AMD EPYC 4585PX

The AMD EPYC 4585PX is a 16-core, 32-thread server/workstation processor from the EPYC 4005 series, built on the Zen 5 architecture (codename "Grado") and fabricated on a 4nm process at TSMC. It runs on AMD Socket AM5, supports dual-channel DDR5 memory with ECC, and offers 24 PCIe Gen 5 lanes from the CPU. With a 170W TDP, a boost clock of 5.70 GHz, and a shared 128MB L3 cache, this chip targets dense single-socket workloads where high clock speeds and large caches matter. The data shows it lands in the 98th percentile of all CPUs tested, with an average benchmark score of 100,819, placing it among the fastest workstation processors available.

Platform and Compatibility

The EPYC 4585PX uses AMD Socket AM5, the same socket as mainstream desktop Ryzen processors, but it is marketed for the server and workstation segment. This unusual pairing means the chip can drop into AM5 motherboards, though the platform’s memory support is limited to dual-channel DDR5, with a peak memory bandwidth of 89.6 GB/s. ECC memory is supported, which is critical for data-integrity-sensitive workloads. The processor also includes integrated Radeon Graphics, so no discrete GPU is strictly required for basic display output, though heavy graphics tasks would still need a dedicated card.

PCIe connectivity is provided via 24 Gen 5 lanes from the CPU itself, enabling high-speed NVMe storage and accelerators. The chip does not have a multiplier unlocked, so overclocking is not an option; the operating frequencies are fixed by AMD. The process node is 4nm, with a transistor count of 16,630 million spread across two 70.6 mm² dies. The cache hierarchy consists of 80 KB of L1 per core, 1 MB of L2 per core, and a large 128 MB shared L3 cache, which helps with workloads that reuse data across cores.

Upgrade path: since this is a Socket AM5 part, users can potentially move to other AM5 processors, but the EPYC 4585PX is a single-generation product. The 4005 series is active, and the chip was released on May 12, 2025. The part number is 100-000001561. The platform’s dual-channel memory bus is a notable limitation for a server chip, as many competing workstation platforms offer quad-channel or higher, but the high clock speeds and large L3 partially compensate.

Power and Thermals

The EPYC 4585PX has a TDP of 170W. This is a high-power envelope, requiring a robust cooling solution—likely a high-end air cooler or a liquid cooler—to sustain boost clocks under load. The 4nm process helps keep power density manageable, but the 5.70 GHz boost clock on 16 cores will generate significant heat. The data does not specify a cooler type, but the TDP class suggests that stock coolers from mainstream desktop AM5 are insufficient; a capable aftermarket cooler is implied. The chip’s active production status and 170W TDP indicate it is designed for sustained multi-threaded workloads, not short bursts. In a workstation chassis with adequate airflow, the 170W envelope is manageable, but it does limit small-form-factor builds.

Who Should Consider It

Benchmark results indicate this processor excels in both single-threaded and multi-threaded tasks. The Cinebench R23 multi-core score of 60,451 and single-core score of 8,534 show a strong balance. For content creation—such as video editing, 3D rendering, and software compilation—the 16 cores and 32 threads provide substantial parallel throughput. The PassMark multithread score of 71,552 and floating-point math score of 154,641 reinforce this. Data compression and encryption scores (893,899 and 49,374 respectively) suggest the chip is well-suited for database workloads, file servers, and security applications. The high single-thread score (PassMark single-thread 4,795) means that legacy or lightly threaded applications will still run responsively, which is often a weak point for many server chips.

Given its server/workstation market segment, the EPYC 4585PX is ideal for small to medium-sized businesses running virtualized environments, on-premises databases, or engineering simulations. It also fits into high-end desktop workstations where a single powerful CPU is preferred over a dual-socket setup. The integrated graphics and ECC support make it a practical choice for a headless server or a workstation that needs error-correcting memory. However, the dual-channel memory bandwidth (89.6 GB/s) may bottleneck memory-intensive tasks like large in-memory analytics, so those workloads might favor a chip with quad-channel support.

How It Compares

The nearest rival is the AMD Ryzen Threadripper PRO 9955WX, which has an average benchmark score of 100,227. The EPYC 4585PX edges it out by 0.6%, making the two essentially performance equivalents. The Threadripper PRO is a high-end workstation chip, and this margin is within noise.

The AMD EPYC 7513 is another rival, with an average score of 102,244. The EPYC 4585PX trails it by 1.4%. The 7513 is a Milan-based EPYC part, and the slight deficit suggests the 4585PX’s higher clock speeds do not fully offset the 7513’s larger core count (though the exact core count is not in the fact pack, the delta is clear).

