AMD EPYC 9535 vs AMD EPYC 9655P Comparison

The Verdict

The AMD EPYC 9655P is the decisive winner in this comparison, taking all 11 head-to-head benchmarks against the AMD EPYC 9535 with no losses. The data shows a 4.8% higher average benchmark score for the 9655P (397,773 vs 379,408), driven primarily by its 96 cores versus 64 cores and its higher boost clock of 4.50 GHz compared to 4.30 GHz. For workloads that scale with core count and parallel throughput, the 9655P is the clear choice — its 40.1% lead in multi-threaded performance and 51% lead in data compression make it substantially faster for dense compute, virtualization, and database workloads. However, the 9535 is not without merit: it holds a 1.6% average score advantage over the AMD EPYC 9655 (non-P) and a 3.9% edge over the Intel Xeon 6960P, making it a strong mid-range server part. The 9535's single-thread score of 3,720 trails the 9655P's 3,849 by just 3.5%, so for lightly threaded tasks the gap narrows considerably. The verdict: the 9655P is for buyers who need maximum core density and throughput; the 9535 is for those who want 64 solid Zen 5 cores with lower power demands (300W TDP vs 400W) and still near-top-tier performance.

Architecture Differences

Both processors share the same fundamental architecture: Zen 5, codename Turin, built on TSMC's 4 nm process node, using the AMD Socket SP5 platform. The 9655P packs 96 cores and 192 threads, while the 9535 offers 64 cores and 128 threads — a 50% core advantage for the 9655P. The transistor counts reflect this: the 9655P has 99,780 million transistors across 12 chiplets of 70.6 mm² each, while the 9535 uses 66,520 million transistors across 8 chiplets of the same 70.6 mm² die size. Cache configurations scale accordingly: both share 80 KB of L1 per core and 1 MB of L2 per core, but the 9655P has 384 MB of shared L3 cache versus 256 MB on the 9535 — a 50% increase in last-level cache that directly benefits large working sets.

Clock speeds differ as well. The 9655P has a base clock of 2.60 GHz and a boost clock of 4.50 GHz; the 9535 runs at 2.40 GHz base and 4.30 GHz boost. The 9655P's higher boost clock gives it a 0.20 GHz advantage in single-thread bursts, though the 3.5% single-thread benchmark delta shows the real-world impact is modest. Both processors feature identical memory subsystems — DDR5 with twelve-channel support and 576.0 GB/s of bandwidth — and both support ECC memory, which is standard for server platforms. PCIe connectivity is also identical: Gen 5 with 128 lanes (CPU only) on both parts, meaning expansion capability is not a differentiator. Neither chip has integrated graphics, and both are locked (multiplier unlocked: false). Both launched on October 9, 2024, with the 9655P at a launch MSRP of $10811 and the 9535 at $8992.

Where Each One Wins

The 9655P wins everywhere in this matchup — all 11 head-to-head benchmarks favor it — but the magnitude of the wins varies dramatically by workload type. The largest advantage comes in PassMark physics, where the 9655P scores 25,847 versus the 9535's 3,834, a 574.2% delta. This is an outlier result that suggests the 9655P's additional cores and cache dramatically accelerate physics simulation workloads, which are typically parallel and memory-intensive. Data encryption shows a 72.8% lead (220,074 vs 127,372), reflecting the 9655P's higher core count and boost clock for cryptographic operations. Integer math is 67.8% faster (1,225,251 vs 730,281), and floating-point math is 56.6% faster (715,866 vs 457,047) — both consistent with a 50% core advantage plus higher clocks.

The 9655P's smallest win is in single-threaded performance, where it leads by just 3.5% (3,849 vs 3,720). This is the most relevant metric for legacy single-threaded applications or lightly threaded workloads. The 9535, while losing every benchmark, still posts strong absolute numbers: its 114,528 multi-thread score and 730,281 integer math score place it well above the Intel Xeon 6960P (which the 9535 beats by 3.9% on average) and the AMD EPYC 9754 (4.1% ahead). For buyers who need 64 cores but not 96, the 9535 offers comparable per-core performance with a 100W lower TDP (300W vs 400W), which can simplify cooling and power delivery in dense server chassis.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 9655P has 96 cores and 192 threads, while the AMD EPYC 9535 has 64 cores and 128 threads. The 9655P offers a 50% increase in both core and thread counts.

