AMD EPYC 9684X vs AMD Ryzen Threadripper 9970X Comparison

The AMD Ryzen Threadripper 9970X and AMD EPYC 9684X represent two distinct extremes within AMD's high-performance lineup, separated by architecture generation, core count, and intended market. The benchmark data shows a clear split: the EPYC 9684X dominates in multi-threaded and throughput-intensive workloads, while the Threadripper 9970X delivers a decisive victory in single-thread performance. The EPYC 9684X wins 9 of 11 head-to-head benchmark comparisons, while the Threadripper 9970X takes only 2, yet the latter's wins are substantial enough to define its use case. The average benchmark scores reflect the overall balance: the Threadripper 9970X posts an average score of 279,778, which is 4.6% higher than the EPYC 9684X's 266,914, according to the nearestRivals data. This places the Threadripper 9970X slightly ahead on average, despite the EPYC's raw power in specific tests, highlighting that the choice between them depends heavily on workload characteristics rather than a simple performance hierarchy.

The Verdict

The data indicates that the AMD EPYC 9684X is the clear choice for workloads that scale with core count and memory bandwidth. Its 96 cores and 192 threads, combined with a massive 1152 MB of L3 cache, allow it to win decisively in all multi-threaded PassMark tests, including data compression, encryption, and floating-point math. The EPYC 9684X's 12-channel memory bus, offering 460.8 GB/s of bandwidth, supports these throughput-heavy tasks, and its 400 W TDP reflects its server-oriented design. For users running virtualization, large-scale data processing, or scientific simulations that can utilize dozens of cores, the EPYC 9684X is superior, as evidenced by its 34.9% lead in data compression and 51.4% lead in encryption over the Threadripper 9970X.

Conversely, the AMD Ryzen Threadripper 9970X is the better option for workloads where single-thread speed and low latency matter more than raw core count. Its 5.40 GHz boost clock, based on the Zen 5 architecture, delivers a 56.7% advantage in single-thread performance over the EPYC 9684X, a gap that is significant for applications like gaming, certain rendering tasks, or legacy software that relies on a few fast cores. The Threadripper 9970X also offers a lower launch MSRP of $2499 compared to the EPYC 9684X's $14756, though the data does not quantify the price-to-performance ratio. The Threadripper 9970X's unlocked multiplier and desktop market segment position it for users who need high clock speeds and flexibility, even if its 32 cores and 64 threads are fewer than the EPYC's. The verdict is straightforward: the EPYC 9684X for server-scale throughput, the Threadripper 9970X for desktop-class single-thread dominance.

Where Each One Wins

The EPYC 9684X wins in every multi-threaded PassMark benchmark, with margins ranging from 11.7% in multithread to 72.3% in physics. The largest wins come from workloads that leverage its core count and cache hierarchy: physics (72.3% lead), find prime numbers (69.6% lead), and data encryption (51.4% lead). These results indicate the EPYC 9684X excels in compute-intensive, parallel tasks that can saturate its 96 cores. Data compression shows a 34.9% lead, while floating-point math and integer math show 34.4% and 44.9% leads, respectively. Random string sorting also favors the EPYC 9684X by 45.2%, and extended instructions by 20%. These benchmarks collectively demonstrate that the EPYC 9684X is designed for heavy server workloads where every available core and the 1152 MB L3 cache can be utilized to maximum effect.

The Threadripper 9970X wins exclusively in single-thread performance, with both single-thread and singlethread benchmarks showing a score of 4530 versus the EPYC 9684X's 2891, a 56.7% advantage. This is the only category where the Threadripper 9970X excels, but it is a critical one for many desktop applications. The Threadripper 9970X's Zen 5 architecture and 5.40 GHz boost clock drive this win, while the EPYC 9684X's Zen 4 architecture and 3.70 GHz boost clock cannot compete in this metric. The data suggests that for users who prioritize responsiveness in single-threaded tasks, the Threadripper 9970X is the superior choice, even though it lags behind in all other benchmarks. The wins distribution—2 for the Threadripper 9970X, 9 for the EPYC 9684X—makes it clear that the EPYC 9684X is the overall performance leader, but the Threadripper 9970X's single-thread dominance cannot be ignored.

Architecture Differences

The two processors differ fundamentally in architecture, which explains their divergent benchmark results. The Threadripper 9970X uses the Zen 5 architecture on a 4 nm process node, codenamed Shimada Peak, while the EPYC 9684X uses the Zen 4 architecture on a 5 nm process node, codenamed Genoa-X. This generational difference contributes to the Threadripper 9970X's higher clock speeds: its base clock is 4.00 GHz and boost clock is 5.40 GHz, compared to the EPYC 9684X's 2.55 GHz base and 3.70 GHz boost. The Threadripper 9970X has 32 cores and 64 threads, while the EPYC 9684X has 96 cores and 192 threads, a 3x difference in core count that drives the multi-threaded performance gap.

