AMD EPYC 9535 vs AMD EPYC 9634 Comparison

Head-to-Head Benchmarks

The benchmark data reveals a clear split between the AMD EPYC 9535 and the AMD EPYC 9634, with each processor claiming victories in distinct categories. The EPYC 9535, based on the Zen 5 architecture, secures 7 wins out of the 11 recorded head-to-head comparisons, while the EPYC 9634 takes 4.

The most decisive victory for the EPYC 9535 comes in floating point math, where it scores 457047 against the EPYC 9634's 353784, a margin of 29.2%. This is a substantial lead that points to the newer architecture's improved floating-point execution capabilities. Similarly, in extended instructions, the EPYC 9535 posts 175784 compared to 137543, a 27.8% advantage. Single-thread performance follows the same pattern, with the EPYC 9535 scoring 3720 versus 2924, a 27.2% improvement, which reflects the higher boost clock of 4.30 GHz against the EPYC 9634's 3.70 GHz.

The EPYC 9634, however, delivers its own emphatic counterpunch in physics calculations. It scores 12291 against the EPYC 9535's 3834, a staggering 68.8% difference. This is the single largest delta in the entire head-to-head set and suggests that the EPYC 9634's higher core count of 84 provides a significant advantage in workloads that scale with core parallelism. The EPYC 9634 also wins in data encryption, scoring 151943 versus 127372, a 16.2% lead, and in prime number finding with 1176 versus 874, a 25.7% margin. Its final win comes in random string sorting, where it scores 261134 against 247506, a more modest 5.2% edge.

The remaining contests are closer. Data compression sees the EPYC 9535 edge ahead with 2308822 versus 2236412, a 3.2% win. Multithread performance also favors the EPYC 9535, which scores 114528 compared to 107944, a 6.1% advantage. Integer math is the tightest race of all, with the EPYC 9535 scoring 730281 against the EPYC 9634's 725356, a razor-thin 0.7% margin.

Looking at the broader database context, the EPYC 9535 holds an average benchmark score of 379408 and ranks in the 100th percentile among all CPUs. Its nearest rivals include the AMD EPYC 9655 at 373479 (1.6% behind) and the Intel Xeon 6960P at 365194 (3.9% behind). The EPYC 9634, by contrast, has an average score of 244274 and ranks in the 99th percentile. Its nearest competition includes the Intel Xeon 6747P at 238263 (2.5% behind) and the AMD EPYC 9455P at 217854 (12.1% behind). This places the EPYC 9634 in a lower performance tier overall, even though it excels in specific parallel workloads.

The Verdict

The data presents a straightforward conclusion: the AMD EPYC 9535 is the superior processor in the majority of measured scenarios. Its 7-4 win record in head-to-head benchmarks, combined with its 100th percentile ranking versus the EPYC 9634's 99th, makes it the default choice for general-purpose server workloads. The average benchmark score of 379408 for the EPYC 9535 versus 244274 for the EPYC 9634, a difference of roughly 55%, reinforces this hierarchy.

However, the verdict is not absolute. The EPYC 9634's 68.8% victory in physics calculations is too large to ignore, and its wins in encryption, prime number finding, and string sorting demonstrate that it remains competitive in specific niches. Organizations running workloads that emphasize these parallel, compute-intensive tasks may find the EPYC 9634 sufficient, particularly given its lower TDP of 290 watts compared to the EPYC 9535's 300 watts.

From the recorded data, the EPYC 9535 should be selected for any workload that benefits from higher single-thread performance, floating-point throughput, or extended instruction set efficiency. The EPYC 9634, meanwhile, is the pick for physics simulation, encryption-heavy tasks, and prime number computation, where its core count of 84 over the EPYC 9535's 64 translates directly into benchmark wins.

Where Each One Wins

The benchmark breakdown maps cleanly onto workload categories.

AMD EPYC 9535 wins: Floating point math (29.2% ahead), extended instructions (27.8% ahead), single-thread performance (27.2% ahead), multithread performance (6.1% ahead), data compression (3.2% ahead), and integer math (0.7% ahead). These results indicate a processor that excels in general-purpose computing, scientific calculations with heavy floating-point usage, and applications that rely on modern instruction set extensions. The single-thread lead of 27.2% is particularly notable for database workloads, web serving, and any application with serial components.

AMD EPYC 9634 wins: Physics calculations (68.8% ahead), prime number finding (25.7% ahead), data encryption (16.2% ahead), and random string sorting (5.2% ahead). These victories cluster around workloads that scale almost linearly with core count. The 84-core configuration provides a clear parallel advantage over the 64-core EPYC 9535 in these scenarios. Physics simulation, cryptographic operations, and certain sorting algorithms that can be parallelized across many threads will favor the EPYC 9634.

FAQ

Q: Which processor has a higher single-thread score?

