AMD EPYC 9684X vs AMD Ryzen Threadripper 9980X Comparison

The AMD Ryzen Threadripper 9980X and the AMD EPYC 9684X represent two very different approaches to high-core-count computing. The Threadripper 9980X is a desktop-class processor built for maximum single-thread responsiveness and creator workloads, while the EPYC 9684X is a server chip designed for massive parallel throughput and memory bandwidth. The recorded data shows a clear split: the Threadripper wins 13 of the 17 shared benchmark comparisons, but the EPYC dominates in several specialized server-oriented tests. This analysis breaks down the architecture, benchmark results, and the specific use cases where each processor excels.

FAQ

Q: Which processor has more cores?

A: The AMD EPYC 9684X has 96 cores and 192 threads, while the AMD Ryzen Threadripper 9980X has 64 cores and 128 threads. The EPYC offers 50% more cores and threads.

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

A: The AMD Ryzen Threadripper 9980X is significantly faster. In the PassMark single-thread test, it scores 4537 compared to the EPYC's 2891, a lead of 56.9%. The Cinebench R23 single-core score also favors the Threadripper, 18427 versus 14591.

Q: Which processor has the larger L3 cache?

A: The AMD EPYC 9684X has a much larger L3 cache at 1152 MB shared, compared to the AMD Ryzen Threadripper 9980X's 256 MB. This large cache is a key feature for server workloads that repeatedly access large datasets.

Q: What is the memory bandwidth difference?

A: The AMD EPYC 9684X supports twelve-channel memory, providing a memory bandwidth of 460.8 GB/s. The AMD Ryzen Threadripper 9980X supports quad-channel memory, with a bandwidth of 204.8 GB/s, less than half that of the EPYC.

Q: Which processor has a higher boost clock?

A: The AMD Ryzen Threadripper 9980X has a boost clock of 5.40 GHz, which is substantially higher than the EPYC 9684X's boost clock of 3.70 GHz. This higher clock speed directly contributes to its single-thread performance advantage.

Q: Which processor wins the most benchmark comparisons?

A: The AMD Ryzen Threadripper 9980X wins 13 out of the 17 head-to-head benchmark comparisons. The AMD EPYC 9684X wins the remaining 4 comparisons, which include encryption, prime number finding, physics, and random string sorting.

Architecture Differences

The two processors are built on fundamentally different architectures. The AMD Ryzen Threadripper 9980X uses the Zen 5 architecture, codenamed Shimada Peak, on a 4 nm process node from TSMC. It is part of the Ryzen Threadripper 9000 series. In contrast, the AMD EPYC 9684X uses the older Zen 4 architecture, codenamed Genoa-X, on a 5 nm process node from TSMC. It belongs to the EPYC 9004 series.

The core counts differ significantly, with the EPYC 9684X housing 96 cores and 192 threads versus the Threadripper 9980X's 64 cores and 128 threads. This gives the EPYC a raw parallel processing advantage, but the Threadripper compensates with much higher clock speeds. The Threadripper's base clock is 3.20 GHz and its boost clock reaches 5.40 GHz, while the EPYC operates at a base of 2.55 GHz and boosts to only 3.70 GHz.

The cache hierarchy also differs in scale. Both processors have 64 KB of L1 cache per core and 1 MB of L2 cache per core. However, the L3 cache is where they diverge dramatically. The Threadripper 9980X has 256 MB of L3 cache, while the EPYC 9684X has a massive 1152 MB of shared L3 cache. This 4.5x difference in L3 capacity is a defining feature of the EPYC's design for server workloads.

The memory subsystems are also distinct. The Threadripper 9980X uses a quad-channel DDR5 memory bus with a bandwidth of 204.8 GB/s. The EPYC 9684X uses a twelve-channel DDR5 memory bus with a bandwidth of 460.8 GB/s. The EPYC's memory bandwidth is more than double, which is critical for data-heavy server applications.

Other architectural differences include the socket and PCIe lanes. The Threadripper 9980X uses AMD Socket sTR5 and provides 80 PCIe Gen 5 lanes from the CPU. The EPYC 9684X uses AMD Socket SP5 and provides 128 PCIe Gen 5 lanes. The Threadripper has an unlocked multiplier, making it overclockable, while the EPYC does not. The Threadripper also has a much lower thermal design power (TDP) of 350 watts, compared to the EPYC's 400 watts.

Head-to-Head Benchmarks

The benchmark results show a clear pattern of the Threadripper 9980X outperforming the EPYC 9684X in most tests, with the EPYC winning only in specific workloads. The most striking result is in the Cinebench suite, where the Threadripper wins all six tests by a consistent margin of 26.3%. In Cinebench R23 multi-core, the Threadripper scores 130529 against the EPYC's 103355. In Cinebench R23 single-core, the Threadripper scores 18427 against the EPYC's 14591. This consistent 26.3% advantage across both single and multi-core Cinebench tests indicates a fundamental per-core performance advantage for the Zen 5 architecture.

