AMD EPYC 8534P vs AMD Ryzen Threadripper PRO 3995WX Comparison

The AMD EPYC 8534P and AMD Ryzen Threadripper PRO 3995WX are both 64-core, 128-thread processors, but they target different corners of the market. The EPYC 8534P is a server part on the newer Zen 4c architecture, while the Threadripper PRO 3995WX is a workstation part on the older Zen 2 architecture. Benchmark results show a clear split: the Threadripper wins 14 of 17 head-to-head comparisons, while the EPYC takes three. The average benchmark score for the EPYC is 185,092, placing it in the 98th percentile of all CPUs, while the Threadripper's average score is 171,748, also in the 98th percentile.

Where Each One Wins

The Threadripper PRO 3995WX is the dominant performer in most multithreaded and single-threaded workloads. Its wins are sweeping: it takes every Cinebench test (R15, R20, R23) in both single-core and multi-core variants, with a consistent 14.3% advantage in each. It also wins in PassMark's multithread test, physics simulation, random string sorting, data compression, data encryption, prime number finding, and single-thread tests. This makes it the clear choice for rendering, physics-based simulations, and general workstation tasks that rely on raw core throughput and clock speed.

The EPYC 8534P, by contrast, wins in three specific PassMark categories: extended instructions (6% ahead), floating-point math (4.2% ahead), and integer math (5% ahead). These are compute-heavy workloads that benefit from the newer Zen 4c architecture's instruction set and math pipeline. The data suggests the EPYC is better suited for scientific computing, financial modeling, or any task that heavily exercises vectorized math operations. Its wins are narrower than the Threadripper's, but they are meaningful for specialized HPC-style workloads.

Another key divider is the socket and platform. The EPYC 8534P uses AMD Socket SP6 with 96 PCIe Gen 5 lanes, while the Threadripper PRO 3995WX uses AMD Socket WRX8 with 128 PCIe Gen 4 lanes. The newer PCIe standard on the EPYC offers higher bandwidth per lane, but the Threadripper offers more total lanes. For users with many Gen 4 devices, the Threadripper's lane count is advantageous; for those needing Gen 5 speeds, the EPYC is the enabler.

Architecture Differences

The architectural gap between these two is significant. The EPYC 8534P is built on TSMC's 5 nm process with 35,500 million transistors across four 73 mm² dies, using the Zen 4c architecture (codename Siena). The Threadripper PRO 3995WX is on TSMC's 7 nm process with 30,400 million transistors across eight 74 mm² dies, using the Zen 2 architecture (codename Castle Peak). The newer process node gives the EPYC a transistor density advantage, despite having fewer total transistors.

Cache configurations differ notably. The EPYC offers 64 KB of L1 per core, 1 MB of L2 per core, and 128 MB of shared L3. The Threadripper has the same 64 KB L1 per core, but only 512 KB of L2 per core, and a larger 256 MB of L3. The Threadripper's larger L3 cache is a direct result of having more chiplets (eight versus four), and it likely contributes to its wins in data compression and string sorting, where large working sets benefit from more cache.

Memory support is another major split. The EPYC 8534P uses DDR5 with a six-channel memory bus, delivering 230.4 GB/s of bandwidth. The Threadripper PRO 3995WX uses DDR4 with an eight-channel memory bus, delivering 204.8 GB/s. While the EPYC has higher peak bandwidth, the Threadripper's eight channels can be more effective for certain access patterns. Both support ECC memory. The EPYC also has a higher base clock of 2.30 GHz and boost clock of 3.10 GHz, but the Threadripper runs faster at 2.70 GHz base and 4.20 GHz boost. The Threadripper's higher clocks explain its single-threaded dominance.

The EPYC's TDP is 200 W, while the Threadripper's is 280 W. The Threadripper's higher power draw is the price for its clock speed advantage. The EPYC 8534P launched on 2023-09-17, while the Threadripper PRO 3995WX launched on 2020-07-13, making the EPYC three years newer. The EPYC's launch MSRP is $4950; the Threadripper's is $5489.

