Refresh Rate Explained: What Hz Means for Your Monitor

What is refresh rate?

Refresh rate is a fundamental specification that describes how many times a monitor redraws the entire image each second. It is measured in hertz (Hz), which stands for cycles per second. The ENERGY STAR program, which certifies energy-efficient monitors, defines refresh rate as a measure of how many times a display can update the picture in a second. Standard monitors refresh at 60Hz, meaning the display updates 60 times per second.

The refresh rate determines the maximum number of distinct frames your monitor can show in one second. If your graphics card produces more frames than the monitor can display, the excess frames are not shown, which can lead to issues like screen tearing. Conversely, if the monitor refreshes faster than the GPU produces frames, the display repeats the same frame until the next one is ready, which can cause judder. A higher refresh rate gives the display more opportunities to show new frames, so motion is generally smoother.

Modern connection standards have been developed to support very high refresh rates. For example, the HDMI 2.2 specification supports 4K resolution at 240Hz, allowing monitors to display fast-moving content without losing fluidity. This is a significant advancement over older interfaces that capped refresh rates at lower values. When selecting a monitor, the refresh rate tells you how capable it is at rendering smooth motion, but it is only one part of the overall display quality.

Refresh rate and panel technology

The refresh rate of a monitor is closely tied to the panel technology used in its construction. Different types of LCD panels, such as IPS, VA, and TN, have historically had different refresh rate capabilities. For example, TN panels were often used for high-refresh-rate gaming monitors because they could achieve faster refresh times, but they have inferior color reproduction and viewing angles. IPS and VA panels have improved significantly over the years and now offer high refresh rates with better image quality.

OLED panels are a newer technology that can achieve extremely fast response times, which complements high refresh rates. Since OLED pixels emit their own light and switch states almost instantly, motion blur is minimized, making high refresh rates even more effective. In contrast, some budget IPS panels may have a 60Hz refresh rate, while premium models can reach 144Hz or higher. Our guide to refresh rate comparison provides a deeper look at how different rates affect motion.

When choosing a monitor, consider the panel type alongside the refresh rate. A high refresh rate on a slow panel can still result in noticeable ghosting. For that reason, our recommendations for gaming monitors weigh both specifications. You can also read more about IPS and OLED to understand their advantages.

How refresh rate affects motion smoothness

The human eye can perceive flicker in displays that update at low frequencies, although the threshold varies. A 60Hz refresh rate is generally considered sufficient for standard use, but moving objects can appear slightly blurred or stuttery, especially when the content scrolls or pans quickly. Higher refresh rates reduce this perceived judder because the display updates more often, providing a smoother transition between frames.

The relationship between the GPU's frame rate and the monitor's refresh rate is critical. When a GPU renders a frame slightly faster or slower than the refresh interval, the image can tear, where two frames are shown at once. The HDMI Variable Refresh Rate spec explains that when the GPU cannot finish rendering the next frame in time, the source must either repeat the current frame or display the partially rendered next frame, causing judder and tearing. Raising the refresh rate narrows the time window in which this mismatch can occur, but it does not completely solve the problem.

For everyday tasks like scrolling through web pages or editing documents, the difference between 60Hz and 120Hz may be subtle, but many users notice a marked improvement in the fluidity of text and cursor movement. For gaming, the benefit is more pronounced. Fast camera pans in first-person shooters or racing games are much clearer at 144Hz or 240Hz. If you are a competitive player, a higher refresh rate can give you a slight edge by allowing you to see the action sooner and with less blur.

Variable refresh rate (VRR)

Variable refresh rate, or VRR, is a technology that allows the monitor to adjust its refresh rate dynamically to match the output frame rate of the graphics card. This is in contrast to a fixed refresh rate monitor, which always updates at the same rate. VRR eliminates screen tearing and reduces stuttering because the display waits for the GPU to deliver a complete frame before refreshing. The HDMI specification includes VRR as a core feature for gaming and media consumption.

