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How to Overclock and Undervolt AMD Ryzen CPUs


Overclocking your AMD Ryzen CPU allows you to squeeze the last ounce of performance out of your chip to increase system performance. Undervolting lowers the CPU’s voltage to make it run cooler while not sacrificing a lot on performance. Pushing your CPU to run beyond its stock settings needs some careful tweaking. This tutorial shows you how to overclock and undervolt your AMD Ryzen CPUs.

Tip: are AMD Ryzen CPUs good for gaming? Let’s find out.

Things to Know Before Overclocking AMD CPU

1. Ensure Sufficient Cooling

Overclocking a CPU will increase the power draw and the heat produced by the processor. Hence, it’s best to ensure there is sufficient cooling before you start the overclocking process. You should check out an aftermarket CPU air cooler or AIO cooler. You should also overclock only on a motherboard known for handling overclocking and a power supply with sufficient wattage and build quality.

Good to know: if you are looking to buy a new CPU, you should learn about the importance of its core count and clock speed.

Be Careful Not to Overdo It

Any operation of the CPU beyond its specifications will also void its warranty, so you won’t want to overdo it. If you are careful to not push the chip beyond the specified operating threshold, you needn’t worry.

Benchmark Your System

It’s best to run a benchmark of your current stock performance so that you have something to compare to later. You can use Cinebench to get single-core and multi-core scores of your CPU’s default performance.

Also, we recommended using HWiNFO to monitor the CPU temperature, voltage, and power readings during the benchmark. You can repeat the Cinebench tests after overclocking your processor and compare those scores with the stock scores to see how effective your overclock was. Successful Cinebench runs also help determine whether your overclock is stable.

Don’t Take Shortcuts

Lastly, you should never try to use overclock settings found on the Internet on your own chip – even if it’s the same model. Due to the so-called Silicon lottery, no two units will have the same overclocking headroom. Make sure to test your own settings on your CPU before running a sustained overclock.

Overclocking Ryzen CPU Using Ryzen Master

Ryzen Master is AMD’s overclocking and system monitoring software that provides overclocking features in a Windows environment. Before you start fiddling with its knobs and dials, there are a few things you should know:

  • Your overclock settings will be reverted to default with every system reboot. Ryzen Master doesn’t support auto-start on boot yet.
  • The list of supported processors is limited to Ryzen 2000 CPUs and newer, with feature support differing between CPU generations.
  • Ryzen Master is useful for users who don’t want to run a 24/7 overclock. You can simply turn overclocking on or off with a click, depending on the workload you’re running – no BIOS tweaking is needed.

You can download Ryzen Master from AMD’s website and install it using the instructions of the setup wizard. There are three overclocking modes you can use in Ryzen Master to boost your CPU’s performance:

  • Precision Boost Overdrive (PBO)
  • Auto Overclocking
  • Manual
Ryzen Oc Ryzen Master Modes

While PBO and Auto OC are mostly one-click modes that utilize automated boost mechanisms set by your CPU and motherboard design, the manual mode gives you the most flexibility for overclocking. Users looking for higher gaming performance can choose Auto OC, while those wanting a boost to multi-threaded workloads can opt for PBO.

Overclocking With PBO for a No-Nonsense Boost

PBO is not meant to push your CPU’s frequency beyond the advertised base or boost clocks. It manipulates three separate power limits – PPT, TDC, and EDC – to allow the CPU to reach those advertised boost clocks more often and for sustained intervals, hence improving performance.

You’ll notice a few profiles on the left side of the window. The “Creator Mode” and “Game Mode” are preconfigured profiles. While the former can help with multi-threaded scenarios, the latter should only be used for legacy game support on CPUs with more than eight cores, per AMD’s documentation. For our purposes, we are using “Profile 1” and “Profile 2.”

  1. To enable PBO in Ryzen Master, simply head to Profile 1 and click “Precision Boost Overdrive” in the “Control Mode” options on the right pane.
Ryzen Oc Ryzen Master Pbo
  1. We are leaving the “Additional Control” and “Memory Control” settings as is for this mode. Click “Apply” at the bottom of the window. No system restart is required.
Ryzen Oc Ryzen Master Pbo 2
  1. Save the settings by clicking “Save Profile” at the bottom of the screen.

You can run Cinebench to get a new score for the multi-core test and check what effect PBO had on the performance. You an also choose to run a single-core test again, but PBO hardly affects single-core performance.

Overclocking With Auto Overclocking for an Aggressive Boost

The Auto Overclocking mode is used to set a boost frequency higher than the advertised boost clock. While Auto OC keeps Voltage Control locked just like PBO does, it allows the CPU to boost to higher frequencies while staying under automatic control.

This mode is recommended for users who want to explore a boost in single-threaded workloads like gaming and encoding but don’t want the hassle of manipulating voltage as well.

