AMD EPYC 9825

The AMD EPYC 9825 is a 144-core server processor built on the Zen 5c architecture and manufactured on TSMC’s 3 nm process node. It occupies a specific niche in the EPYC 9005 series, designed for high-density, scale-out workloads where core count takes precedence over raw clock speed. The data shows a processor with a base clock of 2.20 GHz and a boost clock of 3.70 GHz, paired with a substantial 384 MB of shared L3 cache and a 390 W TDP. This analysis walks through the benchmark data, platform requirements, and workload fit based solely on the available specifications.

Benchmark Performance

The FACT PACK lists no individual benchmark scores, an average benchmark score of zero, and no nearest rivals with delta percentages. Consequently, a quantitative performance comparison against specific competing processors is not possible from this data. The percentile field indicates a score of 50, which places this CPU at the median of all CPUs in the database, but this figure is unaccompanied by any raw score or reference point. Without benchmark entries or rival deltas, the analysis must rely on the architectural specifications to infer relative performance characteristics.

The core configuration is the dominant factor: 144 cores and 288 threads represent the maximum thread count available in this data set. The base clock of 2.20 GHz is modest, but the boost clock of 3.70 GHz provides a 1.50 GHz headroom for single-threaded bursts. The 384 MB shared L3 cache is a defining feature, offering a massive pool for working sets that exceed the cache capacity of smaller processors. The memory bandwidth is listed at 576.0 GB/s, supported by a twelve-channel DDR5 memory bus, which is critical for feeding 144 cores in memory-intensive workloads.

Given the absence of direct scores, the interpretation hinges on the relationship between core count, clock speed, and cache. A processor with this many cores will excel in parallel throughput tasks, but its 2.20 GHz base clock suggests that lightly threaded workloads may not see the same per-core performance as a lower-core-count part with a higher base clock. The 50th percentile ranking indicates that this processor is neither at the top nor the bottom of the database, but this ranking is qualitative without a score to anchor it. The data shows a design optimized for consistent, high-throughput operation rather than peak single-thread speed.

Platform and Compatibility

The AMD EPYC 9825 uses the AMD Socket SP5, which is the platform standard for the EPYC 9005 series. The processor is built on the Zen 5 architecture with the codename "Turin," and it is produced by TSMC on a 3 nm process node. This process node is the most advanced listed in the FACT PACK, suggesting improved power efficiency relative to older nodes, although the 390 W TDP indicates that power consumption is still substantial given the core count.

Memory support is limited to DDR5, operating over a twelve-channel memory bus. This configuration yields a theoretical memory bandwidth of 576.0 GB/s, which is a high figure necessary to prevent memory starvation across 144 cores. ECC memory is supported, which is standard for server platforms where data integrity is paramount. The PCIe support is Gen 5 with 128 lanes available from the CPU, enabling high-bandwidth connectivity for accelerators, storage, and networking. The processor is not multiplier unlocked, meaning overclocking is not an option, which is typical for server parts where stability and sustained performance are prioritized over tuning.

The upgrade path is defined by the SP5 socket and the EPYC 9005 series generation. Since the processor is listed as active in production, it is a current-generation part. The memory bus is fixed at twelve channels, and the PCIe lanes are CPU-only, meaning that chipset-provided lanes are not included in the 128-lane count. The platform supports DDR5 memory exclusively, so any existing DDR4 infrastructure would require replacement. The release date is 2024-10-09, and the part number is 100-000000837. The launch MSRP is $13006, which is a high entry point reflecting the core count and platform capabilities.

Who Should Consider It

The workload profile for this processor is heavily skewed toward parallel, multi-threaded environments. The 144-core / 288-thread configuration is best utilized in server and workstation scenarios where tasks can be decomposed into many concurrent threads. This includes virtualization, where multiple virtual machines can each consume a subset of the available cores, and database workloads that benefit from massive parallel query execution. The 384 MB L3 cache is particularly valuable for in-memory databases or analytics workloads where the working set can reside in cache, reducing latency to memory.

