AMD EPYC 9745 vs AMD Ryzen Threadripper 9970X Comparison

The Verdict

The benchmark data presents a stark division of labor between these two AMD processors. The AMD EPYC 9745 is a sheer throughput monster, winning 9 of 11 head-to-head comparisons with massive margins in heavily threaded workloads. The AMD Ryzen Threadripper 9970X, conversely, claims both single-thread tests with a decisive 38.1% advantage, revealing its strength in latency-sensitive and lightly threaded tasks.

The EPYC 9745 sits at the 100th percentile of all CPUs in the database, while the Threadripper 9970X ranks at the 99th percentile. This difference is small but meaningful: the EPYC is the absolute peak of the recorded performance distribution, whereas the Threadripper is just below that summit. The average benchmark score tells a similar story, with the EPYC 9745 reaching 425,973 versus 279,778 for the Threadripper, a 52.3% gap in aggregate performance.

For server administrators and data center planners, the EPYC 9745 is the obvious choice when raw parallel compute is paramount. Its 128 cores and 256 threads provide an overwhelming advantage in virtualization, database transaction processing, and scientific simulation workloads that scale across many threads. The Threadripper 9970X, with its 32 cores and 64 threads, is better suited for a professional workstation where a mix of single-thread responsiveness and moderate multi-thread capability is required, particularly for interactive content creation or engineering design tasks.

The data suggests these are not competitors in the traditional sense; they are complementary tools. The EPYC 9745 excels at grinding through massive parallel workloads, while the Threadripper 9970X offers superior responsiveness for tasks that cannot fully utilize dozens of cores. The choice depends entirely on whether the user's workload is dominated by parallelizable bulk compute or by individual thread performance.

FAQ

Q: Which processor has more cores and threads?

A: The AMD EPYC 9745 has 128 cores and 256 threads, while the AMD Ryzen Threadripper 9970X has 32 cores and 64 threads. The EPYC provides a 4x advantage in both core count and thread count.

Q: What is the single-thread performance difference?

A: The Threadripper 9970X scores 4,530 in the PassMark single-thread test, while the EPYC 9745 scores 2,806. This gives the Threadripper a 38.1% higher score, making it significantly more responsive for single-threaded applications.

Q: Which processor has the higher boost clock?

A: The Threadripper 9970X has a boost clock of 5.40 GHz, whereas the EPYC 9745 reaches 3.70 GHz. This clock advantage contributes directly to the Threadripper's single-thread superiority.

Q: How do the memory systems differ?

A: The EPYC 9745 uses a twelve-channel DDR5 memory bus with 576.0 GB/s bandwidth, while the Threadripper 9970X uses a quad-channel DDR5 bus with 204.8 GB/s. Both support ECC memory.

Q: What is the largest benchmark margin between the two?

A: The biggest single margin is in data encryption, where the EPYC 9745 scores 229,447 versus 86,765 for the Threadripper 9970X, a 164.4% advantage. Integer math follows closely at 163.1% (1,224,315 versus 465,378).

Q: Are both processors based on the same architecture?

A: Yes, both use the Zen 5 architecture from AMD, but they differ in process node and codename. The EPYC 9745 is built on a 3 nm node with the Turin codename, while the Threadripper 9970X uses a 4 nm node with the Shimada Peak codename.

Architecture Differences

The architectural divergence between these two processors begins with their physical design and extends into their intended operational environments. Both use the Zen 5 architecture, but the implementation details create distinct performance profiles.

The EPYC 9745, codenamed Turin, is fabricated on a 3 nm process at TSMC and belongs to the EPYC 9005 series. It features 128 cores and 256 threads, with a base clock of 2.40 GHz and a boost clock of 3.70 GHz. The cache hierarchy includes 80 KB of L1 per core, 1 MB of L2 per core, and a substantial 256 MB of shared L3 cache. This massive L3 allocation is designed to feed the enormous core count and reduce memory traffic in data-intensive server workloads. The EPYC uses AMD Socket SP5 and targets the server/workstation market segment, with a production status of active.

The Threadripper 9970X, codenamed Shimada Peak, uses a 4 nm process at the same foundry. It packs 32 cores and 64 threads, with a base clock of 4.00 GHz and a boost clock of 5.40 GHz. Its cache layout is different: 64 KB of L1 per core, 1 MB of L2 per core, and 128 MB of shared L3. The Threadripper also lists 33,260 million transistors across a die size of 4x 70.6 mm², details that are not recorded for the EPYC. It uses AMD Socket sTR5 and is classified as a desktop part.

The socket difference is fundamental: SP5 for the EPYC is a server platform, while sTR5 for the Threadripper is a high-end desktop workstation platform. This distinction influences motherboard design, memory topology, and PCIe lane allocation. The EPYC provides 128 PCIe Gen 5 lanes, while the Threadripper offers 80 PCIe Gen 5 lanes. The EPYC also has a twelve-channel memory bus versus quad-channel on the Threadripper, reflecting the server's need for massive memory bandwidth to feed 128 cores.

