CPU Comparison

The AMD EPYC 9335 and AMD EPYC 7763 represent two distinct generations of AMD's server platforms, and the benchmark data shows a clear split between raw multi-threaded dominance and modern architectural efficiency. The EPYC 7763, with its 64-core configuration, wins the majority of the head-to-head tests, but the EPYC 9335 demonstrates superior single-thread performance and a significantly higher average benchmark score when accounting for its modern platform advantages. The data indicates that the older Milan part retains a substantial lead in heavily parallel workloads, while the newer Turin chip is the better choice for frequency-sensitive and per-core tasks.

Head-to-Head Benchmarks

The AMD EPYC 7763 is the clear winner in raw computational throughput, taking 8 of the 11 head-to-head benchmark comparisons. The most decisive victory for the older chip comes in the PassMark physics test, where it scores 7708 against the EPYC 9335's 1905, a staggering delta of -75.3% in favor of the 7763. This indicates that the 64-core Milan processor is vastly superior in simulations that scale aggressively with core count. Similarly, in the find prime numbers test, the EPYC 7763 scores 668 versus 340, a 49.1% advantage, and in data encryption it posts 121001 against 63159, a 47.8% lead. These results show that the older part's doubling of cores and threads (128 versus 64) provides an insurmountable advantage in purely parallel integer and encryption workloads.

The EPYC 7763 also wins the more general multi-threaded benchmark, scoring 84591 compared to the EPYC 9335's 65811, a 22.2% difference. Its lead extends to integer math, where it scores 516920 versus 346291 (a 33% gap), and floating-point math, where it achieves 287919 against 228123 (a 20.8% advantage). In data compression, the 7763 again prevails with 1628973 versus 1203096, a 26.1% margin, and in random string sorting it wins with 182676 against 116608, a 36.2% lead. These numbers consistently show that the extra 32 cores and 64 threads of the EPYC 7763 translate directly into superior performance for any workload that can utilize them.

However, the AMD EPYC 9335 is not without its victories, and its wins are indicative of its architectural superiority. In the PassMark single-thread test, the 9335 scores 2732 against the 7763's 2518, an 8.5% improvement. This is a critical metric for database and latency-sensitive applications where per-core speed is paramount. The 9335 also wins the extended instructions benchmark, scoring 105706 against 98294, a 7.5% lead, suggesting its Zen 5 architecture handles newer instruction sets more efficiently. While the 9335 only wins 3 of the 11 tests, its average benchmark score of 194228 is higher than the 7763's 179916, indicating that its wins are in areas that meaningfully contribute to overall system responsiveness and modern workload efficiency.

FAQ

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

A: The AMD EPYC 9335 is superior in single-threaded tasks. It scores 2732 in the PassMark single-thread test, which is 8.5% higher than the AMD EPYC 7763's score of 2518.

Q: Is the older AMD EPYC 7763 faster in multi-threaded workloads?

A: Yes, the data shows the EPYC 7763 is significantly faster. It wins the PassMark multi-thread test with a score of 84591 compared to the EPYC 9335's 65811, representing a 22.2% advantage.

Q: What is the most significant performance gap between the two processors?

A: The largest disparity is in the PassMark physics test. The EPYC 7763 scores 7708, which is 75.3% higher than the EPYC 9335's 1905. This suggests the 64-core part is dramatically better for physics simulations.

Q: How do their average benchmark scores compare?

A: The AMD EPYC 9335 has a higher average benchmark score of 194228, while the AMD EPYC 7763 has an average score of 179916.

Q: Does the newer EPYC 9335 win any benchmark categories?

A: Yes, it wins three categories: single-thread (2732 vs 2518), singlethread (2732 vs 2518), and extended instructions (105706 vs 98294).

Q: Are both processors still in active production?

A: Yes, both the AMD EPYC 9335 and the AMD EPYC 7763 have a production status of "Active."

Architecture Differences

The two processors are built on fundamentally different architectures and manufacturing processes. The AMD EPYC 9335 is part of the EPYC 9005 series and is based on the Zen 5 architecture with the codename "Turin." It is manufactured on a 4 nm process at TSMC, which is a significant shrink from the older part. In contrast, the AMD EPYC 7763 belongs to the EPYC 7003 series and uses the Zen 3 architecture with the codename "Milan," built on a 7 nm process. This generational leap explains the EPYC 9335's higher clock speeds and better single-thread efficiency despite having fewer cores.

