AMD EPYC 9535 vs AMD EPYC 9565 Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive overall victory for the AMD EPYC 9565, which takes 8 of the 11 shared benchmark tests. The AMD EPYC 9535 manages only 3 wins, and two of those are essentially ties on the same single-thread test. The margin of victory for the EPYC 9565 is often substantial, particularly in integer-heavy and parallel workloads.

The largest single gap appears in the PassMark physics test. The EPYC 9565 scores 18036 against 3834 for the EPYC 9535, a difference of 78.7 percent. This is the most lopsided result in the comparison and points to a major advantage in heavily threaded simulation workloads. Similarly, the prime number finding test shows a 63.9 percent lead for the EPYC 9565, with scores of 2422 versus 874. These two results dominate the overall benchmark picture.

The EPYC 9565 also leads clearly in extended instructions, scoring 209595 versus 175784, a 16.1 percent edge. Floating point math goes to the EPYC 9565 by 16.8 percent, with 549422 against 457047. Multithread performance favors the larger chip by 15.3 percent, recording 135221 versus 114528. Data compression shows a 10.5 percent advantage for the EPYC 9565, scoring 2579631 compared to 2308822. The encryption test also goes to the EPYC 9565, with 141936 versus 127372, a 10.3 percent margin. Random string sorting completes the list of EPYC 9565 wins, coming in 15.2 percent ahead with 291941 against 247506.

The EPYC 9535 does secure one meaningful victory. In integer math, it scores 730281 against 717948 for the EPYC 9565, a 1.7 percent lead. This is a narrow win, but it is a genuine reversal of the overall trend. The single-thread test is nearly dead even: the EPYC 9535 scores 3720 and the EPYC 9565 scores 3696, a 0.6 percent edge for the smaller chip. Both the listed single-thread and singlethread entries report the same values, confirming the result.

Looking at the broader competitive landscape in the database, the EPYC 9535 sits at the 100th percentile among all CPUs, while the EPYC 9565 is at the 99th percentile. The EPYC 9535 has a higher average benchmark score of 379408, compared to 285471 for the EPYC 9565. This discrepancy stems from the fact that the EPYC 9535 has fewer recorded benchmark entries, and its average is pulled up by the compression and integer math results. The EPYC 9565 has additional Cinebench scores in its record, including a Cinebench R23 multicore score of 114937 and a single-core score of 16226, which lower its overall average.

Architecture Differences

Both processors belong to the EPYC 9005 series and share the Zen 5 architecture with the Turin codename. Both are built on a 4 nm process at TSMC. The fundamental design is the same, but the physical scale differs substantially.

The EPYC 9535 packs 64 cores and 128 threads, while the EPYC 9565 has 72 cores and 144 threads. That extra core count is the primary driver of the EPYC 9565's performance lead in parallel workloads. The transistor count reflects this difference: the EPYC 9565 contains 99,780 million transistors, while the EPYC 9535 has 66,520 million. The die configuration also differs, with the EPYC 9535 using 8x 70.6 mm² chiplets and the EPYC 9565 using 12x 70.6 mm² chiplets. The larger chiplet count explains the higher transistor total and the additional cores.

Cache hierarchy follows the core count. Both chips have 80 KB of L1 cache per core and 1 MB of L2 cache per core. The shared L3 cache differs: the EPYC 9535 has 256 MB, while the EPYC 9565 has 384 MB. This 128 MB difference in L3 capacity is significant for workloads that repeatedly access large datasets.

Base clock speeds favor the EPYC 9565, which runs at 3.15 GHz compared to 2.40 GHz for the EPYC 9535. Boost clocks are identical at 4.30 GHz. The higher base clock on the EPYC 9565 contributes to its advantage in latency-sensitive tasks and partially explains why it wins even some tests that are not purely core-count dependent. The thermal design power reflects the scale difference: the EPYC 9565 is rated at 400 watts, while the EPYC 9535 is rated at 300 watts. Both use the AMD Socket SP5.

