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How to overclock RAM

When people talk about overclocking, they are usually referring to the CPU and GPU. However, it is also possible to overclock the RAM, and in some cases, it can lead to greater performance enhancements than any other tweaks you make.

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45 minutes

What You Need

  • Benchmarking software

  • Access to the BIOS

If you've never tried your hand at it, overclocking your RAM might feel a little intimidating, but don't worry — it's actually quite easy. You don't need to have one of the best RAM kits, either, even though it certainly helps! If you're wondering whether you should overclock your computer's memory, we're here to tell you the pros and cons of doing so. We'll also walk you through the whole process below.

Corsair DDR5 RAM inside a PC.

What are the benefits of overclocking RAM?

Overclocking RAM improves the data transfer rate, which refers to how quickly the RAM delivers data to the CPU to complete a process. If your RAM is too slow, it can create a bottleneck that doesn’t fully utilize the potential of your CPU. If you're running a budget system, this might not matter much, but if your computer houses a top-notch processor, you don't want to slow it down with a memory kit that's underperforming.

The easiest solution to this is to just buy newer, faster RAM. However, you can actually bump up the speeds on your RAM manually as long as you don’t exceed the recommended voltage, and in some cases, you can only get the most from your faster memory kits by performing some system tweaks of your own.

Overclocking your RAM can net some performance gains in day-to-day uses, but it really shines in gaming. Playing games that rely more on the processor than the graphics card will highlight the importance of RAM. Using faster memory speeds up the data transfer to the CPU and may result in higher frames per second (fps).

Whether you're an enthusiast, a gamer, a person who likes to get the most out of their hardware, or simply a curious user, overclocking your RAM can bring a share of benefits — and it's safe if you do it correctly.

RAM overclocking explained

Before we jump into the ins and outs of overclocking your RAM, we'll give you a quick rundown of what your RAM does and how the whole process works.

RAM, also known as random access memory, lets your computer store data, but only for a while. This means that it only handles the data that's currently in use and then shares it with the CPU. Streamlining this process can have an impact on the performance of your whole system.

Every program that you use loads into the RAM directly from your storage, be it a hard-disk drive (HDD) or a solid-state drive (SSD), which is a persistent type of memory that can store files on a long-term basis. The purpose of overclocking RAM is to boost its speed, which in turn makes it quicker to receive information and then pass it on to your processor.

You'll usually see RAM speed measured in megahertz; for example, your memory kit may be a DDR4 RAM that runs at 3200MHz. This refers to the clock speed. In simple terms, the memory speed shows you how many times per second the RAM stick can access its memory.

Many RAM kits come with a pre-overclocked option referred to as an XMP (Extreme Memory Profile). This can be a little tricky because when you install your new RAM, you'll notice that it will often run at the box speed as opposed to the overclocked speed. Having a saved XMP profile will help you bring that kit up to the factory overclock provided by the company that made it.

In order to overclock RAM, you'll be adjusting its speed and its timings. This will include having to find that sweet spot that works for your machine and then getting your RAM to be stable at that point. Let's take a look at how that can be achieved.

A pair of G.Skill Trident Z5 DDR5 RAM modules.

Prepare to overclock

The most important thing to do when you start overclocking RAM (or any component) is to establish a baseline. Doing this is not all too difficult. Follow the steps to prepare for overclocking.

Step 1: Take note of your memory's default speed and timings with a utility like CPU-Z. Note down the speed and timings because you'll be comparing them to your new standings later.

In addition to CPU-Z, you'll also want to have a tool like HWInfo running in the background to keep an eye on memory temperatures and for finer frequency tracking.

If you're using an AMD Ryzen processor and you plan to overclock manually, you can also download a tool called DRAM Calculator for Ryzen. This will help you choose the right frequency for your particular hardware.

CPU-Z stress and monitoring tool.

Step 2: With both of your tools set up, it's time to put your current RAM settings through a bit of a stress test. This is where benchmarking tools come in.

PassMark and AIDA64 are great synthetic benchmarks that will give you some raw bandwidth numbers to help figure out how much of an effect your overclocking has had. Cinebench is a CPU-intensive application that can show how much your RAM's overclock has improved CPU performance. Lastly, Memtest is great for keeping tabs on your RAM, so use it throughout the process.

You need to run these programs before the overclocking and then again once more when you're done in order to compare the scores.

For more real-world testing, CPU-intensive games like Shadow of the Tomb Raider, Civilization VI and GTA V can give you a good idea of what game performance improvements you have managed to achieve.

Cinebench stress test.

