Monitor Refresh Rate Explained: Hz and Smoothness

Monitor refresh rate is the number of times per second a display redraws the image on screen, measured in hertz. A refresh rate of 60 Hz redraws the screen 60 times each second, 144 Hz redraws it 144 times, and 240 Hz redraws it 240 times, so a higher refresh rate shows more frames per second and produces smoother motion. Refresh rate works with the frame rate the graphics card produces, and the two must align through variable refresh rate technologies such as G-Sync and FreeSync to avoid screen tearing.

This article defines refresh rate, explains the relationship between refresh rate and frame rate, compares the 60 Hz to 500 Hz tiers and their perceived smoothness, covers diminishing returns, variable refresh rate, the distinction from response time, the GPU needed to drive high refresh rates, and motion blur reduction. A tier table maps each refresh rate to its frame time and best use.

What Is Monitor Refresh Rate?

Monitor refresh rate is the number of times per second a display redraws the entire image, measured in hertz. A refresh rate of 144 Hz means the monitor redraws the screen 144 times every second, updating the image every 6.94 milliseconds. The refresh rate sets the ceiling on how many distinct frames the display can show per second, so a 60 Hz monitor cannot display more than 60 frames per second regardless of how many the graphics card renders.

A monitor is an output device, and refresh rate is the specification that governs motion smoothness, distinct from the monitor panel type that governs color and contrast. Refresh rate differs from frame rate: refresh rate is a fixed hardware property of the display measured in hertz, while frame rate is how many frames the graphics card produces, measured in frames per second. A higher refresh rate lowers the time each frame stays on screen, which reduces perceived motion blur and input lag when the graphics card supplies enough frames to match.

How Do Refresh Rate and Frame Rate Relate?

Refresh rate and frame rate relate in that the display shows new frames only as fast as the lower of the two allows. Refresh rate, in hertz, is how often the monitor redraws, while frame rate, in frames per second, is how many frames the graphics card renders. Smooth motion requires both to be high and aligned: a 144 Hz monitor displays its full smoothness only when the graphics card supplies around 144 frames per second, and a powerful card supplying 200 frames per second on a 60 Hz monitor still shows only 60 distinct frames.

When the frame rate exceeds the refresh rate without synchronization, the display shows parts of two frames in one redraw, causing screen tearing. When the frame rate falls below the refresh rate, the display repeats frames, causing stutter.

The panel type does not change this relationship, because refresh rate and frame rate govern motion timing while the panel governs image character. Aligning the two through variable refresh rate, which a later section covers, removes tearing and stutter across the frame-rate range.

What Are the 60Hz, 144Hz, and 240Hz Tiers?

The refresh-rate tiers are 60 Hz, 120 Hz, 144 Hz, 240 Hz, 360 Hz, and 500 Hz, each raising the frames per second the display can show and lowering the frame time. Each tier shortens the interval between redraws, so 60 Hz redraws every 16.67 milliseconds while 240 Hz redraws every 4.17 milliseconds, reducing motion blur and input lag at the higher tiers.

The perceived smoothness rises with the tier, and testing organizations such as Blur Busters have measured the motion-clarity gains between tiers. The common tiers and their character are listed below:

• 60 Hz redraws every 16.67 ms and suits office work, web browsing, and general use where high motion clarity is not required.
• 120 Hz and 144 Hz redraw every 8.33 to 6.94 ms and deliver the largest perceived smoothness jump from 60 Hz, suiting most gaming.
• 240 Hz redraws every 4.17 ms and benefits fast competitive games where reduced motion blur and input lag help aim and tracking.
• 360 Hz and 500 Hz redraw every 2.78 to 2.0 ms and serve professional esports players who pursue the smallest motion and latency gains.

The step from 60 Hz to 144 Hz produces the most noticeable improvement in motion clarity, while each higher tier adds a smaller perceived gain. Reaching the full benefit of a high tier requires both a graphics card that renders enough frames and a panel with a fast enough response time to keep up with the redraw rate.

Why Do Refresh Rate Gains Diminish?

Refresh rate gains diminish because each tier shortens the frame time by a smaller absolute amount as the refresh rate rises. Moving from 60 Hz to 120 Hz halves the frame time from 16.67 to 8.33 milliseconds, an 8.34-millisecond reduction, while moving from 240 Hz to 480 Hz halves the frame time from 4.17 to 2.08 milliseconds, only a 2.09-millisecond reduction. The shrinking absolute change means the human eye perceives a large improvement from 60 Hz to 144 Hz and progressively smaller improvements above 240 Hz.

Blur Busters research shows that motion clarity continues to improve past 240 Hz, but the gains require very high frame rates and become harder to perceive in normal use. The diminishing returns mean a 144 Hz or 240 Hz monitor delivers most of the practical benefit for the majority of users, while 360 Hz and 500 Hz target competitive players chasing the last measure of latency. The panel type and response time can limit the benefit too, because a slow panel blurs motion regardless of a high refresh rate.

What Is Variable Refresh Rate?

Variable refresh rate is a technology that synchronizes the monitor’s refresh rate to the graphics card’s frame rate to eliminate screen tearing and stutter. Without synchronization, a mismatch between frame rate and refresh rate causes tearing when the frame rate is higher and stutter when it is lower.

