AMD EPYC 7443 24c/48t 2.85GHz-4.0GHz 128W (100-000000340)

AMD EPYC 7443 Server CPU

Positioning and role in the EPYC 7003 lineup

AMD EPYC 7443 is a 3rd Gen EPYC “Milan” processor positioned as a performance-per-watt–oriented 24-core SKU for enterprise and cloud servers. It sits between frequency-optimized F-series models and higher-TDP throughput parts, offering a balance of core count, clock speed, memory bandwidth, and power efficiency. Within the EPYC 7003 family, the 7443 is commonly selected for production environments where sustained performance, predictable behavior, and lower power envelopes are critical decision factors.

Core configuration, frequency behavior, and execution profile

The processor features 24 cores and 48 threads, operating at a 2.85 GHz base frequency with boost clocks up to 4.0 GHz. This clock profile allows EPYC 7443 to deliver strong all-core throughput while still providing competitive single-thread performance for mixed workloads. In practice, it performs well in environments where services scale across many threads but still include latency-sensitive components, such as enterprise applications, middleware layers, and virtualized infrastructure.

Zen 3 cores bring improved instructions-per-clock and better cache behavior compared to previous generations, helping the processor maintain stable performance under sustained and mixed load patterns.

Cache architecture and memory access characteristics

EPYC 7443 includes 128 MB of shared L3 cache, providing a balanced cache-to-core ratio for general-purpose server workloads. This cache size helps reduce memory access latency for frequently used data and improves consistency in virtualized and containerized environments.

The processor supports DDR4-3200 memory across 8 memory channels, which is a defining strength of the EPYC 7003 platform. With symmetric DIMM population, EPYC 7443 can deliver very high aggregate memory bandwidth per socket, making it suitable for memory-intensive applications, virtualization with high VM density, and data-processing workloads that rely on sustained memory throughput.

I/O capabilities and platform integration

EPYC 7443 supports PCI Express 4.0 with up to 128 lanes per socket. This extensive I/O capability allows system architects to deploy dense NVMe storage, high-speed network adapters, and additional controllers without external PCIe switches. As a result, the processor integrates well into storage-heavy, network-intensive, and software-defined infrastructure designs.

The CPU uses the SP3 socket and supports both single-socket and dual-socket server configurations, depending on platform validation. This flexibility enables deployment across a wide range of enterprise server designs, from efficient 1P systems to scalable 2P platforms.

Power characteristics and deployment considerations

EPYC 7443 is rated at 128 W TDP, which is relatively low for a 24-core server processor. This power envelope makes it well suited for dense rack deployments and environments where power efficiency and thermal headroom are important. With proper server-grade cooling, the processor can sustain predictable performance under continuous load while keeping operating costs under control.

Ideal use cases and selection guidance

EPYC 7443 is best suited for workloads that require a balanced mix of throughput, efficiency, and platform capability. Typical use cases include virtualization hosts with high VM density, cloud and hosting infrastructure prioritizing performance per watt, enterprise application and middleware servers, and memory-intensive workloads benefiting from 8-channel DDR4 bandwidth. It is an effective choice when workloads scale well across many cores and demand full EPYC memory and I/O capabilities, while keeping power consumption lower than higher-TDP alternatives.