Head-to-Head Benchmarks

The most lopsided results come from the Cinebench suite. In Cinebench R23 multi-core, the Threadripper scores 71,338 versus the EPYC's 61,115, a 14.3% gap. The same delta appears in Cinebench R20 multi-core (29,961 vs 25,668) and R15 multi-core (7,190 vs 6,160). Single-core Cinebench results show the identical 14.3% margin, with the Threadripper scoring 10,071 in R23 single-core versus the EPYC's 8,628. This consistency suggests a fundamental clock-speed advantage rather than a workload-specific quirk.

PassMark results show a wider range of margins. The Threadripper's biggest win is in prime number finding, where it scores 566 versus the EPYC's 278, a 50.9% advantage. This is an extreme outlier, indicating that the Zen 2 architecture's integer division and prime-testing routines are far more efficient than Zen 4c's. The Threadripper also wins physics simulation by 33.3% (5,498 vs 3,667) and random string sorting by 31.3% (188,574 vs 129,479). These are large, decisive wins.

The EPYC's wins are smaller but consistent in math-heavy PassMark tests. In extended instructions, it scores 112,860 versus 106,423, a 6% advantage. In floating-point math, it scores 289,443 versus 277,715, a 4.2% win. In integer math, it scores 514,526 versus 490,116, a 5% win. These margins are modest but show that the Zen 4c's math units outperform Zen 2's, even at lower clock speeds. The Threadripper's wins in data compression (1,841,292 vs 1,791,742, a 2.7% margin) and data encryption (124,433 vs 121,728, a 2.2% margin) are close calls.

FAQ

Q: Which CPU has more cores and threads?

A: Both have exactly 64 cores and 128 threads. There is no difference in core count.

Q: What is the biggest benchmark margin between the two?

A: In PassMark's find prime numbers test, the Threadripper PRO 3995WX scores 566 versus the EPYC 8534P's 278, a 50.9% advantage for the Threadripper.

Q: Does the EPYC 8534P win any benchmarks?

A: Yes, it wins three PassMark tests: extended instructions (112,860 vs 106,423), floating-point math (289,443 vs 277,715), and integer math (514,526 vs 490,116).

Q: Which CPU has higher memory bandwidth?

A: The EPYC 8534P has a six-channel DDR5 bus delivering 230.4 GB/s, while the Threadripper PRO 3995WX has an eight-channel DDR4 bus delivering 204.8 GB/s.

Q: What are the clock speed differences?

A: The Threadripper PRO 3995WX has a base clock of 2.70 GHz and boost clock of 4.20 GHz. The EPYC 8534P has a base clock of 2.30 GHz and boost clock of 3.10 GHz.

Q: How many PCIe lanes does each CPU provide?

A: The EPYC 8534P provides 96 PCIe Gen 5 lanes, while the Threadripper PRO 3995WX provides 128 PCIe Gen 4 lanes.

The Verdict

The data points to a clear winner for most users: the AMD Ryzen Threadripper PRO 3995WX. It wins 14 of 17 head-to-head benchmarks, and its wins are often decisive, including a 14.3% margin across all Cinebench tests and a 50.9% margin in prime number finding. Its higher clock speeds (4.20 GHz boost vs 3.10 GHz) and larger L3 cache (256 MB vs 128 MB) give it a broad performance advantage in rendering, physics, compression, and general workstation tasks. For anyone running Cinebench-style workloads or PassMark's multithread suite, the Threadripper is the statistically superior choice.

The AMD EPYC 8534P is the pick for a narrower set of workloads. Its wins in integer math, floating-point math, and extended instructions suggest that Zen 4c's newer architecture handles complex mathematical operations more efficiently, even at lower clocks. Its higher memory bandwidth (230.4 GB/s vs 204.8 GB/s) and PCIe Gen 5 support make it more future-proof for I/O-heavy server tasks. The EPYC also draws less power (200 W TDP vs 280 W), which matters in dense server deployments.

The choice comes down to workload profile. If the priority is maximum performance across a variety of multi-threaded and single-threaded tasks, the Threadripper PRO 3995WX wins on the strength of its benchmark record. If the priority is math-heavy computation, newer memory technology, or PCIe Gen 5 connectivity, the EPYC 8534P's three wins and modern platform features justify its selection. The Threadripper is the better all-rounder; the EPYC is the better specialist.