Variable refresh rate, abbreviated VRR, makes the display redraw the moment a new frame is ready rather than on a fixed schedule, so the refresh rate follows the frame rate within a supported range. The three main implementations are described below:

• Nvidia G-Sync uses a hardware module in the monitor to match refresh to frame rate, validated by Nvidia for tested displays.
• AMD FreeSync uses the open Adaptive-Sync standard over DisplayPort or HDMI, requiring no proprietary module and appearing on many monitors.
• VESA Adaptive-Sync is the industry standard the VESA group defines, on which FreeSync and G-Sync Compatible modes are based.

Variable refresh rate matters most when the frame rate fluctuates below the maximum refresh rate, where it removes tearing and stutter that a fixed refresh rate would show. The technology travels over the DisplayPort or HDMI connection, and most modern monitors and graphics cards support at least one VRR standard, making it a baseline feature for gaming displays at any panel type.

How Does Refresh Rate Differ From Response Time?

Refresh rate differs from response time in that refresh rate is how often the display redraws while response time is how fast a pixel changes color. Refresh rate, measured in hertz, sets how many times per second the monitor updates the whole image, while response time, measured in milliseconds gray-to-gray, sets how quickly an individual pixel transitions from one shade to another. A high refresh rate without a fast response time produces motion blur, because the pixels cannot finish changing before the next redraw, smearing the image.

A 240 Hz monitor redraws every 4.17 milliseconds, so a pixel response slower than that interval blurs the transition between frames. The two specifications must match for clear motion: a fast panel type such as a fast IPS or OLED pairs its low response time with a high refresh rate to deliver crisp motion. A buyer reads both the hertz refresh rate and the gray-to-gray response time, because a high refresh rate alone does not guarantee clear motion if the panel responds slowly.

What GPU Is Needed to Drive a High Refresh Rate?

Driving a high refresh rate needs a graphics card powerful enough to render frames at or near the monitor’s refresh rate at the chosen resolution. A 144 Hz monitor reaches its full smoothness only when the graphics card sustains around 144 frames per second, and the demand rises with both the refresh rate and the resolution. Reaching 240 frames per second at 1080p is achievable for many mid-range cards in lighter games, while sustaining 144 frames per second at 4K demands a high-end graphics card.

The required GPU power depends on the game, the settings, and the resolution, so a competitive player often lowers graphics settings to keep the frame rate near the high refresh rate. A buyer balances the monitor refresh rate against the computer hardware budget, because a high-refresh monitor delivers its benefit only when the graphics card supplies matching frames. Pairing a 360 Hz monitor with an underpowered card wastes the refresh rate, so the GPU and the monitor must be matched, and variable refresh rate smooths the gaps when the frame rate falls short.

How Is Motion Blur Reduced on High-Refresh Monitors?

Motion blur is reduced on high-refresh monitors through shorter frame persistence, faster pixel response, and backlight strobing that inserts black frames. Motion blur on a sample-and-hold display comes from each frame remaining lit until the next redraw, so the eye tracks a static image across the persistence period, blurring motion. Persistence blur is measured as MPRT, the moving picture response time, which falls as the refresh rate rises and the frame stays on screen for less time.

Backlight strobing, marketed as ULMB on Nvidia displays and tested by Blur Busters, inserts black frames between images to shorten persistence and sharpen motion, a technique called black frame insertion. Strobing reduces blur but lowers brightness and usually cannot run at the same time as variable refresh rate.

A fast panel response time also reduces blur by finishing each pixel transition before the next frame. Combining a high refresh rate, a fast panel, and optional strobing produces the clearest motion the display can show.

Refresh Rate Tier Comparison Table

The table below maps each refresh-rate tier to its frame time and best use, summarizing the smoothness and use-case differences the sections above explain.

Key Takeaways

• Refresh rate is how many times per second a display redraws, measured in hertz, with 144 Hz redrawing the screen every 6.94 milliseconds.
• Refresh rate and frame rate must align, because the display shows new frames only as fast as the lower of the hertz refresh rate and the frames-per-second frame rate.
• The jump from 60 Hz to 144 Hz is the most noticeable, while gains diminish above 240 Hz as each tier shortens the frame time by a smaller amount.
• Variable refresh rate removes tearing and stutter through G-Sync, FreeSync, and VESA Adaptive-Sync by syncing refresh to the frame rate.
• Refresh rate differs from response time, and a fast panel response is needed so pixels finish changing before the next redraw, avoiding motion blur.
• A high refresh rate needs a matching GPU that renders enough frames at the chosen resolution, or the refresh rate goes unused.

Last Thoughts on Monitor Refresh Rate

Monitor refresh rate measures how many times per second a display redraws, and it works with the graphics card’s frame rate to determine motion smoothness. The jump from 60 Hz to 144 Hz delivers the most noticeable improvement, gains diminish above 240 Hz, variable refresh rate removes tearing and stutter, and a fast panel response prevents motion blur.

A high refresh rate needs a matching graphics card to supply enough frames. Readers can continue with the explanation of monitor panel types, the overview of output devices, or the guide to display ports that carry the video signal, and the computer hardware guide shows how a monitor fits the full system.