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AMD Zen 5 CPUs: Key Updates and Differences
Jul 19, 2024
AMD Zen 5 CPUs: Key Updates and Differences
Overview and Announcement
Release Date:
July 31st
Presented News:
Architecture, chipset differences, performance expectations
Press Conference:
Held by AMD in Los Angeles
Self-funded event:
Independent coverage by the presenting team
AMD Zen 5 Features
Key Highlights:
On-the-fly memory tuning, memory changes within Windows without reboot
New curve shaper, builds on curve optimizer
Zen 5 architecture, new chipsets
Memory Tuning:
Supported without needing a reboot
New Chipsets:
X870, X870E, B850, B840
Zen 5 Architecture:
Advanced over Zen 4
Thermal Improvements:
Improved thermal resistance by 15%
Architecture Changes
Instruction Execution:
Wider execution pipelines
Efficiency Gains:
Improved cache, expanded execution window
Fetch and Decode:
More instructions fed to back-end, dual-port instruction cache
Dispatch Engine:
8-wide dispatch, 6 ALUs
Data Cache:
Increased from 32KB (Zen 4) to 48KB (Zen 5)
Floating Point Enhancements:
Full 512-bit data path, 6 pipelines
IPC and Performance Uplift
16% Average Geomean Uplift:
Versus Zen 4
35% Single-Core Uplift:
AES XTS encryption
Performance Claims:
Benchmarked in Far Cry 6, Blender, Geekbench 5.4
Comparison with Competitors
Against Intel:
9900X vs 14900K shows AMD with significant performance gains
9700X vs 14700K also shows AMD performance advantage
Detailed comparisons in handbreak, gaming benchmarks
Socket Longevity and Platform Support
AM5 Socket:
Ensuring longevity up to 7 years
Platform Strategy:
Aligns with DDR5 and PCIe generations
Socket Comparisons:
Addressing AM4 vs AM5
Chipset Details
New Chipsets:
Differences between X870, X870E, B850, and B840
PCIe and USB Support:
Gen 5 graphics and NVMe requirements
B850:
Gen 4 graphics optional, drops some USB 3.2 support
B840:
Reduced to PCIe Gen 3, USB 3.2 at 10 GB/s, no CPU overclock support
AMD Engineering Team Insights
Mike Clark:
Chief Architect, interviews and discussions on Zen development
Platform Engineers:
Discussing hardware and software integration
Future CPU Generations
Zen 6 and Zen 7:
Built on foundation of Zen 5 improvements
Heterogeneous Cores:
Discussion about AMD's approach
Final Notes
AMD’s Strategic Goals:
Enhancing user experience, power efficiency
Next Steps:
Await further reviews and benchmarks close to the launch date
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Full transcript