Overclocking:
A lot of information has been circulated when the Ryzen 7000X3D processors were announced concerning overclocking. The most optimistic spoke of the possibility of overclocking the CCD not having the “3D V-Cache” and the most pessimistic of a complete limitation of overclocking. So what about it and do we have access to manual modifications at the level of the different cores for our Ryzen 7 7800X3D which only has a CCD associated with the “3D V-Cache”? Let’s cut to the chase, it’s locked again but!
Manualoverclocking via the multiplier coefficients is still locked and therefore impossible to change them via the AMD Ryzen Master software. If you want to push your processor, then you’ll need to enable the Curve Optimizer and Precision Boost Overdrive. However, if you look in the BIOS of our ROG Crosshair X670E Gene, there is a CPU profile called “Load X3D OC Profile”.
This profile will activate the ” Asynchronous ” mode which will allow the increase of the BCLK2 frequency without affecting the memory frequency. By default, the profile proposes an increase of the BCLK frequency to 103 MHz.
We tried to increase this BCLK as much as possible by playing with the CPU voltage in order to have a stable frequency. Finally we were able to increase it to 107 MHz. The frequency in single core goes from 5045 MHz by default to 5403 MHz allowing us to go from a score of 1796 points to 1951 points (gain of 8.6%).
Regarding the multi-core, we go from 4850/4875 MHz to 5150/5175 MHz and there, in Cinebench R23, the gain is 6%. But unfortunately, the CPU heats up a lot and we quickly reach 90°C despite our liquid cooling loop associated with a 480 mm radiator. Indeed, at the original frequencies, our 7800X3D already reaches a frequency of 70°C in multi-core. We will therefore need a good cooling solution.