For content creation, the processor would be suitable for rendering tasks, such as 3D animation or video encoding, where the render engine can scale across all available threads. The 576.0 GB/s memory bandwidth is a strong asset for these workloads, as they often involve streaming large data sets through the CPU. However, the base clock of 2.20 GHz means that single-threaded tasks, such as some legacy applications or lightly threaded photo editing filters, will not perform as well as they would on a processor with a higher base clock and fewer cores.

Office productivity and general desktop use are not the target for this part. The 390 W TDP and server-grade platform (SP5, DDR5, 128 PCIe lanes) are overkill for typical office workloads, which are often latency-sensitive and single-threaded. The data indicates that this processor is designed for throughput, not responsiveness in low-thread-count scenarios. The 50th percentile ranking suggests that it is not an outlier in either direction, but this ranking must be interpreted in the context of a database that includes consumer processors, where a 144-core server chip would rarely be compared directly.

How It Compares

The FACT PACK includes no nearest rivals, so a direct comparison with specific competing models is not possible. The analysis must therefore rely on the architectural details versus general knowledge of the market, but only the facts provided. The processor sits in the EPYC 9005 series alongside other SKUs that share the SP5 socket and Zen 5 architecture, but the specific core counts and clock speeds of those SKUs are not listed. The 50th percentile ranking is the only comparative metric available, and it places this CPU at the midpoint of the entire database, which includes a wide range of consumer and server processors.

Without rival names or delta percentages, there is no basis for stating that the EPYC 9825 is a certain percentage faster or slower than any other specific processor. The data shows a processor with a high core count and a moderate clock speed, which would logically position it ahead of lower-core-count parts in parallel workloads, but behind higher-clock parts in single-threaded workloads. The 384 MB L3 cache is a standout feature, but its impact on relative performance cannot be quantified without benchmark scores.

The absence of nearest rivals in the data means that any claim about competitive positioning would be speculative. The benchmarking section must remain silent on specific deltas, and the analysis is confined to the processor’s own specifications. The 576 GB/s memory bandwidth and 128 PCIe Gen 5 lanes are platform-level advantages that would be compared against rivals with similar server aspirations, but the data does not provide those rivals.

Single-Thread vs Multi-Thread Behavior

The split between single-thread and multi-thread performance is defined by the clock speeds and core count. The base clock of 2.20 GHz is the sustained frequency across all cores under full load, while the boost clock of 3.70 GHz is the maximum frequency for a single core under light load. This 1.50 GHz difference indicates that the processor can ramp up significantly for single-threaded tasks, but the sustained all-core operation will be closer to the base clock.

For multi-threaded workloads, the 144 cores are the primary asset. The processor can handle 288 threads simultaneously, which is a high number for parallel processing. The 384 MB L3 cache is shared across all cores, allowing each core to access a large pool of cached data, which reduces the need to fetch from memory. The twelve-channel memory bus and 576 GB/s bandwidth are designed to keep all cores fed with data, which is a common bottleneck in high-core-count processors.

For single-threaded workloads, the boost clock of 3.70 GHz is the relevant figure. This is not a high clock speed compared to consumer processors, but it is sufficient for tasks that are not heavily multi-threaded. The data suggests that the processor will be more effective in environments where the workload can be parallelized, as the base clock is relatively low. The 50th percentile ranking likely reflects a balance where the multi-thread performance is strong, but the single-thread performance is average relative to the rest of the database.

FAQ

Q: How many cores and threads does the AMD EPYC 9825 have?

A: The AMD EPYC 9825 has 144 cores and 288 threads.

Q: What is the base and boost clock speed of this processor?

A: The base clock is 2.20 GHz, and the boost clock is 3.70 GHz.

Q: What type of memory does it support, and what is the memory bandwidth?

A: It supports DDR5 memory over a twelve-channel bus, with a memory bandwidth of 576.0 GB/s. ECC memory is also supported.

Q: What socket does the EPYC 9825 use, and what is the PCIe configuration?

A: It uses AMD Socket SP5 and supports PCIe Gen 5 with 128 lanes available from the CPU.

Q: What is the L3 cache size on this processor?

A: The shared L3 cache is 384 MB, with 80 KB of L1 and 1 MB of L2 per core.

Q: When was the processor released, and what is its production status?

A: The release date is 2024-10-09, and the production status is listed as active.