The transistor counts are nearly identical, with the EPYC 9335 featuring 33,260 million transistors and the EPYC 7763 featuring 33,200 million, but the die layout differs. The EPYC 9335 uses a 4x 70.6 mm² die configuration, while the EPYC 7763 uses an 8x 81 mm² setup. The cache hierarchies also differ significantly. The EPYC 9335 has 80 KB of L1 cache and 1 MB of L2 cache per core, with a shared 128 MB L3 cache. The EPYC 7763 has smaller per-core caches at 64 KB L1 and 512 KB L2, but compensates with a larger shared 256 MB L3 cache.

Memory support is another key architectural differentiator. The EPYC 9335 supports DDR5 memory with a twelve-channel memory bus and a memory bandwidth of 576.0 GB/s. The EPYC 7763, being an older design, supports DDR4 memory with an eight-channel bus and a significantly lower memory bandwidth of 204.8 GB/s. This gives the newer chip a 2.8x theoretical bandwidth advantage, which is critical for memory-intensive server workloads. Both processors support ECC memory and offer PCIe Gen 5 with 128 lanes on the EPYC 9335, while the EPYC 7763 offers PCIe Gen 4 with the same 128 lanes.

Specification Differences

The most obvious specification difference is the core and thread count. The AMD EPYC 7763 offers 64 cores and 128 threads, double the 32 cores and 64 threads of the AMD EPYC 9335. This is the primary reason for the older chip's dominance in multi-threaded benchmarks. Clock speeds also favor the newer chip, with the EPYC 9335 having a base clock of 3.00 GHz and a boost clock of 4.40 GHz, compared to the EPYC 7763's base of 2.45 GHz and boost of 3.50 GHz.

The thermal design power (TDP) differs, with the EPYC 9335 rated at 210 W and the EPYC 7763 rated higher at 280 W. The socket compatibility is entirely different: the EPYC 9335 uses AMD Socket SP5, while the EPYC 7763 uses AMD Socket SP3. This means they are not interchangeable on the same motherboard. The process node is a major difference, with the EPYC 9335 using 4 nm technology versus the EPYC 7763's 7 nm process. The memory support differs as noted, with the EPYC 9335 using DDR5 and the EPYC 7763 using DDR4. The launch MSRP for the EPYC 9335 is $3178, while the EPYC 7763 launched at $7890.

The Verdict

The data presents a clear verdict for different use cases. If the workload is heavily multi-threaded and can utilize more than 64 threads, the AMD EPYC 7763 is the definitive choice. Its 64 cores and 128 threads deliver substantial wins in 8 out of 11 benchmarks, with leads ranging from 20.8% in floating-point math to a massive 75.3% in physics simulations. For high-performance computing, data encryption, and batch processing tasks that scale linearly with core count, the EPYC 7763's raw throughput is unmatched in this comparison.

However, if the workload is primarily single-threaded or requires high memory bandwidth, the AMD EPYC 9335 is the superior processor. It wins the single-thread benchmark by 8.5% and offers a twelve-channel DDR5 memory interface with 576.0 GB/s of bandwidth, which is 2.8x higher than the EPYC 7763's DDR4 setup. Its higher average benchmark score of 194228, despite losing most head-to-head tests, indicates that its performance in modern, latency-sensitive tasks is more valuable. The EPYC 9335 is better for database servers, virtualization hosts, and applications where per-core performance and memory throughput dictate responsiveness.

Where Each One Wins

AMD EPYC 9335 Wins:

• Single-thread performance: The 9335 is 8.5% faster in the PassMark single-thread test, making it the better choice for lightly threaded software and tasks that depend on low latency per core.
• Extended instructions: Its 7.5% lead in extended instructions shows better support for modern CPU instruction sets, which can accelerate specific scientific and cryptographic workloads.
• Memory bandwidth: The twelve-channel DDR5 memory bus provides 576.0 GB/s, a substantial advantage for memory-bound applications. This is a qualitative win based on the specification data, as the benchmark scores do not directly test memory bandwidth.

AMD EPYC 7763 Wins:

• Multi-threaded throughput: Wins the multi-thread test by 22.2% and dominates in integer math (33% lead), floating-point math (20.8% lead), and data compression (26.1% lead).
• Physics and simulation: The 75.3% lead in the physics test is the largest margin of any benchmark, indicating exceptional performance for simulation and scientific computing workloads.
• Encryption and prime number finding: The 47.8% lead in data encryption and 49.1% lead in find prime numbers show a strong advantage in cryptographic and number-theoretic tasks that can use all available cores.