AMD EPYC 7773X 64c/128t 2.2GHz-3.5GHz 280W (100-000000504)

AMD EPYC 7773X Server CPU

Positioning within the EPYC 7003 lineup

AMD EPYC 7773X is a 3rd Gen EPYC “Milan” processor from the X-series featuring AMD 3D V-Cache technology. It is engineered for enterprise and technical workloads where cache capacity and memory-latency reduction have a greater impact on performance than raw clock speed. Within the EPYC 7003 family, the 7773X represents the highest tier for cache-sensitive workloads that repeatedly operate on very large working sets.

Core configuration and execution profile

The processor provides 64 cores and 128 threads, operating at a 2.2 GHz base frequency with boost clocks up to 3.5 GHz. Compared with frequency-optimized F-series models, the EPYC 7773X runs at more conservative clock speeds by design. This trade-off allows AMD to integrate an extremely large cache without compromising stability or power efficiency in sustained workloads.

In real deployments, EPYC 7773X performs best in scenarios where execution time is dominated by memory access patterns, cache misses, and data locality rather than pure compute throughput. Applications that frequently revisit large datasets can see significant gains when those datasets reside in cache instead of DRAM.

3D V-Cache architecture and performance impact

The defining feature of EPYC 7773X is its 768 MB of L3 cache, enabled by AMD’s 3D V-Cache stacking technology. This dramatically increases the amount of data that can be served at cache latency, reducing memory round trips and smoothing performance under heavy load.

Workloads that commonly benefit from this cache profile include large relational and analytical databases, in-memory and hybrid database engines, electronic design automation and simulation, and scientific computing and modeling with localized access patterns. When the active working set fits largely within cache, the performance uplift can be substantial, especially in latency-sensitive or iterative workloads.

Memory subsystem behavior

EPYC 7773X supports DDR4-3200 memory across 8 memory channels, consistent with the EPYC 7003 platform. While the massive L3 cache reduces pressure on main memory for many workloads, correct memory configuration remains essential. Balanced DIMM population and sufficient capacity help avoid cache thrashing and ensure predictable performance during long-running production workloads.

The combination of large cache and high aggregate memory bandwidth makes EPYC 7773X particularly effective for data-intensive workloads running continuously in enterprise environments.

I/O capabilities and platform integration

The processor supports PCI Express 4.0 with up to 128 lanes per socket, enabling dense NVMe storage configurations, high-speed networking, and accelerator connectivity without external PCIe switches. This allows system architects to build data-heavy platforms that combine fast storage access with extreme cache capacity in a single node.

EPYC 7773X uses the SP3 socket and supports dual-socket configurations, enabling systems with very high aggregate cache, memory capacity, and I/O bandwidth for demanding enterprise and technical workloads.

Power envelope and operational considerations

EPYC 7773X is rated at 280 W TDP, reflecting the power requirements of its cache-heavy design and high core count. Adequate server-grade cooling and airflow are required to maintain stable operation under sustained load. In properly engineered platforms, the processor delivers consistent and predictable performance for workloads that would otherwise be limited by memory latency.

Ideal use cases and selection guidance

EPYC 7773X is best suited for environments where maximum cache capacity directly translates into measurable performance gains. Typical use cases include database platforms with large indexes and working sets, analytics and query-heavy enterprise systems, simulation and modeling workloads, and high-value compute environments where performance consistency is critical. For general-purpose virtualization or purely throughput-oriented workloads, non-X EPYC models may offer better cost efficiency. EPYC 7773X should be selected when profiling clearly shows cache misses and memory latency as primary performance bottlenecks.