Overclock using XMP memory profiles

Most modern AMD and Intel CPUs support anywhere between 2666MHz and 3600MHz of memory right out of the box, which means your motherboard and processor will default to running memory at those speeds. If you've purchased a kit that's rated to go faster than that, though, it will have shipped with an XMP, or extreme memory profile. These automatically "overclock" the memory by setting it to its rated speed and timings, providing a quick and easy way to boost performance.

We will guide you through the process of XMP overclocking in our steps below.

Step 1: To access XMP, head into your UEFI/BIOS by hitting your motherboard's respective key on startup. It's typically one of the F1 to F10 keys or Delete.

Step 2: With the BIOS open, it's time to look around. Every motherboard is different, but you want to search for overclocking settings. In our ASUS example, it's in the Extreme Tweaker menu. Look in the memory tuning section, and when you find your memory's XMP settings, choose the one that you want to use.

Save the settings and restart, and you should be able to see your new memory settings.

Many of these kits can go further than the XMP profiles allow, however. To do so, you'll need to dive into the more time-consuming and complicated world of manual overclocking.

XMP settings in BIOS.

Manual RAM overclocking

Manual overclocking is the most time-consuming option, but it can also have the biggest payoff if you know what you’re doing. It's also the best way to hit higher RAM speeds than those saved in XMP profiles. While it might seem a bit scary, you can rest assured that overclocking your RAM should be fairly safe as long as you're careful and don't adopt an "all at once" kind of approach.

**Warning: ** Don't raise your DDR4 memory's voltage above 1.5v, as that can damage your RAM over the long term. You also want to keep the temperature of your memory under 122 degrees Fahrenheit (50 degrees Celsius) at all times to help avoid crashes and instability.

If you're running an AMD CPU, it's also important you consider the Infinity Fabric clock and its synchronization with your memory. Read more in the section below.

Step 1: As with the XMP settings, find the memory-tweaking menu in your UEFI/BIOS, only this time use Manual settings as opposed to the pre-determined XMP options.

Begin raising the frequency slowly, a step at a time. The lower the better, typically. You want to take it slow and steady instead of rushing into it.

RAM overclocking in the Asus BIOS.

Step 2: Once you've adjusted your memory frequency, restart your computer and boot Windows. It's now time to run some benchmarks using the programs we mentioned above. Test thoroughly, not just using programs but also using your favorite CPU-intensive games.

Step 3: If you complete all the benchmarks without crashes or errors, raise the frequency again. If you run into crashes, you can scale back your overclock and consider the job complete, or raise the voltage to see if that improves stability.

Remember to take it slow and do your due diligence with testing. If you raise the frequency too high in one go, you won't know what frequency is unstable and what isn't, forcing you to go further back down to find a point of stability.

Keep an eye on the performance numbers in your benchmarking too. Raising the frequency can sometimes cause an automatic loosening of your RAM's timings, which can affect its latency and performance. Sometimes it's better to have a lower frequency with tighter timings.

Step 4: When you find a frequency you're happy with, perform additional, longer-term benchmarking and stability testing to confirm that even under repeated load, your memory won't cause any system crashes. If it does, lower the frequency or raise the voltage as necessary, and perform another round of heavy stability testing.

G.Skill RAM sticks installed in a computer.

How to tighten the timings

If you want to take things a step further, you can always tighten the timings in addition to tweaking your RAM's frequency.

You can typically do so in the UEFI/BIOS in the same section as adjusting the frequency. You'll have to disable XMP profiles and switch to manual overclocking.

Tightening the timings means that you'll be tweaking the various numbers, saving your new settings, and then restarting the computer to see if it runs smoothly. This is a bit of a trial-and-error job and should mostly be reserved for more advanced users who feel confident that they know what to do.

Never change too many things at once, and remember that not all frequency and timing combinations will work well together at all. Play with the settings until the benchmarks return stable results for at least 30 minutes of testing.

Things to remember in regard to AMD and Infinity Fabric

Overclocking RAM with an AMD Ryzen processor is very similar to Intel CPUs, but you also need to consider the Infinity Fabric. It's a proprietary system interconnect architecture within AMD CPUs that has its clock speed synchronized with your memory's. When it goes up, so does the Infinity Fabric's, up to a point. That 1:1 ratio changes after 3,600MHz, and while that can mean greater overall performance, the latency loss isn't always worth it.

Infinity Fabric overclocking is also a possibility for those who want to play with frequencies after de-syncing it from the memory, but that is more advanced overclocking and requires time and energy of its own.

Just know that if you want to raise the memory frequency over 3,600MHz on an AMD Ryzen system, you're going to need to adjust the Infinity Fabric as well to get the best performance.

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