Exploring the Zen 5 Advances From AMD - New Era of Smaller Cores and Sophisticated Dual CCX Chip Architecture Revealed
Break New Ground in CPU Performance with an AMD Ryzen #9700X: Overclocked to an Impressive 5.8GHz and Chilled by Premium AIO Liquid Cooling – Plus, a Surprising Idle Speed of 6 GHz Achieved
Overclockers have no time to get familiar with AMD’s Zen 5 CPU architecture and the newRyzen 7 9700X , which rivals thebest CPUs . Professional overclocker Skatterbencher has already figured out how to push the 9700X to 5.8 GHz in single-core workloads. Skatterbencher published ahighly in-depth overclocking tutorial showcasing the feat. But he’s not done yet. The overclocker also revealed that he successfully hit 6 GHz on the 9700X with traditional AIO liquid cooling.
To achieve this high frequency, SkatterBencher used all of AMD’s overclocking-friendly tools, including EXPO, Precision Boost Overdrive 2, Curve Optimizer, the all-new Curve Shaper, and external clock generators virtually.
The tutorial reveals that the biggest hurdle to overcome was the Ryzen 7 9700X’s Fmax (frequency max) limit of 5,550 MHz (5.55 GHz) to achieve 5.8 GHz. Fmax is an artificial limitation in Ryzen CPUs that prevents the CPU from reaching higher frequencies, even if it has headroom. To achieve 5.8 GHz, SkatterBencher had to use PBO2 to raise the Fmax ceiling by 200 MHz from 5.55 GHz to 5.75 GHz — 200 MHz is the maximum offset you can apply with PBO2.
SkatterBencher used an external clock generator to trick the 9700X into running at a higher frequency to get the rest of the way. An external clock of 104.3 MHz allowed him to unlock the 5.8 GHz frequency range.
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Ryzen 7 9700X Undervolt & Overclock to 5860 MHz | SkatterBencher #78 - YouTube
To get the core(s) to boost up to that frequency, SkatterBencher used a combination of AMD’s Curve Optimizer and Curve Shaper to undervolt the CPU and enable PBO2, which increases the amount of power the CPU can consume. Undervolting on Ryzen CPUs gives them more headroom, allowing them to hit higher frequencies without running into other limitations such as voltage, power, or thermal limits.
SkatterBencher also revealed that theRyzen 9000 is heavily voltage-limited, featuring a peak VID limit of 1.4V for single core and 1.35V for multi-core. To help alleviate this problem, the overclocker utilized a PBO2 scalar preset 10X to boost the multi-core maximum voltage to 1.375V, enabling the chip to use more voltage to turbo higher than it previously would.
With all these technologies working in tandem, the overclocker achieved an idle frequency of 5.86 GHz. In stress testing, the maximum single-thread clock speed was 5.758 GHz, with a maximum multi-core frequency of 5.454 GHz operating at 95.2 degrees Celsius at a package power of 172.1 watts.
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SkatterBencher’s 5.8 GHz and 6 GHz overclocks represent the highest on the new 9700X. Der8auer and Overclocking.com showcased their respective overclocks on the 9700X but could only eke out 5.4G Hz. The main difference was that both outlets did manual overclocks, whereas SkatterBencher used AMD’s plethora of overclocking tools, enabling them to hit higher frequencies.
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- Title: Exploring the Zen 5 Advances From AMD - New Era of Smaller Cores and Sophisticated Dual CCX Chip Architecture Revealed
- Author: George
- Created at : 2024-08-19 03:56:47
- Updated at : 2024-08-20 03:56:47
- Link: https://hardware-tips.techidaily.com/exploring-the-zen-5-advances-from-amd-new-era-of-smaller-cores-and-sophisticated-dual-ccx-chip-architecture-revealed/
- License: This work is licensed under CC BY-NC-SA 4.0.