Memory support is identical on paper. Both support DDR5 with a twelve-channel memory bus and 576.0 GB/s of bandwidth, along with ECC memory support. PCIe connectivity is also the same: Gen 5 with 128 lanes available from the CPU. Neither chip has integrated graphics. Both are listed as active production parts with a release date of October 9, 2024. Neither has an unlocked multiplier.

Where Each One Wins

The AMD EPYC 9565 is the clear choice for heavily threaded, compute-intensive server workloads. Its 72 cores and 144 threads, combined with a higher base clock and larger L3 cache, deliver commanding leads in physics simulation, prime number finding, extended instruction processing, and floating point math. The 78.7 percent gap in physics and the 63.9 percent gap in prime numbers indicate that this chip is built for sustained parallel execution across many cores. Data compression, encryption, multithread, and random string sorting all follow the same pattern, with margins between 10.3 and 16.1 percent. Any workload that scales across cores will favor the EPYC 9565.

The AMD EPYC 9535 wins only where core count matters less. Its integer math score is 1.7 percent higher than the EPYC 9565, a small but measurable edge. Single-thread performance is also marginally better, at 0.6 percent ahead. This suggests that the EPYC 9535 has slightly better per-core efficiency in certain scalar workloads, possibly due to its lower core count allowing for more favorable clock behavior under load. For software that is lightly threaded or that performs primarily integer arithmetic, the EPYC 9535 can hold its own.

In practice, the split is straightforward. The EPYC 9565 dominates database workloads, scientific computing, rendering, and any virtualized environment where many concurrent threads are active. The EPYC 9535 is more suitable for applications that are latency-sensitive, moderately threaded, or that require strong integer throughput without the need for the full 72-core complement. The EPYC 9535 also offers a lower thermal design power, which may simplify cooling requirements in dense server chassis, though both parts require robust cooling solutions given their 300 and 400 watt ratings.

Specification Differences

The two processors differ in several key specifications, all of which stem from the core count scaling.

Cores: 64 on the EPYC 9535, 72 on the EPYC 9565. Threads: 128 versus 144. Base clock: 2.40 GHz versus 3.15 GHz. Boost clock is the same at 4.30 GHz. Thermal design power: 300 watts versus 400 watts. Transistor count: 66,520 million versus 99,780 million. Die configuration: 8x 70.6 mm² versus 12x 70.6 mm². L3 cache: 256 MB shared versus 384 MB shared. Launch MSRP: $8992 for the EPYC 9535 and $10486 for the EPYC 9565.

All other specifications are identical: socket, architecture, codename, process node, foundry, L1 and L2 cache sizes, memory support, memory bus, memory bandwidth, ECC support, PCIe generation and lane count, integrated graphics, market segment, production status, release date, and multiplier lock status.

FAQ

Q: Which processor has more cores?

A: The AMD EPYC 9565 has 72 cores and 144 threads, while the AMD EPYC 9535 has 64 cores and 128 threads.

Q: How do the base clock speeds compare?

A: The EPYC 9565 has a base clock of 3.15 GHz, while the EPYC 9535 runs at 2.40 GHz. Both have a boost clock of 4.30 GHz.

Q: What is the L3 cache capacity on each chip?

A: The EPYC 9535 has 256 MB of shared L3 cache, while the EPYC 9565 has 384 MB of shared L3 cache.

Q: Which processor wins the PassMark physics test?

A: The EPYC 9565 wins decisively with a score of 18036, which is 78.7 percent higher than the EPYC 9535's score of 3834.

Q: Does the EPYC 9535 win any benchmark tests?

A: Yes, the EPYC 9535 wins the integer math test by 1.7 percent (730281 versus 717948) and the single-thread test by 0.6 percent (3720 versus 3696).

Q: What is the thermal design power of each processor?

A: The EPYC 9535 is rated at 300 watts, and the EPYC 9565 is rated at 400 watts.