Q: How big is the performance gap in multi-threaded workloads?

A: The 9655P leads by 40.1% in PassMark multi-thread (160,490 vs 114,528) and by 51% in data compression (3,486,158 vs 2,308,822). The average benchmark score difference is 4.8% in favor of the 9655P.

Q: Is the 9535 competitive in single-threaded performance?

A: Yes, the gap is small. The 9655P scores 3,849 in PassMark single-thread versus the 9535's 3,720, a 3.5% difference. Both have high boost clocks (4.50 GHz vs 4.30 GHz) that keep single-thread performance close.

Q: What are the cache differences between the two?

A: The 9655P has 384 MB of shared L3 cache, while the 9535 has 256 MB. Both have 80 KB L1 per core and 1 MB L2 per core. The 9655P's larger L3 cache benefits workloads with large data sets.

Q: Do they have the same memory and PCIe support?

A: Yes, both support DDR5 with twelve-channel memory and 576.0 GB/s bandwidth, and both have PCIe Gen 5 with 128 lanes (CPU only). ECC memory is supported on both, and neither has integrated graphics.

Q: What is the TDP difference?

A: The 9655P has a 400W TDP, while the 9535 has a 300W TDP. The 9535's lower power draw may be preferable in power-constrained environments, though the 9655P's performance advantages are substantial.

Head-to-Head Benchmarks

The 9655P's most dominant win is in PassMark physics, where it scores 25,847 against the 9535's 3,834 — a 574.2% advantage. This is by far the largest delta in the benchmark suite and suggests that physics simulation workloads, which often scale with core count and cache capacity, see extraordinary gains on the 96-core part. The 9655P also excels in data encryption (220,074 vs 127,372, +72.8%) and random string sorting (451,824 vs 247,506, +82.6%), both of which benefit from the higher core count and larger L3 cache.

In integer math, the 9655P scores 1,225,251 versus 730,281 for the 9535, a 67.8% lead. Floating-point math shows a 56.6% advantage (715,866 vs 457,047). Data compression is 51% faster (3,486,158 vs 2,308,822), and find prime numbers is 92.9% faster (1,686 vs 874) — another workload where core scaling is nearly linear. Extended instructions are 31.2% ahead (230,609 vs 175,784), which is a more moderate gain, likely due to per-core instruction-level parallelism being similar.

The multi-thread benchmark shows a 40.1% lead (160,490 vs 114,528), which is below the 50% core-count difference, indicating some scaling inefficiency at 96 cores. The single-thread benchmarks are the closest: both passmark_single_thread and passmark_singlethread show 3,849 vs 3,720, a 3.5% delta. This is consistent with the 0.20 GHz boost clock difference and confirms that the 9655P's per-core performance is only marginally better. Overall, the 9655P wins 11 of 11 benchmarks, with no benchmark where the 9535 takes the lead.

Specification Differences

The two processors differ in several key specifications. Core count is the most significant: the 9655P has 96 cores versus the 9535's 64, and 192 threads versus 128. Clock speeds differ, with the 9655P at 2.60 GHz base and 4.50 GHz boost, compared to the 9535's 2.40 GHz base and 4.30 GHz boost. The TDP is 400W for the 9655P and 300W for the 9535, a 100W gap that affects thermal design and power supply requirements. Transistor count is 99,780 million on the 9655P versus 66,520 million on the 9535, with 12 chiplets versus 8 chiplets at the same 70.6 mm² die size each. L3 cache is 384 MB shared on the 9655P versus 256 MB shared on the 9535. The launch MSRP differs: $10811 for the 9655P and $8992 for the 9535. Both share the same socket (AMD Socket SP5), architecture (Zen 5), process node (4 nm TSMC), memory support (DDR5, twelve-channel, 576.0 GB/s), PCIe (Gen 5, 128 lanes), ECC support, and lack of integrated graphics. Both are locked multipliers, both are active production parts, and both launched on October 9, 2024. The part numbers are 100-000001522 for the 9655P and 100-000001147 for the 9535.