GIGABYTE Ryzen 7 Overclocking Guide

The GIGABYTE OC team prepared a GIGABYTE Ryzen 7 overclocking guide for those who wish to get the most out of their AMD Ryzen 7 and AM4-based processors. The guide was originally published by GIGABYTE and is shared at with explicit permission.


Introduction: Ryzen Marks the Return of AMD

Since the glory days of Athlon AMD CPUs have been mostly used in budget builds. With the release of Ryzen™, AMD processors are now back in the limelight. Ryzen, built on the AM4 socket, brings large IPC improvements, multi-threading and DDR4 support and increased energy efficiency—all at a competitive price. Read on to learn how to get even more value out of your AMD Ryzen processor.


How to Overclock Your AMD Ryzen 1800X CPU

For reference we are using a GIGABYTE AORUS AX370-Gaming K7 motherboard, an 1800X AMD Ryzen 7 processor, 16GB G.Skill DDR4 Trident Z 3600Mhz, an air cooler, the ETS-T50A-BVT, and a liquid cooler, the Lepa AquaChanger 240 All-In-One.

Based on our testing most Ryzen 1800X processors can hit around 4GHz on standard air coolers using a 1.45-1.5 Vcore. In this guide we will be targeting a frequency of 3.9-4.0GHz from a stock frequency of 3.6 GHz.

Disclaimer: Overclocking will technically void your warranty. While it’s usually safe, there is potential to damage the chip if you push voltages too high.


Taking Your CPU to the Next Level – Overclocking

Simply follow the steps below and you’ll be enjoying your overclocked Ryzen powerhouse in no time.

Step 1: Enter the BIOS

Enter the BIOS by restarting your computer and pressing the “delete” button before the OS launches

Gigabyte AM4 M.I.T bios

Step 2: Enter “Advanced Frequency Settings”

Change your “CPU Clock Ratio” to “39.00”. A CPU clock ratio of 39 multiplied by 100 which is our default “Host Clock Value” gives you a frequency of 3900 MHz.

The CPU comes with a default CPU frequency of 3600 MHz, which means that it has a default “CPU Clock Ratio” of “36.00” and a default “Host Clock Value” of “100”.

Interesting fact! We noticed that if you look in CPU-Z while running at default clocks, the frequency jumps up and down. This is the power saving settings at work. Once you overclock and increase your “CPU Clock Ratio” to any value about the default setting of “36.00” the measured frequency stops going up and down.

Different from Intel, “CPU Clock Ratio” can be adjusted in increments of 0.25x instead of 1.0x. For example “CPU Clock Ratios” of 36.25, 36.50, 36.75 etc are possible.

Gigabyte AM4 advanced frequency bios

Step 3: Adjust Your Voltage Settings

Now we have tuned almost all the features and the frequencies of our CPU but in order for the CPU to work at a higher speed it needs to be supplied with higher voltage.

Go to the starting BIOS page (M.I.T.) and select the “Advanced Voltage Settings” option.

Gigabyte AM4 advanced voltage bios

3a. Change CPU Vcore: Raising this helps keeps the system stable at higher CPU frequencies. However, it also increases the amount of heat your CPU produces. We suggest you to keep Vcore from 1.4 to 1.5v when overclocking to around 4 Ghz–however—CPUs differ, some require higher voltages to be stable, some lower. There’s a large component of luck involved.

Gigabyte AM4 advanced voltage bios

3b. Adjust the Three New Voltage Settings: VCORE SOC, CPU VDD18, CPU VDDP

These are new settings that only exist on our X370 Chipset motherboards. For a little extra boost in stability while overclocking we suggest you to change VCORE SOC up to 1.35 volts when using standard air or liquid cooling, for CPU VDD18 you can adjust it up to 2.1 volts and for CPU VDDP up to +0.2 volts.

3c. Adjust CPU Loadline Calibration Setting

If you need some extra stability adjust this setting to either “Turbo” or “Extreme”. You may notice that after this adjustment your CPU Vcore is higher.

Step 4: Optimize Your Memory Settings

There are two different methods of optimizing your memory settings, the easy way through the Extreme Memory Profile (X.M.P.) option, and the more difficult way through manually adjusting your ram settings.

4a. Easy Way

Go back to the “M.I.T.” starting page. Select “Advanced Memory Settings”. Here you see the “Extreme Memory Profile (X.M.P.)” option. Enable it. The system will choose the optimal memory frequency and DRAM timings for you.

Gigabyte AM4 XMP

4b. More Difficult Way

AMD only supports the following system memory multipliers (memory frequencies): 2133, 2666, 2933 and 3200MHz. Select the frequency that your memory sticks run at. Since X.M.P. is not enabled, your memory timings will be automatically set by the CPU. Next, go back to “M.I.T.” and select “Advanced Voltage Settings”. Set your DRAM Voltage to your specific memory modules recommended voltage setting.

