FPS vs Refresh Rate: What Is the Difference & Why Frame Times Matter

1. The Core Difference: GPU vs. Monitor

The most common misconception in PC gaming is treating FPS and Refresh Rate as the same metric. While they both relate to how smooth a game feels, they are generated by completely different pieces of hardware.

What is FPS (Frames Per Second)?

FPS is a measure of output from your system's rendering engine—specifically your GPU and CPU working together. Every single frame in a video game must be calculated. The CPU calculates physics, AI, and player input, and then sends draw calls to the GPU. The GPU then renders the geometry, textures, lighting, and shadows to produce a final 2D image.

If your system completes this process 120 times in a single second, you are running at 120 FPS. This number is entirely unbounded; if you have a powerful enough system running a lightweight game (like CS2 or Valorant), your system might generate 600 or even 800 FPS.

What is Refresh Rate (Hertz)?

Refresh Rate, measured in Hertz (Hz), is a hardware limitation of your physical monitor. It dictates the maximum number of times the screen can draw a new image per second.

A standard office monitor has a refresh rate of 60Hz, meaning it draws a new image every 16.67 milliseconds. A competitive gaming monitor might be 144Hz, 240Hz, or even 360Hz. Crucially, a 60Hz monitor is physically incapable of showing you more than 60 frames in one second, no matter how fast your GPU is working.

2. What Happens When They Don't Match?

Because your PC and your monitor act independently (unless synced by specific software), their speeds rarely align perfectly. This mismatch results in different visual anomalies.

Scenario A: FPS is Higher than Refresh Rate (Screen Tearing)

If your PC outputs 120 FPS into a 60Hz monitor, the GPU is sending a new frame while the monitor is still in the middle of drawing the previous one. The monitor will simply stitch the two frames together mid-draw. When panning the camera quickly, you will see a horizontal slice through your screen where the top half of the image doesn't align with the bottom half. This is called Screen Tearing.

Scenario B: FPS is Lower than Refresh Rate (Stuttering)

If you have a 144Hz monitor but your GPU is struggling to render a heavy game like Cyberpunk 2077 at 45 FPS, the monitor is forced to display the exact same frame multiple times before the GPU finishes the next one. This uneven delivery of frames creates a jarring, choppy sensation known as micro-stuttering.

3. Understanding Frame Time (The Secret Metric)

Gamers obsess over average FPS, but Frame Time is actually a much better indicator of how smooth a game feels. Frame Time is the exact amount of time (in milliseconds) it takes for your PC to generate one single frame.

If a game runs at exactly 60 FPS perfectly smoothly, every single frame takes exactly 16.67ms to render. But averages lie. If your game renders 59 frames in 0.5 seconds, and then the 60th frame takes 0.5 seconds to render because of a sudden explosion, your software will still report "60 FPS Average". However, you will experience a massive, half-second freeze. This is why reviewers focus on 1% Lows rather than just average FPS.

Standard Refresh Rates and their Ideal Frame Times

Refresh Rate	Ideal Frame Time	Best Use Case
60 Hz	16.67 ms	Casual gaming, office work, console ports
120 Hz	8.33 ms	Modern console gaming (PS5/Xbox Series X)
144 Hz	6.94 ms	The standard for modern PC gaming
240 Hz	4.16 ms	Competitive FPS (Valorant, CS2, Apex Legends)
360 Hz+	2.77 ms	Professional esports tournaments

4. Sync Technologies: Fixing the Disconnect

Because tearing and stuttering ruin the gaming experience, display manufacturers created sync technologies to force the GPU and monitor to communicate.

V-Sync (Vertical Sync)

The oldest solution. V-Sync forces your GPU to hold onto a rendered frame until the monitor is ready for its next refresh cycle. This completely eliminates screen tearing. However, it introduces Input Lag. Because the GPU is waiting for the monitor, your mouse clicks and keyboard presses are slightly delayed before appearing on screen. Competitive gamers almost always turn V-Sync off.

G-Sync and FreeSync (Variable Refresh Rate - VRR)

Nvidia's G-Sync and AMD's FreeSync revolutionized PC gaming. Instead of forcing the GPU to wait for the monitor, VRR technologies force the monitor to wait for the GPU. If your GPU outputs 83 frames in a second, your monitor dynamically changes its refresh rate to 83Hz for that exact second. This eliminates tearing and micro-stuttering without the severe input lag penalty of V-Sync.

5. Diminishing Returns: Do You Need 240Hz or 360Hz?

The jump from a 60Hz office monitor to a 144Hz gaming monitor is monumental. At 60Hz, a new frame is drawn every 16.67ms. At 144Hz, a new frame is drawn every 6.94ms. That is a massive visual reduction of nearly 10 milliseconds, making mouse movements feel incredibly responsive.

However, the law of diminishing returns applies heavily as you climb higher:

• 60Hz to 144Hz: 9.73ms reduction in frame time. (Massive, noticeable by anyone).
• 144Hz to 240Hz: 2.78ms reduction. (Noticeable by competitive players, but subtle).
• 240Hz to 360Hz: 1.39ms reduction. (Almost imperceptible to the human eye, relevant only to top-tier esports professionals aiming for minimal input latency).

For 95% of PC gamers, a high-quality 144Hz or 165Hz 1440p monitor provides the absolute best balance of motion clarity and visual fidelity, provided your graphics card can sustain that framerate.