Overclocker SkatterBencher today published a video in which he managed to overclock an AMD Ryzen 7 7800X3D processor to 5.4 GHz despite the chip’s overclocking limit. It successfully overcame AMD’s 5 GHz ceiling by using external clock generators to overclock the CPU cores.
Ryzen 7 7800X3D provides incredibly high performance in games thanks to 3D V-Cache. However, the thermal limitations of the technology force AMD to disable manual overclocking of the processor – only the automatic algorithms of Precision Boost Overdrive and AMD Curve Optimizer work.
SkatterBencher was able to work around this limitation with an Asus ROG Crosshair X670E Hero motherboard equipped with two external clock generators to aid in overclocking. To achieve 5.4GHz, SkatterBencher used a unique combination of several features, including an external clock generator, Precision Boost Overdrive, and AMD Curve Optimizer.
This overclocking strategy is complex, but its implementation is very effective. Precision Boost Overdrive is used to prevent chip power limitation. An external clock generator is used to physically increase the clock frequency, the curve optimizer is not used to lower the voltage, but to increase it above the standard values to maintain stability.
This resulted in a peak frequency of 5.4GHz on one core versus 4.85GHz on the other cores and a voltage well below 1.2V. This represents a 7.7% increase in overall frequency and a 10% increase per core.
The result of overclocking and its method are impressive, although the latter is only available on some boards. Time will tell how quickly the 7800X3D will degrade under overclocking, but at the time of overclocking everything was running stable. Clocked at 5.4GHz, the processor actually gets the processing power of the Ryzen 7 7700X, with an additional 3D V-Cache L3 for better gaming performance.
AMD Ryzen 7 7800X3D: high performance in games and moderate power consumption at a price of $450
Source: Tom’s Hardware