NVIDIA's G-SYNC is a proprietary implementation of VRR that is rigorously tested to ensure tear-free, stutter-free gameplay. According to NVIDIA, G-SYNC displays feature a dedicated processor that provides a full variable refresh rate range and variable overdrive for a pristine image. G-SYNC Compatible monitors are validated by NVIDIA to deliver a good basic VRR experience, though they do not use the dedicated processor. AMD's FreeSync is an alternative that uses the DisplayPort adaptive-sync standard.

Modern connections like HDMI 2.2 support VRR in addition to high refresh rates. The HDMI 2.2 spec lists VRR among its enhanced gaming features, noting that it reduces or eliminates lag, judder, and frame tearing for more fluid gameplay. If you are considering a monitor for gaming, look for one that supports VRR, whether through HDMI or DisplayPort. To understand the differences between G-SYNC and FreeSync, read our dedicated guides on NVIDIA G-SYNC and AMD FreeSync. You can also explore our article on adaptive sync to see how VRR works across platforms.

What refresh rate do you need?

The ideal refresh rate depends on how you use your monitor. For general office work, email, and web browsing, a 60Hz monitor is perfectly adequate. Standard monitors refresh at 60Hz, and the vast majority of productivity tasks involve static or slowly moving content. If you spend long hours staring at spreadsheets or reading text, a higher refresh rate can make scrolling feel smoother, but it is not a necessity.

For programming and coding, a 60Hz monitor is sufficient, though some programmers prefer 120Hz or higher because fast cursor movement and smooth scrolling reduce eye strain. A higher refresh rate also helps with reducing perceived flicker, which can be fatiguing for sensitive users. Our guide to programming monitors discusses other features that matter for coders, such as resolution and panel quality.

For gaming, the refresh rate is a key factor. Entry-level gaming monitors often have 120Hz or 144Hz, which is a massive upgrade over 60Hz for fast-paced games. Competitive esports players frequently choose 240Hz or even 360Hz monitors to gain an edge. The HDMI 2.2 specification supports 4K at 240Hz, so the interface itself is not a bottleneck for most gamers. To see available options, browse our guide to 120Hz monitors or 240Hz monitors. If you play varied games and also work, a 120Hz monitor that offers good color accuracy might be the sweet spot.

For video and photo editing, refresh rate is less important than color accuracy, but a 60Hz panel is often enough. However, if you also play games, a 120Hz or 144Hz monitor can serve dual duty. Our recommendations for 4K monitors for work and gaming monitors can help you balance these needs.

What to pick for your use

Questions

Is 60Hz enough for gaming?

60Hz is playable, but a higher refresh rate like 120Hz offers noticeably smoother motion and can reduce input lag. Competitive gamers often prefer 240Hz or higher for the fastest response, but casual gamers will find 60Hz acceptable for many titles.

What is the difference between refresh rate and frame rate?

Refresh rate is the number of times the monitor updates its image per second, measured in hertz. Frame rate is the number of frames the GPU renders per second. For the smoothest experience, the frame rate should match the refresh rate, or you can use VRR to synchronize them.

What is variable refresh rate?

Variable refresh rate (VRR) allows a monitor to change its refresh rate dynamically to match the GPU's output frame rate. This eliminates screen tearing and reduces stutter because the display waits for each complete frame before refreshing. VRR is available through HDMI and DisplayPort and is implemented in technologies like G-SYNC and FreeSync.

Can a monitor support 120Hz over HDMI?

Yes, the HDMI 2.2 specification supports 4K at 120Hz, so many modern monitors and graphics cards can handle it. However, you must use a high-bandwidth HDMI cable and ensure both the monitor and GPU support the required HDMI version.

How do I check my monitor's refresh rate?

You can usually find the refresh rate in your operating system's display settings. In Windows, go to Settings > System > Display > Advanced display settings. The exact steps vary by OS version, but you can typically view or change the refresh rate under display adaptor properties. More detailed instructions are available in the official Microsoft support documentation.