Gigabyte AM4 advanced memory bios

Now that you’ve set your overclocks, it’s time to make sure that your system is stable!


Stability Testing & Results

Congratulations! You have obtained a clock rate of around 4 GHz. Now it’s time make sure that it’s stable. We’re going to use the software below to monitor our system, stability test, and adjust our overclocks.

Prime95 – This is used to stress test our CPU in order to ensure that it’s stable in the most taxing of conditions.

CPU-Z – Used to monitor our CPU frequencies. Version 1.78.3 is preferred.

HWiNFO – Used to monitor idle and load temperatures and vcore settings.


How to Stability Test

Step 1: Prepare Stability Testing and Monitoring Applications

Open up CPU-Z, HWiNFO, and Prime95 so you are able to stress test and monitor CPU temperature, frequency, and memory timings all on the same screen.

prime95 configuration

Step 2: Start Prime95

After starting the Prime95 torture test highlight the Prime95 tray icon—all cores should say “self-test”, if it shows “not working” that means that specific core has failed to pass the test. Another form of failing the stability test is that your system may simply just reboot or freeze, which means your settings were too aggressive and your CPU has failed the stability test. We normally test Prime95 for 1 hour. This duration can be increased for more assurance.

Step 3a (Fail): Close Prime95

Close Prime95 by right clicking the Prime95 icon on the tray bar in the lower right side of your screen and selecting “Exit”. This closes Prime95.

Step 3b (Fail):  Adjust Frequency or Voltage

Now it’s time adjust your frequency or voltage settings. You can do this either through the BIOS or using EasyTune which is available through the GIGABYTE App Center. You have two options: Either increase CPU Vcore or decrease “CPU Clock Control”. We recommend you to stay under 95° C on your CPU along with a CPU Vcore below 1.55 volts if possible. After making adjustments go back to Step 1. If it continues to fail dial down your “CPU Clock Control” until you pass stability testing.

gigabyte am4 easy tune


Step 4 (Success): Enjoy Overclock or Increase Frequency

Congratulations, your current overclock is stable. You may want to try for a higher frequency. To do so, experiment with raising your CPU Clock Control and CPU Vcore settings either in BIOS or EasyTune and go back to Step 1 for stability testing to ensure that it’s stable.

The below picture shows a 4.0 GHz OC on liquid cooling passing 1 hour of stability testing:

gigabyte am4 overclocking success



We ran tests using air and liquid cooling setups at different voltages using an AMD Ryzen 1800X to show the difference in thermal performance. As you can see with our liquid cooling setup our average temperatures are 8.5° C lower. However, we did not notice the ability to obtain higher frequencies when going from air cooling to liquid cooling despite the difference in average temperatures.

  • Our Liquid Cooling Setup (83.3 – 84.6°C)

    • Liquid cooler: Lepa AquaChanger 240 All-In-One CPU Liquid Cooler
    • Motherboard: AX370-Gaming K7
  • Our Air Cooling Setup (92.6 – 98.0°C)
    • Air cooler: ETS-T50A-BVT Air Cooler
    • Motherboard: AX370-Gaming K7


At a stock frequency of 3.6GHz we obtained 1612 cb on Cinebench R15.

gigabyte am4 overclocking cinebench r15

At our goal of 4 GHz while using memory XMPs at a frequency of 3200 MHz we obtained a Cinebench R15 score of 1773 cb. That’s a 161 point difference!


GIGABYTE Ryzen 7 Overclocking Advanced Notes

For experienced users, here are some notes that may aid you.

If you try to manually adjust your memory timings you will notice that at above 2666 system memory multiplier your CAS Latency timing when measured in Windows will always go up to the next even number. For example a CAS Latency timing setting of 15 in the BIOS will show a setting of 16 in Windows.

AMD only provides 5 memory timing settings: CAS Latency, tRCDRD, tRCDWR, tRP and tRAS. On Ryzen command rate is always at 1T and it cannot be changed.

If your settings are too aggressive you might see the two following codes on your Diagnostic LED:
F9 followed by shutdown: To resolve this cycle your PSU
F9 followed by 0d: Your OC settings have been reset

On Ryzen the Northbridge frequency is tied to memory frequency. 3200 DDR4 frequency is 1600 DDR frequency which gives us 1600 MHz of Northbridge frequency.

If you want to achieve higher memory frequencies than 3200 MHz then you need to raise “Host Clock Value”. For frequencies above 104 MHz on the “Host Clock Value” you need to change the “PCIe Slot Configuration” setting to “Gen2”, which is under “Miscellaneous Settings” under “M.I.T.”.


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