The AMD Ryzen Threadripper PRO 5965WX scores 98,504 on average, which is 2.3% lower than the EPYC 4585PX. This older Threadripper part is clearly outclassed by the newer Zen 5 design.

Finally, the AMD EPYC 8324P has an average score of 103,329, putting the 4585PX 2.4% behind. The 8324P is a Siena-class EPYC, and the performance gap, while small, is consistent across the board.

Overall, the EPYC 4585PX sits in a tight cluster with these four rivals, with deltas ranging from -2.4% to +2.3%. It is not the absolute fastest in this group, but it is very close to the top, and its platform advantages (AM5 compatibility, integrated graphics) may tip the balance for some buyers.

Benchmark Performance

The EPYC 4585PX achieves an average benchmark score of 100,819, placing it in the 98th percentile of all CPUs. This is a remarkable result for a 16-core part. In Cinebench R23, the multi-core score is 60,451, while the single-core score is 8,534. The single-core figure is particularly high, indicating excellent per-thread performance. In Cinebench R20, the scores are 25,389 multi-core and 3,584 single-core. The R15 scores are 6,093 and 860, respectively.

PassMark results show a multithread score of 71,552 and a single-thread score of 4,795. The integer math score is 255,898, and floating-point math is 154,641. Data compression is 893,899, encryption is 49,374, and extended instructions score 67,572. The find prime numbers score is 514, and random string sorting is 98,839. Physics score is 7,140.

Comparing to the nearest rivals, the EPYC 4585PX is 0.6% ahead of the Threadripper PRO 9955WX, 2.3% ahead of the Threadripper PRO 5965WX, 1.4% behind the EPYC 7513, and 2.4% behind the EPYC 8324P. These deltas are all within a narrow band, meaning the 4585PX is competitive with each. The fact that it holds its own against higher-core-count EPYC parts (the 7513 and 8324P) suggests that its high clock speeds and large L3 cache are effective in many workloads. The 2.3% advantage over the 5965WX shows a clear generational improvement.

FAQ

Q: What is the launch MSRP of the AMD EPYC 4585PX?

A: The launch MSRP is $699.

Q: What socket does the EPYC 4585PX use?

A: It uses AMD Socket AM5.

Q: Does the EPYC 4585PX support ECC memory?

A: Yes, it supports ECC memory, and it uses dual-channel DDR5 with a bandwidth of 89.6 GB/s.

Q: What is the boost clock speed?

A: The boost clock is 5.70 GHz, with a base clock of 4.30 GHz.

Q: Does the processor have integrated graphics?

A: Yes, it includes Radeon Graphics.

Q: How many PCIe lanes does it provide?

A: It offers 24 PCIe Gen 5 lanes from the CPU.

Single-Thread vs Multi-Thread Behavior

The EPYC 4585PX demonstrates an unusual balance between single-thread and multi-thread performance. In Cinebench R23, the multi-core score of 60,451 is roughly 7 times the single-core score of 8,534, which is close to the ideal scaling for 16 cores (16 cores, 32 threads with SMT). This indicates that the multi-threaded performance scales almost linearly with core count, a sign of efficient power delivery and thermal management. The single-core score of 8,534 is exceptionally high for a server chip, surpassing many desktop parts. This means that lightly threaded tasks—such as single-threaded database queries, legacy applications, or interactive workloads—will feel snappy, not sluggish.

The PassMark single-thread score of 4,795 reinforces this. For workloads that rely on a few fast cores, the 4585PX will outperform many higher-core-count rivals that have lower clock speeds. Conversely, the multi-thread score of 71,552 shows that when all 32 threads are engaged, the chip delivers strong throughput. The large 128 MB L3 cache is likely a key factor in both single- and multi-threaded performance, as it reduces memory latency and increases effective bandwidth for cached data.

The split between single- and multi-thread behavior suggests the EPYC 4585PX is a versatile processor. It can handle both latency-sensitive, low-thread-count tasks and high-throughput parallel workloads without compromising either. This is a rare trait in the server space, where chips often favor one extreme. The 2.3% advantage over the Threadripper PRO 5965WX in average score likely comes from the combination of high clocks and modern architecture, while the slight deficit to the EPYC 7513 and 8324P may be due to those parts having more cores or a different memory configuration. Overall, the data paints a picture of a well-rounded CPU that excels in mixed workloads, making it a compelling choice for workstations that run a variety of applications throughout the day.