Cache configurations also differ significantly. The Threadripper 9970X has 64 KB of L1 cache per core and 1 MB of L2 cache per core, with a total of 128 MB of L3 cache. The EPYC 9684X has the same per-core L1 and L2 cache sizes, but its L3 cache is listed as 1152 MB shared, a 9x increase over the Threadripper 9970X. This massive L3 cache is a hallmark of the EPYC 9684X's design, likely benefiting workloads with large working sets. The die size reflects the core count difference: the Threadripper 9970X uses 4x 70.6 mm² dies (totaling 33,260 million transistors), while the EPYC 9684X uses 12x 72 mm² dies (totaling 135,240 million transistors). The EPYC 9684X's transistor count is over 4x higher, consistent with its 96-core design.

Memory support further separates them. The Threadripper 9970X supports quad-channel DDR5 with 204.8 GB/s bandwidth, while the EPYC 9684X supports twelve-channel DDR5 with 460.8 GB/s bandwidth. Both support ECC memory. PCIe connectivity also differs: the Threadripper 9970X offers Gen 5 with 80 lanes (CPU only), while the EPYC 9684X offers Gen 5 with 128 lanes (CPU only), giving the EPYC more expansion capacity for server use. The Threadripper 9970X has an unlocked multiplier, while the EPYC 9684X is locked. The Threadripper 9970X uses AMD Socket sTR5, while the EPYC 9684X uses AMD Socket SP5. The Threadripper 9970X was released on 2025-07-29, while the EPYC 9684X was released on 2023-06-12, and both are active production parts.

FAQ

Q: Which processor is faster in multi-threaded workloads?

A: The AMD EPYC 9684X wins all 9 multi-threaded PassMark benchmarks, with leads ranging from 11.7% in multithread to 72.3% in physics. Its 96 cores and 192 threads, combined with 1152 MB of L3 cache, provide a substantial advantage over the Threadripper 9970X's 32 cores and 64 threads.

Q: How much better is the Threadripper 9970X in single-thread performance?

A: The Threadripper 9970X scores 4530 in single-thread benchmarks, which is 56.7% higher than the EPYC 9684X's 2891. This is driven by its Zen 5 architecture and 5.40 GHz boost clock, compared to the EPYC 9684X's Zen 4 architecture and 3.70 GHz boost clock.

Q: What is the difference in memory bandwidth between the two?

A: The EPYC 9684X offers 460.8 GB/s of memory bandwidth via its twelve-channel DDR5 memory bus, while the Threadripper 9970X offers 204.8 GB/s via a quad-channel DDR5 memory bus. This is a 2.25x difference in favor of the EPYC 9684X.

Q: Which processor has more PCIe lanes?

A: The EPYC 9684X provides 128 PCIe Gen 5 lanes (CPU only), while the Threadripper 9970X provides 80 PCIe Gen 5 lanes (CPU only). This gives the EPYC 9684X more room for expansion in server environments.

Q: Are both processors based on the same architecture?

A: No. The Threadripper 9970X uses Zen 5 architecture on a 4 nm process, codenamed Shimada Peak, while the EPYC 9684X uses Zen 4 architecture on a 5 nm process, codenamed Genoa-X. This architectural difference contributes to the Threadripper 9970X's higher clock speeds.

Q: What is the average benchmark score difference?

A: The Threadripper 9970X has an average benchmark score of 279,778, while the EPYC 9684X has an average of 266,914. This makes the Threadripper 9970X 4.6% higher on average, despite the EPYC 9684X winning more individual benchmarks.

Head-to-Head Benchmarks

The head-to-head data reveals a stark contrast in performance profiles. The EPYC 9684X wins 9 of 11 benchmarks, with the largest margins in physics and prime number finding. In physics, the EPYC 9684X scores 24,686 versus the Threadripper 9970X's 6,835, a 72.3% lead. This suggests the EPYC 9684X excels in simulation and physics-based workloads that leverage its core count. Similarly, in find prime numbers, the EPYC 9684X scores 2,020 versus 615, a 69.6% advantage, indicating strong integer computation capabilities. Data encryption shows a 51.4% lead (178,453 vs 86,765), and random string sorting shows a 45.2% lead (349,126 vs 191,445).

The EPYC 9684X also leads in integer math with a 44.9% advantage (844,145 vs 465,378) and floating-point math with a 34.4% advantage (472,174 vs 309,719). Data compression shows a 34.9% lead (2,698,807 vs 1,757,998), and extended instructions show a 20% lead (177,956 vs 142,342). The multithread benchmark is the closest contest, with the EPYC 9684X scoring 121,595 versus 107,399, an 11.7% lead. These results consistently favor the EPYC 9684X in parallel workloads, reflecting its higher core and thread counts.

The Threadripper 9970X wins decisively in single-thread benchmarks, scoring 4,530 versus 2,891, a 56.7% lead in both single-thread and singlethread tests. This is the only area where the Threadripper 9970X prevails, but the margin is substantial. The data shows that for users running single-threaded applications, the Threadripper 9970X is significantly faster, while the EPYC 9684X is the clear winner for multi-threaded tasks. The wins tally of 2 for the Threadripper 9970X and 9 for the EPYC 9684X underscores the EPYC 9684X's dominance in most benchmark scenarios, but the single-thread gap is large enough to matter for specific use cases.