How to Overclock AMD Ryzen CPUs: PBO and Curve Optimizer

Learning how to overclock AMD Ryzen CPUs is easier than it used to be, because AMD does most of the work for you — you just need to switch on Precision Boost Overdrive and tune Curve Optimizer. There is no multiplier to set by hand, and the chip protects itself if you push too far.

Ryzen overclocking is different (and easier)

Ryzen chips already boost themselves based on temperature and power, so the job of overclocking is mostly about giving them more room to boost. That is the opposite of the Intel approach, where you set a fixed speed — see our how to overclock Intel CPUs guide for the contrast. Most Ryzen chips are unlocked too, from the Ryzen 5 5600X all the way to the Ryzen 9 9950X. Our overclocking basics guide covers the general rules, and this guide covers the AMD-specific settings.

Step 1: switch on Precision Boost Overdrive (PBO)

PBO raises the power and current limits that hold your Ryzen chip back, so it can boost higher for longer. You will find it in the BIOS, usually under the overclocking or AMD overclocking menu — switch it from Auto to Enabled, or set the limits to Motherboard, which lets the board decide how far to go. On a chip like the Ryzen 7 9700X, PBO alone often gives a small but free gain in multi-core work, because the chip was being held back by its 65W power limit. Good cooling matters here — the more heat your cooler can remove, the higher the chip will boost, so read our cooling guides first.

Step 2: tune Curve Optimizer

Curve Optimizer is the clever part. It lowers the voltage the chip needs at each speed, which leaves more room for it to boost higher — the same speed at less voltage, or a higher speed at the same voltage. Start with a small negative offset, such as -10 on all cores, then test. If it is stable, try -15, then -20. If it crashes, back off. Our step-by-step overclocking guide explains the same small-steps method, and our best CPU benchmark software guide lists the stress tests to use. A Ryzen 7 9800X3D benefits less than other chips, because of its 3D V-Cache — see our AMD 3D V-Cache guide for why.

Step 3: test, test, test

Curve Optimizer crashes are sneaky — they often show up when the PC is idle, not under full load, because the voltage is lowest then. So test both: a heavy stress test, and then a day of normal use. Run a benchmark before and after, and compare the scores using our how to benchmark your CPU guide — a Ryzen 9 9900X with a good Curve Optimizer tune can gain 5–10% in multi-core scores, which is a real gain for free.

What about a manual all-core overclock?

You can still set a fixed all-core speed on a Ryzen chip, but it is usually a bad idea — you lose the high single-core boost that makes Ryzen fast in games, and you often end up slower overall. PBO and Curve Optimizer keep the boost behaviour and just raise the ceiling, which is why AMD recommends them. A fixed overclock only makes sense if your work uses all the cores all the time, such as rendering — and even then, the gain is small. Our CPU benchmarks explained guide shows how to check whether a manual overclock actually helped.

The bottom line

Overclocking a Ryzen CPU is a two-step job: switch on PBO, then tune Curve Optimizer in small steps, testing as you go. It is free performance, it is hard to get wrong, and it works on almost every Ryzen chip. Read our how long a desktop CPU lasts guide for what heat does over time, and browse our overclocking guides and AMD CPU guides for the next steps.