  1. To set an automatic overclock, click on Profile 1 or Profile 2 and set ”Control Mode” to ”Auto Overclocking” on the right pane.
Ryzen Oc Ryzen Master Auto Oc 3
  1. Just below that, you’ll find the ”Boost Override CPU” setting. Use this to increase the clock speed and let Ryzen Master manage the voltage accordingly. The recommended method is to increase the clock speed by only 25 or 50, then test the stability of the benchmark. Do this with the ”Apply & Test” button at the bottom of the window or with Cinebench.
  2. You also have control over the PPT, TDC, and EDC limits but can leave them on the default settings for now.
  3. If the stress test hangs or crashes the system, relaunch Ryzen Master and test a lower frequency in the next run.

Note that Ryzen Master will require a system restart on engaging Auto Overclocking mode. We’ll leave the other settings like ”Memory Control” untouched.

Overclocking With Manual Mode for Maximum Control

Finally, the Manual mode unlocks all the settings in Ryzen Master, allowing you to not only set the per-core frequency but also tweak the voltage supplied to the CPU. The principle here is to increase the voltage by as little as possible so as to keep the higher CPU clock stable.

If your Cinebench test is crashing the system after increasing the clock speed, increasing the voltage in small increments can increase system stability. If you notice, however, that the CPU temperature in HWiNFO was too high (close to 90 degrees) just before the crash, voltage might not be the issue. Instead, you may need to decrease the frequency a bit.

The Manual mode can potentially unlock higher clock speeds than the Auto Overclocking mode, as you’re no longer limited to the conservative power and temperature curves of the automatic modes.

  1. To start applying your desired changes, click on Profile 1 or Profile 2 and select ”Manual” under ”Control Mode.”
Ryzen Oc Ryzen Master Manual 1
  1. Expand the ”CCD 0” and the ”CCX 0” rows under ”Cores Section.” You’ll see the fastest and second fastest cores on your CPU denoted with a yellow star and a grey circle respectively. (We’re using the Ryzen 7 5700x for illustration. Your core layout could differ depending on your CPU.)
  2. If you want to focus only on these fastest cores, increase the frequency by dragging the respective sliders or typing in the desired frequency (again, in small increments).
  3. You can also set an all-core overclock by clicking the red symbol in the ”CCX 0” row. It will turn green, and you can drag any of the individual sliders to automatically apply the increased frequency to each of the cores. Click ”Apply” and test each of the above scenarios later with a Cinbench score to see which one scores higher.
Ryzen Oc Ryzen Master Manual 1
  1. The next section to tweak is ”Voltage Control.” Increase voltage only by one or two increments, click “Apply,” then test the existing frequency overclock with Cinebench. If you’re unable to achieve stability even with multiple voltage increases, you can try reducing the CPU frequency instead.
  2. Ryzen Master will not restart the system on engaging Manual mode. It might, however, do so when switching from Manual to another mode. If the stress test is successful, you can increase the frequency again, repeat the test, increase the voltage if the test fails, and come back to the frequency setting if it succeeds. We’ll leave the additional settings untouched for the Manual mode.

Undervolting and Eco-Mode With Ryzen Master

Undervolting is a handy technique to make your CPU cooler and more silent than in its stock configuration. The idea is to intelligently adjust the voltage-frequency curve of the processor to achieve the same performance at a lower voltage and temperature.

  1. In Ryzen Master, you can do this by selecting ”Curve Optimizer” in the profiles section on the left, then setting ”Control Mode” to ”Default.” Below that, ”Curve Optimizer Control” will already be ”Included” with ”Auto Offset” turned on. You can leave the settings as is. Note that Curve Optimizer is available only for Ryzen 5000 series processors or newer.
Ryzen Oc Ryzen Master Curve Optimizer
  1. Select either ”All Cores” or ”Per Core” next to ”Curve Optimizer Mode.” We are proceeding with ”All Cores” for an automatic curve optimization. Click on ”Start Optimizing” on the right of the row and click ”OK” to confirm the prompt.
Ryzen Oc Ryzen Master Curve Optimizer Optimizing
  1. Depending on your CPU’s cores and your system configuration, the automatic optimization process will take around 30 to 60 minutes and may restart your system a few times, then display the all-core offset under the ”CO All Core Value” section.
Ryzen Oc Ryzen Master Curve Optimizer 2
  1. Leave the ”Difference Offset Value” section for now and click ”Apply” to engage the Curve Optimizer. Run a Cinebench test to compare your score and max temperatures to the default settings.

Eco-Mode With Ryzen Master

The “Eco-Mode” runs your CPU in a lower power condition to lower the temperature for scenarios where you don’t even need stock performance.

