Original Wholesale AMD EPYC 7643 EPYC 7663 48 Cores 96 Threads 225W 2.3GHz Server/workstation Processor

AMD EPYC 7643 – The Balanced High-Density Workhorse

Target Use Case: Enterprise virtualization, technical computing, and cloud workloads needing optimal core/clock balance

Key Specifications:

• 48 cores / 96 threads (Zen 3 architecture)

• 2.3GHz base / 3.6GHz boost clock speeds

• 256MB L3 cache (shared across 6 CCDs)

• 225W TDP (efficient for core count)

• 8-channel DDR4-3200 memory support

• 128 PCIe 4.0 lanes for expansive I/O

Performance Highlights:

• 9% faster single-thread performance vs 7663

• Ideal for workloads requiring both core density and clock speed

• Supports up to 4TB memory per socket

Best For:
✔ Virtualization environments (VMware, Hyper-V)
✔ Medium-core-count HPC workloads
✔ Cloud-native applications
✔ Database servers needing balanced performance

Power Efficiency:
Delivers 12% better performance-per-watt than 7663 in workloads that don’t scale perfectly to 56 cores.

AMD EPYC 7663 – The Ultimate Core Density Champion

Target Use Case: Maximum parallel processing for perfectly scaling workloads

Key Specifications:

• 56 cores / 112 threads (industry-leading count)

• 2.0GHz base / 3.5GHz boost clocks

• 256MB L3 cache (distributed across 7 CCDs)

• 240W TDP (15W higher than 7643)

• Same memory/PCIe support as 7643

Performance Advantages:

• 16.7% more cores than 7643

• 18% higher throughput in perfectly scaling workloads

• Dominates in:
  ▸ Render farms (Blender, Maya)
  ▸ Computational fluid dynamics
  ▸ Financial risk modeling
  ▸ Massive container deployments

Tradeoffs:

• Lower base clock (-15% vs 7643)

• Requires premium cooling solutions

• Best with workload-aware power management

Head-to-Head Comparison

Performance in Key Benchmarks: