AMD Ryzen Threadripper PRO 9985WX

The AMD Ryzen Threadripper PRO 9985WX is a 64-core, 128-thread workstation processor built on the Zen 5 architecture (codename Shimada Peak) and manufactured on TSMC's 4 nm process. It carries a base clock of 3.20 GHz and a boost clock of 5.40 GHz, with a 350 W TDP. The chip occupies the AMD Socket sTR5 platform, supports eight-channel DDR5 memory with a bandwidth of 409.6 GB/s, and provides 128 PCIe Gen 5 lanes from the CPU. It holds a 100th-percentile ranking among all CPUs in the benchmark database, with an average benchmark score of 318888. This analysis examines its performance characteristics, positioning against nearest rivals, and suitability for various workloads.

Single-Thread vs Multi-Thread Behavior

The Threadripper PRO 9985WX demonstrates a dramatic split between single-thread and multi-thread performance. In Cinebench R23, it scores 18756 points in single-core and 132859 points in multi-core. The multi-core figure is nearly an order of magnitude higher, reflecting the scaling across 64 cores. Similarly, Passmark reports a single-thread score of 4586 and a multithread score of 156305. This gap is typical of high-core-count workstation processors, but the absolute single-core numbers are not negligible—they indicate that even lightly threaded tasks will run at respectable speeds.

For real workloads, this means the 9985WX excels in heavily parallel tasks such as 3D rendering, video encoding, scientific simulation, and data analysis. The Cinebench R20 multi-core score of 55800 and R15 multi-core score of 13392 further reinforce its dominance in threaded applications. Conversely, single-thread-bound tasks like some legacy software, certain game engines, or lightweight office applications will not utilize the full potential of the chip. The Passmark physics score of 19284 and integer math score of 888032 suggest strong performance in physics simulations and general arithmetic, but the single-thread score of 4586 indicates that a high-frequency desktop CPU might outperform it in strictly serial workloads. The data implies that the 9985WX is optimized for throughput over latency, a typical trade-off for server and workstation processors.

How It Compares

The nearest rivals in the benchmark database are four AMD EPYC processors. Each comparison uses the average benchmark score and the percentage delta relative to the 9985WX.

Against the AMD EPYC 9575F, the 9985WX holds a 1.6% advantage in average score. The EPYC 9575F averages 313982 points, while the 9985WX sits at 318888. This is a marginal lead, indicating near-parity in overall performance, though the 9985WX edges ahead in the aggregate.

The AMD EPYC 9734 averages 310619 points, putting the 9985WX 2.7% ahead. This is a slightly larger margin, but still within a narrow band. Both EPYC parts are high-core server chips, so the 9985WX’s advantage suggests a modest but consistent performance uplift.

The AMD Ryzen Threadripper 9980X, a sibling in the same Threadripper family, averages 344569 points—7.5% higher than the 9985WX. This is the only rival that outperforms the 9985WX in the list. The 9980X likely benefits from higher clock speeds or a different core configuration, though the exact specifications are not provided.

The AMD EPYC 9555P averages 291664 points, and the 9985WX leads by 9.3%. This is the largest gap among the four rivals, indicating that the 9985WX delivers substantially higher aggregate performance than this particular EPYC model.

Benchmark Performance

The benchmark results reveal a processor that sits at the top of the database, with a 100th-percentile rank. The average benchmark score of 318888 places it above three of its four nearest rivals, with only the Threadripper 9980X ahead. The deltas are small against the EPYC 9575F (1.6% lead) and EPYC 9734 (2.7% lead), but more pronounced against the EPYC 9555P (9.3% lead). The 7.5% deficit to the 9980X is notable, suggesting that within the Threadripper PRO line, there is a performance tier above the 9985WX.