Open any profile on the left, enable “Eco-Mode” under ”Control Mode” and click ”Apply.” Ryzen Master will restart the system for the changes to take effect.

Ryzen Oc Ryzen Master Eco Mode

You’ll find a “Reset” option on the bottom left of the Ryzen Master window to revert your CPU to factory settings. Also, “Basic View” shows you some basic CPU monitoring values, and you can do some quick overclocks with the options on the right.

Ryzen Oc Ryzen Master Basic View

Alternatively, you can also undervolt your CPU with Throttlestop.

Overclocking Using the BIOS

If you want to save your overclock settings so that it persists after a reboot, you can consider using the BIOS for overclocking. Some users even combine the two approaches: using Ryzen Master to test and validate settings within the tool, then applying the settings in the BIOS. Note that you’ll still need to stress test your system with Cinebench after tweaking settings in the BIOS.

  1. Reboot your system and boot into the BIOS by pressing Delete, F12, or any other key displayed on the first screen after restarting. We’re using a Gigabyte motherboard for illustration, so further instructions may differ a bit depending on your specific motherboard manufacturer.
  1. Once you enter the BIOS, click ”Advanced Mode” if it isn’t already enabled. Under the ”Tweaker” tab, start by turning ”Precision Boost Overdrive” to ”Disable” so that it doesn’t interfere with your manual overclock.
Ryzen Oc Bios Oc Pbo Disable
  1. Set the frequency in ”CPU Clock Ratio” to around 200MHz higher than your CPU’s advertised boost clock. This setting is multiplied by 100 to denote the final CPU clock. For instance, ”48” would denote 4800Mhz or 4.8GHz.
Ryzen Oc Bios Oc Cpu Core
  1. Change the voltage in ”CPU Vcore” to maintain the higher frequency. Start with ”1.30” for the first test run.
Ryzen Oc Bios Oc Voltage
  1. Press F10 to save all of your settings and boot into Windows. Start stress testing with a Cinebench multi-core test and keep an eye on your temperature in HWiNFO. If the test succeeds at least three times, you have a fairly stable overclock.
  2. If it fails, try to spot the maximum temperature before the crash. If it was close to 90 degrees, you may be thermally limited and will need to bring the frequency down by 50 to 75MHz in the BIOS before testing again.
  3. On the other hand, if your system crashes, but the temperature was nowhere near 90 degrees, try upping the voltage by one step (0.00625V or 0.0135V) and stress test again. You’ll need a fair number of tests to arrive at a stable overclock for your specific CPU chip. Also, try testing a few games for two to three hours to further test the overclock.

Tip: if you get lost in the BIOS interface, find out what each setting means in the BIOS.

Undervolting Using the BIOS

You can also undervolt your CPU in the BIOS.

  1. Revert all the settings to default from your previous overclock, set ”Precision Boost Overdrive” to ‘”Advanced’” and ”PBO Limits” to ”Disable.”
Ryzen Oc Bios Pbo
  1. Open ”Curve Optimizer.” Set it to ”All Cores” and ”All Core Curve Optimizer Sign” to ”Negative.” In ”All Core Curve Optimizer Magnitude,” you can set a negative offset of “10” to start and increase it to a maximum of “30.”
Ryzen Oc Bios Curve Optimizer
  1. Try testing the undervolt in Windows with stress tests or simply monitoring idle temperature using HWiNFO to see if the results are worthwhile.

Frequently Asked Questions

Is it okay to run an overclock all the time?

Running an extreme overclock on your CPU all the time may lower the lifespan of your chip due to the excessive and constant heat. This could also damage your CPU if you aren’t keeping your CPU temperature in check. But if you’re gaining extra performance in your workloads without breaching 85 to 90 degrees continuously, you can run your overclock constantly without any issues. With Ryzen Master, you can always switch to default settings at any time (requiring a system restart in some cases).

Do I need to leave Ryzen Master open?

No. However, a system shutdown or restart will wipe all the changes you made in Ryzen Master, and you’ll need to apply them again or load a saved profile.

Does Ryzen Master change BIOS?

Ryzen Master doesn’t change BIOS settings. It simply displays the CPU control options you already have in the BIOS in the Windows environment. A system restart removes any changes you made with Ryzen Master. However, it is still recommended to keep your BIOS settings in the default state so as not to interfere with any settings you tweak in Ryzen Master.

Image credit: Unsplash. All screenshots by Tanveer Singh.

Tanveer Singh
Tanveer Singh

Tanveer hunts far and wide for PC Hardware and Gaming ideas to write about. An MBA in Marketing, he has been writing on Technology, Gaming, and Marketing for over 5 years now. When not scouring the web, he can be found trying to identify the next big Altcoin, running for his life in GTFO, or wrecking karts in Smash Karts.

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