AMD EPYC 7451

AMD EPYC 7451 is a 24-core, 48-thread server processor built on AMD's first-generation Zen architecture, code-named Naples. It consistently places in the 65th percentile of all CPUs tested, indicating solid mid-pack performance that is competitive with several high-end Intel workstation and server parts from different eras. The benchmark results show a processor that excels in heavily threaded workloads while its single-thread performance, though acceptable, is not its primary strength.

Benchmark Performance

The EPYC 7451's average benchmark score is 5915, placing it in the 65th percentile of all CPUs. This score puts it in a tight cluster with several notable rivals, with performance deltas of less than 2% in every comparison. In Cinebench R23, the processor scores 20450 in multi-core and 2887 in single-core. The multi-core result is the headline figure, demonstrating strong scaling across its 24 physical cores.

The data shows a clear picture of a multi-threaded powerhouse. The Cinebench R15 multi-core score of 2061 and R20 multi-core score of 8589 confirm this trend across different versions of the benchmark. The single-core scores in the same tests—290 in R15, 1212 in R20, and 2887 in R23—are comparatively modest, reflecting the Zen architecture's focus on throughput rather than raw single-thread speed. The processor sits within 1.1% of its closest rivals in average score, meaning that for most applications, the differences between these CPUs are negligible. The EPYC 7451 is essentially neck-and-neck with the Intel Core i5-14450HX, trailing by just 0.3%, and the Intel Core i9-9920X, trailing by 0.6%.

Power and Thermals

The EPYC 7451 carries a TDP of 180 watts. This is a high-power classification typical of server processors designed for sustained, heavy workloads in data center environments. The 180W TDP implies that a robust cooling solution is required—specifically, a high-end tower air cooler or a liquid cooler capable of dissipating substantial heat. Standard stock coolers or low-profile units will not suffice for prolonged all-core loads.

This power draw is a direct consequence of the 24-core configuration on a 14nm process node from GlobalFoundries. The 4,800 million transistors on a 213 mm² die generate significant thermal output under load. The architecture is not designed for power efficiency at low loads; it is engineered for maximum multi-threaded performance, accepting the thermal consequences. The 180W TDP places it in a class where system builders must plan for adequate airflow and robust VRM cooling on the motherboard to maintain stable operation.

Single-Thread vs Multi-Thread Behavior

The benchmark data reveals a stark contrast between single-thread and multi-thread performance. The Cinebench R23 single-core score of 2887 is roughly 14% of the multi-core score of 20450. This ratio is typical of high-core-count server processors from the Zen generation. The architecture prioritizes core count over clock speed, with a base clock of 2.30 GHz and a boost clock of 3.20 GHz. These clock speeds are modest compared to consumer desktop parts, but the sheer number of cores compensates in parallel workloads.

For real-world applications, this split means the EPYC 7451 is exceptional for tasks that scale with core count—such as 3D rendering, video encoding, scientific simulations, and database transactions. Conversely, applications that rely heavily on single-thread performance, like legacy software or certain game engines, will not see the same benefits. The processor will still handle these tasks, but its performance will be more in line with mid-range consumer CPUs rather than the top-tier parts. The 48 threads provide immense parallelism, making the processor ideal for virtualized environments and multi-tenant server workloads where many concurrent tasks are the norm.

How It Compares

The EPYC 7451's average score of 5915 places it in a tightly contested field. The data shows four nearest rivals, each within a 1.6% performance delta.

Intel Core i5-14450HX: This mobile processor scores 5935, which is 0.3% higher than the EPYC 7451. The performance difference is effectively a statistical tie. The i5-14450HX achieves this with fewer cores and a much lower TDP, highlighting the architectural efficiency gap between newer and older process nodes. For a system builder, this means the EPYC 7451 offers similar average performance but at a significantly higher power draw.

Intel Core i9-9920X: Scoring 5949, this high-end desktop processor is 0.6% ahead of the EPYC 7451. The i9-9920X is a comparable part in terms of core count and positioning, but it belongs to a different era of Intel's HEDT lineup. The performance delta is negligible, meaning that for multi-threaded tasks, the two processors are interchangeable in terms of raw speed. The EPYC 7451, however, offers a server-grade platform with features like eight-channel memory.