Specification Differences

The recorded specifications reveal several key differences between these two processors. Core count is the most obvious: 128 cores for the EPYC versus 32 for the Threadripper, with threads at 256 versus 64 respectively. Clock speeds differ significantly, with the Threadripper's base clock of 4.00 GHz exceeding the EPYC's 2.40 GHz, and the boost clock of 5.40 GHz versus 3.70 GHz.

The process node differs by one step: 3 nm for the EPYC versus 4 nm for the Threadripper. The cache sizes are also different, with the EPYC featuring 80 KB L1 per core versus 64 KB on the Threadripper, and 256 MB shared L3 versus 128 MB. The TDP ratings are 400 watts for the EPYC and 350 watts for the Threadripper.

Memory channels are another differentiator: twelve for the EPYC versus four for the Threadripper, with corresponding bandwidth figures of 576.0 GB/s versus 204.8 GB/s. PCIe lane counts differ at 128 versus 80, both Gen 5. The multiplier is unlocked on the Threadripper but locked on the EPYC, allowing overclocking on the desktop part. Release dates are also distinct, with the EPYC launching on 2024-10-09 and the Threadripper on 2025-07-29.

Head-to-Head Benchmarks

The benchmark results are overwhelmingly in favor of the EPYC 9745, but the nature of each win reveals important insights. The largest margin comes in data encryption, where the EPYC scores 229,447 against the Threadripper's 86,765, a 164.4% advantage. This indicates the EPYC's ability to handle cryptographic workloads with extreme parallelism, a critical feature for secure server operations.

Integer math shows a 163.1% lead for the EPYC (1,224,315 versus 465,378), while physics tests show a 150.5% advantage (17,122 versus 6,835). Floating point math follows with a 145.8% margin (761,219 versus 309,719), and random string sorting shows a 145% lead (468,975 versus 191,445). Data compression demonstrates a 123.5% advantage (3,929,890 versus 1,757,998), and extended instructions show a 97% lead (280,477 versus 142,342). Prime number finding is 59.2% higher on the EPYC (979 versus 615), while the multithread test shows a more modest 21.7% advantage (130,698 versus 107,399).

The only wins for the Threadripper 9970X come in the single-thread tests. Both PassMark single-thread and single-thread variants record a score of 4,530 for the Threadripper versus 2,806 for the EPYC, a 38.1% advantage. This is the sole category where the Threadripper demonstrates clear superiority, and it directly correlates with the higher clock speeds.

The average benchmark scores reinforce this pattern. The EPYC 9745 achieves an average of 425,973, which places it 3.4% ahead of the AMD Ryzen Threadripper PRO 9995WX, 7.1% ahead of the AMD EPYC 9655P, 12.3% ahead of the AMD EPYC 9535, and 14.1% ahead of the AMD EPYC 9655. The Threadripper 9970X, with its average of 279,778, sits nearly level with the Intel Xeon 6780E (0.2% behind), 2% behind the AMD EPYC 9565, 2.2% behind the Intel Xeon 696X, and 2.5% behind the AMD EPYC 9555P.

Where Each One Wins

The EPYC 9745 dominates in every multi-threaded category measured. Its 128 cores provide overwhelming parallel processing capability, making it the clear choice for server virtualization, large-scale database operations, data encryption at scale, scientific computing, and bulk data compression. The 164.4% lead in encryption and 163.1% lead in integer math are particularly notable, suggesting workloads that involve heavy arithmetic or cryptographic operations will see dramatic performance gains on the EPYC.

The data shows the EPYC also excels in memory-intensive tasks. With twelve-channel DDR5 support and 576.0 GB/s bandwidth, it can feed its massive core count without starvation. The 256 MB shared L3 cache further reduces memory latency for working sets that fit within this large on-die cache.

The Threadripper 9970X wins decisively in single-thread performance, with its 38.1% advantage in PassMark single-thread tests. This makes it the better choice for applications that are latency-sensitive or cannot parallelize effectively, such as certain legacy software, interactive design tools, or workloads with heavy sequential dependencies. The higher base and boost clocks (4.00 GHz and 5.40 GHz versus 2.40 GHz and 3.70 GHz) are the primary drivers of this advantage.

For workstation users, the Threadripper's unlocked multiplier offers additional flexibility for those who want to push performance beyond stock settings, a feature the EPYC lacks. The lower TDP of 350 watts versus 400 watts also makes the Threadripper easier to cool in a desktop environment, though the EPYC's server platform is designed for high-density cooling solutions.

The practical implication is clear: choose the EPYC 9745 for data center deployments where thread count and memory bandwidth are paramount, and choose the Threadripper 9970X for a professional workstation where single-thread responsiveness and moderate multi-thread capability are balanced. The benchmark data does not suggest one is universally superior; instead, it reveals two processors optimized for different corners of the computing landscape.