AMD EPYC 7473X

The AMD EPYC 7473X is a 24-core, 48-thread server processor built on the Zen 3 architecture with 3D V-Cache, offering 768 MB of shared L3 cache. It targets high-throughput workloads, with a base clock of 2.80 GHz and a boost of 3.70 GHz. The launch MSRP is $3900. In aggregate benchmark scores, it lands in the 73rd percentile of all CPUs, with an average score of 14574.

Single-Thread vs Multi-Thread Behavior

The EPYC 7473X shows a pronounced split between its single-thread and multi-thread capabilities. In Cinebench R23, it scores 7113 in single-core and 50388 in multi-core. The corresponding R20 results are 2987 single and 21162 multi; R15 shows 716 single and 5078 multi. These numbers reveal a processor that scales extremely well across its 24 cores, but each core runs at a modest frequency (2.80 GHz base, 3.70 GHz boost). The single-thread scores are far lower than the multi-thread figures, indicating that the design prioritizes parallel throughput over per-thread speed. For real-world workloads, this means the chip will excel in heavily threaded tasks like rendering, simulation, and database queries, while single-threaded applications—such as legacy software or lightly threaded games—will see only moderate performance.

The 768 MB shared L3 cache is an unusual asset. It is far larger than what typical desktop processors carry, and it likely benefits workloads that repeatedly access large datasets, such as in-memory databases or cache-resident computation. However, the cache size does not compensate for the relatively low clock speeds in single-threaded contexts. The base clock of 2.80 GHz and boost of 3.70 GHz are conservative for a modern chip, and the single-thread Cinebench scores reflect that. In contrast, the multi-thread scores are among the highest recorded for any processor in the same benchmark family, which is consistent with a 24-core part that scales nearly linearly under full load.

The split between single- and multi-thread performance is not a flaw; it is a design choice. Server and workstation workloads often involve many concurrent threads, and the EPYC 7473X is built to handle those efficiently. The single-thread performance is adequate for management tasks, orchestration, and I/O handling, but it is not the primary strength. Users who run a mix of heavy parallel jobs and occasional single-threaded utilities will find the chip responsive enough, but those who depend on per-core speed—such as high-frequency trading or certain legacy applications—should look elsewhere.

Power and Thermals

With a TDP of 240, the EPYC 7473X demands a serious cooling solution. This is a high-power part, typical for a 24-core server chip on a 7 nm process. The multiplier is locked, so no user overclocking is possible; the chip runs at its stock clocks. The 7 nm process from TSMC helps manage power density, but the TDP figure is still substantial. In a server chassis, this translates to the need for robust airflow or liquid cooling in a workstation context. The lack of an unlocked multiplier means that thermal management relies on the platform's cooling design rather than user tuning.

The high TDP also has implications for power delivery. Motherboards for Socket SP3 are designed to handle such loads, but a typical consumer desktop power supply may not be suitable. The chip's power consumption is not user-adjustable, so the cooling solution must be sized to the stock TDP. In a dense server environment, this means careful planning of airflow and heat dissipation. The 7 nm process does not eliminate the need for effective cooling; it simply allows the chip to fit into a 240 TDP envelope while delivering 24 cores and 48 threads.

The locked multiplier is a notable limitation for enthusiasts. Unlike unlocked desktop parts, the EPYC 7473X cannot be overclocked via the clock multiplier. Users must rely on the platform's memory overclocking and power management features to extract additional performance. For a server part, this is expected; stability and reliability take precedence over overclocking headroom. The TDP of 240 is a fixed design point, and the cooling solution should be chosen accordingly.

Benchmark Performance

The average benchmark score of 14574 places the EPYC 7473X in the 73rd percentile among all CPUs. Compared to its nearest rivals, the deltas are tight: it is 0.3% slower than the Intel Core i5-9600K, 0.5% faster than the AMD Ryzen 3 4300G, 0.8% slower than the Intel Core i5-9500, and 1.7% faster than the AMD Ryzen Embedded V2546. These rivals have average scores of 14620, 14503, 14697, and 14336, respectively. The EPYC's aggregate score sits within a narrow band around these consumer and embedded parts, which is remarkable given the vast difference in core counts and intended use cases.