In specific benchmarks, the Cinebench R23 multi-core score of 132859 is a strong indicator of rendering capability. The Passmark multithread score of 156305, along with data compression at 2851752 and floating-point math at 538413, point to excellent throughput in data-intensive and scientific workloads. The encryption score of 169124 and extended instructions score of 204637 highlight robust cryptographic and SIMD performance. The prime number finding score of 1196 is comparatively low, but that benchmark often scales poorly with core count due to memory latency. The random string sorting score of 352614 shows strong sorting performance, and integer math at 888032 is impressive.

The single-thread performance, while not the primary focus, is still competitive. The R23 single-core score of 18756 and Passmark single-thread score of 4586 are above many desktop processors, but the 64-core design means that single-thread workloads will not saturate the chip. The data suggests that the 9985WX is a purpose-built multi-threaded powerhouse, and its single-thread scores are sufficient for general use but not its selling point.

Who Should Consider It

Given its performance profile, the 9985WX is ideal for professionals who run multi-threaded applications that can use 64 cores and 128 threads. Video editors working with high-resolution footage, 3D artists rendering scenes, and engineers running simulations will see near-linear scaling. The Cinebench R23 multi-core score of 132859 and Passmark multithread score of 156305 indicate that rendering times will be dramatically shorter than on lower-core-count CPUs. Data scientists and researchers using Python, R, or MATLAB for heavy computations will benefit from the integer math score of 888032 and floating-point math score of 538413.

For gaming, the single-thread score of 4586 (Passmark) and R23 single-core of 18756 are respectable, but the 9985WX is not optimized for gaming. Most games rely on a few fast cores, and the 350 W TDP and workstation-focused design make it a poor fit for a gaming rig. Office applications and general productivity will run fine, but the chip's massive core count is overkill for such tasks. The 9985WX is best suited for workstation and server environments where every core can be kept busy. Its 128 PCIe Gen 5 lanes and eight-channel memory support also make it a strong candidate for large-scale data processing and virtualization.

Power and Thermals

The 9985WX has a TDP of 350 W, which classifies it as a high-power processor. This TDP figure indicates that a robust cooling solution is mandatory. Air coolers designed for high-end desktop CPUs may struggle to dissipate the heat generated under sustained load. A liquid cooling solution, ideally a custom loop or a high-performance all-in-one unit, is recommended to maintain stable operation. The 4 nm process node from TSMC helps with efficiency, but the sheer number of cores means that thermal density is high. The die size of 8x 70.6 mm² and transistor count of 66,520 million further underscore the complexity. Users should plan for a chassis with excellent airflow and a cooling system capable of handling 350 W of heat output.

Platform and Compatibility

The 9985WX uses the AMD Socket sTR5, which is specific to the Ryzen Threadripper PRO line. It supports DDR5 memory in an eight-channel configuration, with a maximum bandwidth of 409.6 GB/s. ECC memory is supported, which is critical for error-sensitive workloads in scientific and financial computing. The processor provides 128 PCIe Gen 5 lanes from the CPU, enabling massive parallel expansion for GPUs, NVMe storage, and high-speed networking. The multiplier is unlocked, allowing overclocking, though the high core count and power draw may limit practical overclocking headroom. There is no integrated graphics, so a discrete GPU is required for display output. The platform is designed for workstations and servers, not consumer desktops, so users must choose compatible motherboards with the sTR5 socket.

FAQ

Q: What is the launch MSRP of the AMD Ryzen Threadripper PRO 9985WX?

A: The launch MSRP is $7999.

Q: How much L3 cache does the 9985WX have?

A: It has 256 MB of shared L3 cache, plus 64 KB L1 and 1 MB L2 per core.

Q: Does the 9985WX support ECC memory?

A: Yes, ECC memory is supported.

Q: What is the memory bandwidth of the 9985WX?

A: The eight-channel DDR5 memory interface delivers a bandwidth of 409.6 GB/s.

Q: Is the 9985WX overclockable?

A: Yes, the multiplier is unlocked, allowing overclocking.

Q: What socket does the 9985WX use?

A: It uses the AMD Socket sTR5.

Q: Does the 9985WX have integrated graphics?

A: No, there is no integrated graphics; a discrete GPU is required.