The Intel die size is listed as 4x 477 mm². Cache configurations differ in every level: AMD has 64 KB L1 per core and 1 MB L2 per core versus Intel's 80 KB L1 and 2 MB L2. L3 cache is 128 MB on AMD versus 97.5 MB on Intel.

Memory bandwidth is higher on AMD at 409.6 GB/s versus 307.2 GB/s, both over eight-channel DDR5. PCIe lanes are 128 Gen 5 on AMD versus 112 Gen 5 on Intel. The AMD part uses Socket sTR5, while Intel uses Socket 4677. The AMD launch MSRP is $4099, and the Intel launch MSRP is $3789. The AMD processor launched in July 2025, while the Intel processor launched in August 2024. The AMD part number is 100-000000723; the Intel part number is SRN72.

FAQ

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

A: The AMD Ryzen Threadripper PRO 9975WX leads by 32.1% in Cinebench R23 multi-core, scoring 93,553 versus 70,837 for the Intel Xeon w9-3575X. The same 32.1% margin appears in Cinebench R15 and R20 multi-core tests.

Q: Does the Intel Xeon w9-3575X win any benchmark at all?

A: Yes. The Intel part wins PassMark find prime numbers with a score of 687 versus 620 for AMD, a 9.8% advantage. It loses the other 15 head-to-head tests.

Q: How do the core counts compare?

A: The Intel Xeon w9-3575X has 44 cores and 88 threads, while the AMD Ryzen Threadripper PRO 9975WX has 32 cores and 64 threads. Despite fewer cores, the AMD part wins most multi-threaded benchmarks.

Q: Which processor has higher memory bandwidth?

A: The AMD Ryzen Threadripper PRO 9975WX has 409.6 GB/s of memory bandwidth, compared to 307.2 GB/s for the Intel Xeon w9-3575X. Both use eight-channel DDR5 memory.

Q: What is the single-thread performance difference?

A: The AMD processor scores 4,408 in PassMark single-thread, a 20% lead over the Intel part's 3,672. In Cinebench R23 single-core, AMD scores 13,207 against Intel's 7,083, though that specific comparison is not in the head-to-head data. The recorded head-to-head single-core tests show a 32% AMD advantage in Cinebench R15 and R20.

Q: Which processor offers more PCIe lanes?

A: The AMD Ryzen Threadripper PRO 9975WX provides 128 Gen 5 lanes (CPU only), while the Intel Xeon w9-3575X provides 112 Gen 5 lanes.

The Verdict

The benchmark data is unambiguous. The AMD Ryzen Threadripper PRO 9975WX is the faster processor in nearly every measured workload, often by margins of 25% to 55%. Its wins in Cinebench multi-core, integer math, data compression, encryption, and single-thread performance make it the stronger all-around choice for workstation and server applications. The Intel Xeon w9-3575X offers more cores and threads on paper, but the AMD part's architectural efficiency and higher clocks translate that into actual performance where it matters.

The Intel processor's only meaningful niche is the find prime numbers workload, where it holds a 9.8% edge. For professionals running that specific type of computation, the Xeon has a reason to exist. For everyone else, the AMD part delivers a 32% lead across the Cinebench suite, a 54.8% lead in integer math, and a 20% lead in single-thread performance. The AMD processor also offers higher memory bandwidth and more PCIe lanes, which can matter in memory-heavy or expansion-heavy systems.

Buyers should consider the Intel Xeon w9-3575X if their workload is dominated by prime-number-style mathematical operations. Otherwise, the AMD Ryzen Threadripper PRO 9975WX is the faster processor across the recorded benchmarks, and its advantages are consistent enough to make it the default recommendation for most workstation builds. Both processors sit at the 98th percentile of all CPUs in the database, but the AMD part's average benchmark score of 182,700 versus 144,323 for the Intel part shows a substantial overall performance gap.