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AMD Zen4 powered Ryzen 7000 CPU teased to offer an overall performance increase of 35%

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At Computex 2022, AMD CEO Lisa Su teased the Ryzen 7000 CPUs with a Zen 4 teaser, but the announcement that the processors will only offer an ‘only’ >15 per cent gain in single-threaded performance left several enthusiasts disappointed. During Financial Analyst Day 2022, AMD clarified that the Zen 4 processors will have an improvement in IPC of 8 to 10%, with bigger benefits in single-threaded performance in some workloads.

AMD also stated that Zen 4 processors would enhance performance per watt by more than 25% and overall performance by more than 35%. The Zen 4 processors will also have considerable clock frequency enhancements, which isn’t surprising given that the company has already demonstrated a Ryzen 7000 processor that runs at 5.5 GHz on all cores (albeit not with all cores under load). The memory bandwidth per core on Zen 4 will be increased by up to 25%.

After the original reveal, AMD’s Zen 4 disclosures assist clarify the company’s performance expectations. Single-threaded performance is a combination of frequency and the all-important IPC (instruction per cycle) throughput, and the relatively low single-threaded performance threshold didn’t seem to leave much room for IPC improvement. 

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AMD’s original projections of a >15 per cent improvement in single-threaded work caused some consternation because single-threaded performance is a combination of both frequency and the all-important IPC throughput, and the relatively low single-threaded performance threshold AMD’s statement, though, that the IPC improvement will vary from 8 to 10% depending on workload, is a little more reassuring.

When you factor in the company’s claims of considerable frequency enhancements for the 5nm Zen 4 CPUs, we should see much larger benefits in single-threaded performance in various applications than the baseline 15% gain — remember, >15 per cent is a “more than” value.

In a multi-threaded Cinebench benchmark, AMD showed a greater than 25% increase in performance-per-watt and a more than 35% increase in overall performance

The 16-core 32-thread Ryzen 7000 desktop PC processor was pitted against the 16-core Zen 3 Ryzen 9 5950X in this test. Keep in mind that the slide is a little misleading because it employs a non-zero axis that increases the gain.

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The Zen 4 processors will also allow up to 25% greater memory capacity per core, thanks to a combination of the switch to DDR5 and possibly expanded pathways in the silicon to give more bandwidth to the cores. The bandwidth-hungry AVX-512 enhancements that AMD added for Zen 4 will benefit greatly from this.

also read:

China’s Loongson plans to manufacture its CPUs that will rival AMD’s Zen 3 by 2023

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Nivedita Bangari
Nivedita Bangari
I am a software engineer by profession and technology is my love, learning and playing with new technologies is my passion.

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