The PassMark single-thread test shows the largest gap, with the Threadripper scoring 4537 and the EPYC scoring 2891, a difference of 56.9% in favor of the Threadripper. This result is heavily influenced by the Threadripper's much higher boost clock of 5.40 GHz. In the PassMark extended instructions test, the Threadripper also wins by a substantial margin, scoring 228959 against the EPYC's 177956, a lead of 28.7%.

The Threadripper also wins in floating-point math, scoring 559003 versus the EPYC's 472174, an 18.4% lead. In integer math, the Threadripper wins by a smaller margin, scoring 872071 against 844145, a 3.3% lead. In data compression, the Threadripper scores 2974534 versus the EPYC's 2698807, a 10.2% advantage. In the multi-threaded PassMark test, the Threadripper scores 141641 versus 121595, a 16.5% lead.

The EPYC 9684X wins in four specific tests. The most significant is the PassMark physics test, where the EPYC scores 24686 against the Threadripper's 8001, a massive 67.6% lead for the EPYC. In the find prime numbers test, the EPYC scores 2020 versus the Threadripper's 769, a 61.9% lead. The EPYC also wins in random string sorting, scoring 349126 versus 292083, a 16.3% lead. Finally, in data encryption, the EPYC scores 178453 versus 157137, an 11.9% lead.

Specification Differences

The recorded data shows the following key differences between the two processors. The AMD Ryzen Threadripper 9980X has 64 cores and 128 threads, while the AMD EPYC 9684X has 96 cores and 192 threads. The Threadripper has a base clock of 3.20 GHz and a boost clock of 5.40 GHz, while the EPYC has a base clock of 2.55 GHz and a boost clock of 3.70 GHz. The Threadripper has a TDP of 350 watts, while the EPYC has a TDP of 400 watts.

The Threadripper 9980X uses the Zen 5 architecture on a 4 nm process, while the EPYC 9684X uses the Zen 4 architecture on a 5 nm process. The Threadripper uses 66,520 million transistors across a die size of 8x 70.6 mm², while the EPYC uses 135,240 million transistors across a die size of 12x 72 mm². The L3 cache is 256 MB for the Threadripper and 1152 MB for the EPYC.

The memory bus differs, with the Threadripper using quad-channel memory and the EPYC using twelve-channel memory. This results in memory bandwidth figures of 204.8 GB/s for the Threadripper and 460.8 GB/s for the EPYC. The PCIe lane count also differs, with the Threadripper providing 80 Gen 5 lanes and the EPYC providing 128 Gen 5 lanes.

The sockets are different, with the Threadripper on AMD Socket sTR5 and the EPYC on AMD Socket SP5. The Threadripper has an unlocked multiplier, while the EPYC does not. The market segments also differ, with the Threadripper listed as a desktop processor and the EPYC listed as a server/workstation processor. The release dates are different, with the Threadripper launching on July 29, 2025, and the EPYC launching on June 12, 2023.

Where Each One Wins

The AMD Ryzen Threadripper 9980X is the clear winner for tasks that depend on high clock speeds and per-core performance. The data shows it is substantially faster in single-threaded workloads, as evidenced by its 56.9% lead in the PassMark single-thread test and its 26.3% lead in all Cinebench single-core tests. This makes it the better choice for applications like 3D rendering, video editing, software compilation, and general desktop productivity, where individual core speed matters as much as core count. Its 13 benchmark wins out of 17 comparisons indicate it is the more versatile processor for most computing tasks. Its lower TDP of 350 watts also makes it more manageable for a desktop or workstation build.

The AMD EPYC 9684X wins in server-oriented workloads that leverage its massive core count, large L3 cache, and high memory bandwidth. The 67.6% lead in the PassMark physics test and the 61.9% lead in the find prime numbers test indicate that this processor excels at highly parallel, compute-intensive scientific simulations and mathematical operations. The 16.3% lead in random string sorting and the 11.9% lead in data encryption point to strengths in data processing and security-related tasks. The EPYC's 96 cores and 192 threads, combined with its 1152 MB L3 cache and 460.8 GB/s memory bandwidth, make it the superior choice for large-scale virtualization, database workloads, and high-performance computing clusters where parallel throughput is the primary goal.

The use-case split is clear. For a single-user desktop or workstation where responsiveness and per-core speed are paramount, the Threadripper 9980X is the better option. For a server environment running many concurrent threads, processing massive datasets, or performing scientific calculations, the EPYC 9684X is the stronger candidate. The overall average benchmark score reflects this, with the Threadripper 9980X averaging 321753 across all tests, while the EPYC 9684X averages 266914. The Threadripper also sits at the 99th percentile for all CPUs, same as the EPYC, but with a higher average score, placing it ahead of rivals like the AMD Ryzen Threadripper PRO 9985WX by 0.3% and the Intel Xeon 6781P by 2%. The EPYC 9684X, in turn, is 6.1% ahead of the Intel Xeon 6980P in its own comparison set.