A: The AMD EPYC 9535 scores 3720 in the single-thread test, which is 27.2% higher than the EPYC 9634's 2924. This aligns with its higher boost clock of 4.30 GHz versus 3.70 GHz.

Q: Does the EPYC 9634 ever beat the EPYC 9535 by a large margin?

A: Yes, the EPYC 9634 wins physics calculations by a massive 68.8%, scoring 12291 against 3834. It also leads in data encryption by 16.2% and prime number finding by 25.7%.

Q: What is the total number of wins for each processor in the head-to-head tests?

A: The AMD EPYC 9535 wins 7 of the 11 recorded head-to-head benchmark comparisons, while the AMD EPYC 9634 wins 4.

Q: How do these processors compare in overall average benchmark score?

A: The EPYC 9535 has an average benchmark score of 379408, while the EPYC 9634 averages 244274. The EPYC 9535 also ranks in the 100th percentile of all CPUs, compared to the EPYC 9634's 99th percentile.

Q: Which processor has more cores and threads?

A: The AMD EPYC 9634 has 84 cores and 168 threads. The AMD EPYC 9535 has 64 cores and 128 threads.

Q: Is there any benchmark where the two processors are nearly tied?

A: Yes, integer math is the closest contest. The EPYC 9535 scores 730281 and the EPYC 9634 scores 725356, a difference of just 0.7%.

Architecture Differences

The two processors come from different architectural generations, and the recorded data shows the impact of that generational leap. The AMD EPYC 9535 is built on the Zen 5 architecture with the codename Turin, using a 4 nm process node from TSMC. The AMD EPYC 9634 uses the Zen 4 architecture with the codename Genoa, fabricated on a 5 nm process node, also from TSMC. The transition from 5 nm to 4 nm contributes to the EPYC 9535's efficiency and clock speed advantages.

The EPYC 9535 contains 66,520 million transistors across 8 dies, each measuring 70.6 mm². The EPYC 9634 contains more transistors, 78,840 million, spread across 12 dies of 72 mm² each. The higher transistor count in the EPYC 9634 reflects its larger core count of 84 versus 64.

Cache configurations differ significantly. The EPYC 9535 provides 80 KB of L1 cache per core and 1 MB of L2 cache per core, with a shared L3 cache of 256 MB. The EPYC 9634 offers 64 KB of L1 cache per core and 1 MB of L2 cache per core, but its shared L3 cache is larger at 384 MB. The difference in L3 cache size, 256 MB versus 384 MB, may influence workloads with large working sets, though the benchmark data shows the EPYC 9535 still holds the overall performance edge.

Memory bandwidth also differs. The EPYC 9535 supports 576.0 GB/s of memory bandwidth, while the EPYC 9634 supports 460.8 GB/s. Both use DDR5 memory with a twelve-channel memory bus, and both support ECC memory. PCIe capabilities are identical, with Gen 5 and 128 lanes available on the CPU only for both processors.

The EPYC 9535 boosts to 4.30 GHz from a base clock of 2.40 GHz. The EPYC 9634 boosts to 3.70 GHz from a base clock of 2.25 GHz. The higher clocks on the EPYC 9535, combined with the Zen 5 architecture's IPC improvements, explain its dominance in single-thread and floating-point benchmarks.

Specification Differences

The two processors share several specifications: both use AMD Socket SP5, both are server/workstation parts, both are active in production, both have locked multipliers, and both offer Gen 5 PCIe with 128 lanes. They also both support DDR5 memory with a twelve-channel bus and ECC memory.

The differences are concentrated in core configuration, clocks, power, cache, and memory bandwidth. The EPYC 9634 has 84 cores and 168 threads, while the EPYC 9535 has 64 cores and 128 threads. The EPYC 9535 has a higher base clock of 2.40 GHz versus 2.25 GHz and a higher boost clock of 4.30 GHz versus 3.70 GHz. TDP is similar but not identical, with the EPYC 9535 rated at 300 watts and the EPYC 9634 at 290 watts.

L1 cache differs, with the EPYC 9535 offering 80 KB per core and the EPYC 9634 offering 64 KB per core. L2 cache is the same at 1 MB per core. L3 cache is larger on the EPYC 9634 at 384 MB shared, versus 256 MB shared on the EPYC 9535. Memory bandwidth is higher on the EPYC 9535 at 576.0 GB/s versus 460.8 GB/s.

The EPYC 9535 was released on 2024-10-09, while the EPYC 9634 was released on 2022-11-09. The EPYC 9535 has a launch MSRP of $8992, while the EPYC 9634 has a launch MSRP of $10304. The EPYC 9535 carries part number 100-000001147, and the EPYC 9634 carries part number 100-100000797. The EPYC 9535 has no integrated graphics, and the same is recorded for the EPYC 9634.