Intel Xeon W-2170B: This workstation processor scores 5982, placing it 1.1% ahead of the EPYC 7451. The Xeon W-2170B is a direct competitor in the workstation segment. The 1.1% lead is within the margin of error for most real-world applications. The decision between these two would come down to platform features and memory bandwidth rather than raw CPU performance.

Intel Xeon E-2388G: Scoring 5820, this processor is 1.6% behind the EPYC 7451. The E-2388G is a single-socket server chip with a higher clock speed but fewer cores. The 1.6% deficit in average score is small, but the EPYC 7451's advantage lies in its 24-core, 48-thread configuration, which provides more headroom for heavily threaded workloads and virtualization.

Who Should Consider It

The EPYC 7451 is best suited for workloads that leverage its 24 cores and 48 threads. Benchmark results indicate that the multi-core Cinebench scores are its dominant strength. Content creators working with 3D rendering, video transcoding, or complex visual effects will see substantial performance in these tasks. The high multi-thread scores suggest that render times will be significantly reduced compared to lower-core-count processors.

Server administrators and IT professionals running virtualized environments will also benefit. The 48 threads allow for many concurrent virtual machines, and the eight-channel memory support provides ample bandwidth for memory-intensive database applications. The 170.6 GB/s memory bandwidth is a key advantage for workloads that are memory-bound.

Gamers should not consider this processor. The single-thread scores are modest, and the 180W TDP requires expensive cooling and power delivery solutions. The EPYC 7451 is a purpose-built server and workstation part, not a gaming CPU. For users with workloads that primarily rely on single-thread performance, such as office applications or light web browsing, this processor is overkill and would not provide a noticeable benefit over a more modestly configured system.

FAQ

Q: What is the average benchmark score for the AMD EPYC 7451?

A: The average benchmark score is 5915, placing it in the 65th percentile of all CPUs.

Q: How does the EPYC 7451 compare to the Intel Core i9-9920X?

A: The EPYC 7451 trails the Intel Core i9-9920X by 0.6% in average benchmark score, making the performance difference negligible.

Q: What is the TDP of the EPYC 7451?

A: The TDP is 180 watts, requiring a high-end cooling solution for sustained operation.

Q: Does the EPYC 7451 support ECC memory?

A: Yes, the processor supports ECC memory and features an eight-channel DDR4 memory bus.

Q: What is the boost clock speed of the EPYC 7451?

A: The boost clock speed is 3.20 GHz, with a base clock of 2.30 GHz.

Q: What socket does the EPYC 7451 use?

A: The processor uses the AMD Socket SP3.

Platform and Compatibility

The AMD EPYC 7451 is built for the AMD Socket SP3 platform, which is exclusive to the EPYC server lineup. The processor is based on the Zen architecture and is part of the EPYC 7001 series, code-named Naples. The platform supports DDR4 memory across an eight-channel memory bus, providing a maximum memory bandwidth of 170.6 GB/s. ECC memory is supported, which is essential for server reliability and data integrity.

The processor provides PCIe Gen 3 connectivity, which is the standard for the 2017-era platform. This means that while it will work with modern PCIe Gen 4 and Gen 5 devices, they will operate at the lower Gen 3 bandwidth. The platform does not include integrated graphics, so a discrete GPU is required for display output. The processor is fully unlocked, allowing for multiplier adjustments, although this is less relevant in a server context where stability is paramount.

The upgrade path is limited to the EPYC 7001 series, as the SP3 socket was replaced by subsequent generations. Users are restricted to the same family of processors, which means that upgrading to a newer architecture would require a new motherboard and platform. The production status is listed as active, but the platform is from 2017, so new system builds would be based on older technology. The memory bandwidth and core count remain competitive, but the platform's lack of PCIe Gen 4 or Gen 5 support is a notable limitation for future-proofing.