MSI PBO BCLK Booster to AM5 800-series MAX boards delivers 3% higher performance in Booster 1 setting
MSI has briefed some media on a new BIOS feature called PBO BCLK Booster for AM5 800-series MAX motherboards. The option takes advantage of the external clock generators on these boards and will also be available on the B850MPOWER and MEG X870E GODLIKE models.
PBO BCLK Booster exposes two preset profiles in the BIOS: Booster 1 and Booster 2 . On a Ryzen 7 9800X3D, MSI sets the base clock to 103 MHz in Profile 1 and 105 MHz in Profile 2, with CPU voltage left on Auto. The feature sits under AMD Overclocking -> Precision Boost Overdrive in Click BIOS X and can run together with X3D Gaming Mode and DDR5 tuning presets.
Source: MSI/Wccftech (newer slide)
To get a better understanding of the feature, we include an older chart from MSI for their flagship X870E GODLIKE motherboard. Back then this feature wasn’t even called PBO BCLK Booster, but just CPU Clock OC . They showed that boosting the clock generator to “106” would deliver 5% to 8% higher performance in some games.
Source: MSI (older slide)
The newer chart from Wccftech shows PBO settings, apparently in 1.0 mode and combined with memory tuning. Memory tuning aside (and the 15% performance boost claim aside), we are looking at an average 3% increase through BCLK adjustment alone. We are only guessing this is Booster 1.0 mode, because neither the slide nor Wccftech confirms it.
Source: MSI/Wccftech (newer slide)
The new feature is already present in beta form in AGESA 1.2.0.3G firmware for selected 800-series MAX boards, with a wider rollout planned alongside AGESA 1.2.7.0. For users who do not want to spend time on manual tuning, PBO BCLK Booster effectively brings MSI’s earlier OC Engine concept into a simple one-click profile for Ryzen 7000 and Ryzen 9000 CPUs.
Source: Wccftech
