PBO2 for AMD Ryzen - Free Performance!
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Try FreshBooks free, for 30 days, no credit card required at freshbooks.com How does Precision Boost Overdrive 2 ("PBO") work on recent AMD Ryzen CPUs, and how is it different from normal overclocking? Leave a reply with your requests for future episodes. ► GET MERCH: lttstore.com ► AFFILIATES, SPONSORS & REFERRALS: lmg.gg ► PODCAST GEAR: lmg.gg ► SUPPORT US ON FLOATPLANE: floatplane.com FOLLOW US ELSEWHERE --------------------------------------------------- Twitter: twitter.com Facebook: @LinusTech Instagram: @linustech TikTok: @linustech Twitch: twitch.tv
This video explains Precision Boost Overdrive 2 (PBO2) on modern AMD Ryzen CPUs and clarifies how it differs from traditional overclocking. The host emphasizes that PBO2 does not directly overclock the processor; instead it increases the power headroom available to the CPU, allowing it to sustain higher clock speeds for longer periods. The practical takeaway is that enabling PBO2 can yield higher performance by enabling longer boosts, while leaving most settings at their defaults. A recommended method to ensure PBO2 is active is to enable it in the BIOS under the AMD overclocking section, with Ryzen Master able to toggle it in Windows but potentially reverting on reboot depending on configuration. The video also covers optional undervolting via the Curve Optimizer, explaining that undervolting can reduce heat and power consumption while still achieving performance gains, especially on hotter 7000-series CPUs. Viewers are advised to experiment with negative undervolt values (1 to 30 in magnitude) and to proceed cautiously to avoid instability. The host then touches on how to pair PBO2 with a controlled overclock by using the BIOS boost clock override, suggesting small increments (around 25 MHz) to find a stable, higher-than-boost clock. The discussion notes that this approach with PBO2 is comparatively safer than traditional manual overclocking because it raises power limits rather than forcing voltage increases. The segment concludes with a reminder to stress test for stability and a light plug for related content and sponsorship, reinforcing best practices for safe experimentation and optimization.
Topics · computing hardware · hardware optimization · overclocking · processor tuning
Questions answered
- What exactly does PBO2 do for Ryzen CPUs, and how is that different from a traditional overclock?
- PBO2 does not directly overclock the CPU. It increases the processor's power headroom, allowing it to sustain higher clock speeds for longer periods, which can improve performance without forcing higher voltages.
- How do you enable PBO2 on a Ryzen system?
- Enable it in the BIOS under the AMD overclocking section. Ryzen Master in Windows can toggle it, but it may revert on reboot depending on configuration, so enabling it in the BIOS is recommended.
- Can PBO2 be undervolted, and how would you do that?
- Yes, undervolting is possible using the Curve Optimizer. Set a negative value in the magnitude field, typically between 1 and 30, and adjust to balance stability and performance.
- Is it safe to use PBO2 and undervolting together, and what should I watch for?
- Using PBO2 with undervolting is generally safer than traditional overclocking because it avoids manual voltage increases. However, you should stress test to ensure stability and monitor temperatures and power to avoid instability.