Advanced thermal control for AMD Ryzen 7000 series processors in ASUS ROG, TUF Gaming, ProArt and Prime AM5 motherboard lines.
This latest CPU pushes the performance envelope further than ever before. They use dynamically available thermal headroom to allow users to run at higher clock rates. Users may see higher CPU temperatures in new AMD Ryzen powered devices than they are used to. ASUS is releasing a BIOS update for its X670 and B650 motherboards with a new PBO Enhancement feature that simplifies thermal and performance management. Users can significantly reduce CPU temperature with a few clicks, possibly improving performance and lowering fan noise. To be clear, AMD assures its customers that its latest chips can run safely at normal temperatures. Modern CPUs have self-imposed restrictions that prevent them from reaching dangerous temperatures. Furthermore, users are unlikely to reach the maximum temperature of 95 C until they perform workloads that use all CPU cores. Users will often see significantly lower CPU temperatures in normal operations, from moderate workloads to most gaming sessions.
Enable PBO Enhancement in BIOS
If users need help with the following process, they can watch the official ASUS support video or follow the step-by-step guide. The basic steps to enable PBO Improvement are as follows:
Download the above BIOS update from the ASUS support site, then extract the contents of the ZIP archive. Double-click on the BIOS renamer tool that was extracted along with the firmware file. This will automatically convert this update to the correct format with the CAP file extension. Then copy or move the renamed file to the root of the USB drive with the CAP extension. To start the update process, turn off the PC but leave it connected to the power supply. Then insert the USB drive into the port labeled “BIOS” on the back panel of the motherboard. Press and hold the nearby BIOS Flashback button for three seconds or until the Flashback LED flashes three times. This indicates that the update has started. The light will then blink slowly for the next few minutes. When this flashing stops, the update process is complete. At this point, remove the flash drive, restart the PC and the update process will automatically take the user to the motherboard’s UEFI BIOS interface where the user will have the option to enable PBO Enhancement. Once the user enters the UEFI BIOS interface, enable Advanced Mode. Then navigate to the Extreme Tweaker tab and select Precision Boost Overdrive.
In the menu that opens, select the Boost option from the Precision Boost Overdrive drop-down menu. Then choose one of three preset thermal limits. Level 1 sets the maximum target temperature to 90°C, a slight decrease from the default 95°C. Levels 2 and 3 drop the maximum CPU temperature more aggressively to 80°C and 70°C, respectively. Once the desired level has been selected, the user can save these settings and exit the BIOS.
Several factors affect how CPU performance changes after enabling PBO Enhancement. CPU and motherboard models have the biggest influence, followed by cooling solutions. The PBO Boost setting also has a significant effect, as do factors such as ambient temperature and the characteristics of other components in the computer. To get an idea of what kind of performance changes to expect, ASUS ran its own tests with four different AMD Ryzen CPUs. Each chip was tested with a 280mm AIO liquid cooler. For comparison, ASUS also tested each chip with default PBO settings. Let’s start at the top with the AMD Ryzen 9 7950X and Ryzen 9 7900X: With default settings, the system achieved a score of 37,811 in the Cinebench R23 multi-core test. Enabling PBO Boost Level 1 lowers the temperature by 5°C while improving performance – because with this setting, the user not only sets the temperature limit, but also enables voltage and PBO optimization. Setting the PBO Boost to Level 3 reduces performance by only 3.5% while the peak temperature drops by 25°C. That’s a compromise many fans will make. The PBO Boost benefits are more noticeable on the AMD Ryzen 5 7600X. Setting PBO Boost to Level 3—the most aggressive option—reduced the observed CPU temperature by 20 C without changing performance by more than 0.003% in this test. Users of this chip can expect Level 3 PBO Enhancement to significantly lower CPU temperatures without significant impact on system performance.
Start with a basic BIOS upgrade.
The first step is to install the latest firmware on the motherboard. ASUS introduces new capabilities through BIOS upgrades to the complete X670 and B650 motherboard families. Products for which ASUS implements this feature are listed below, along with links to the corresponding product support sites and BIOS version numbers.
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