The aggregate score, however, masks the underlying performance distribution. In Cinebench R23, the multi-core score of 50388 is exceptional, while the single-core score of 7113 is unremarkable. The R20 and R15 results follow the same pattern: multi-core scores of 21162 and 5078, respectively, versus single-core scores of 2987 and 716. In any workload that scales across many threads, the EPYC 7473X will outperform these rivals by a wide margin. For example, a multi-threaded render or a database query that uses all cores would see a massive advantage over the i5-9600K or Ryzen 3 4300G, despite the near-identical aggregate scores. Conversely, in single-threaded tasks, the EPYC will trail those parts, which explains why the aggregate is so close.

The 73rd percentile ranking indicates that the EPYC is not the fastest in every scenario, but it is above average across all CPUs. The high multi-thread scores pull the average up, while the modest single-thread scores hold it back. For a server processor, this is a typical profile. The benchmark results suggest that the EPYC 7473X is best evaluated on its multi-thread performance, not on its aggregate or single-thread numbers. When compared to its nearest rivals, the deltas are small in aggregate, but the workload-specific differences are enormous.

Who Should Consider It

The EPYC 7473X is aimed squarely at server and workstation workloads. Its 24 cores and 48 threads, combined with 768 MB of L3 cache, make it a strong candidate for virtualized environments, in-memory databases, scientific computing, and heavy content creation such as 3D rendering or video encoding. The eight-channel DDR4 memory with 204.8 GB/s bandwidth provides ample memory throughput for multi-threaded data processing. The single-thread performance is adequate for general office tasks, but the chip's strength is in parallel execution.

For users who run single-threaded applications exclusively, a lower-core-count processor with higher clocks would be a better fit. However, for mixed workloads that can utilize many threads, the EPYC 7473X offers a unique combination of core count and cache size. The 73rd percentile overall ranking reflects that it is not the fastest in every scenario, but its multi-thread performance is exceptional. The support for ECC memory is a critical feature for data integrity in server environments, and the 128 PCIe Gen 4 lanes allow for extensive I/O expansion, making it suitable for storage servers, GPU compute nodes, and network appliances.

The chip is not designed for typical gaming. Its single-thread scores are modest, and the high TDP and server platform are not aligned with consumer gaming builds. That said, if a workload involves streaming or rendering while gaming, the multi-thread capability could be leveraged, but the platform cost and complexity make it impractical for most gamers. The EPYC 7473X is a specialist tool for professionals who need massive parallel throughput and large cache capacity.

Platform and Compatibility

The EPYC 7473X uses the AMD Socket SP3, the same platform as other EPYC 7003 series processors. It supports DDR4 memory across an eight-channel bus, with a theoretical bandwidth of 204.8 GB/s. The memory controller also supports ECC. For expansion, the CPU provides 128 PCIe Gen 4 lanes, which is a high count suitable for many NVMe drives, GPUs, and network adapters. The chip is part of the Milan-X family, based on the Zen 3 architecture and fabricated on TSMC's 7 nm process. The platform is mature, with a wide range of server motherboards available.

The launch MSRP is $3900, and the part number is 100-000000507WOF100-000000507. The production status is active, meaning it is currently available. The multiplier is locked, so performance tuning is limited to platform settings such as memory frequency and power limits. The Socket SP3 platform is shared with other EPYC 7003 series processors, allowing for a range of upgrade options within the same motherboard, though the specific power delivery and BIOS support must be verified. The eight-channel memory architecture requires DIMMs to be populated in matched sets to achieve full bandwidth, and the 204.8 GB/s figure assumes a fully populated configuration.

The PCIe Gen 4 support is a key advantage for modern accelerators and storage. The 128 lanes can be bifurcated to support multiple high-speed devices, making the EPYC 7473X suitable for dense compute nodes. The lack of an unlocked multiplier is a minor limitation, but for a server part, stability and compatibility are more important than overclocking. The platform also supports ECC memory, which is essential for error-sensitive workloads. Overall, the EPYC 7473X fits into a well-established ecosystem with broad motherboard and memory compatibility.

FAQ

Q: What is the TDP of the EPYC 7473X?

A: The TDP is 240.

Q: How much L3 cache does it have?

A: It has 768 MB of shared L3 cache.

Q: What memory bandwidth does it support?

A: The eight-channel DDR4 memory bus provides 204.8 GB/s of bandwidth.

Q: Is the multiplier unlocked?

A: No, the multiplier is locked.

Q: What is the average benchmark score and percentile?

A: The average benchmark score is 14574, placing it in the 73rd percentile of all CPUs.

Q: What socket does it use?

A: It uses AMD Socket SP3.