Monitor Refresh Rate and Reaction Time
The single biggest piece of hardware in the reaction pipeline.
TL;DR — A 60 Hz monitor adds up to 16 ms of stimulus delay; 144 Hz reduces it to 7 ms; 240 Hz to 4 ms; 360 Hz to under 3 ms. Across a session of 50 reactions, the cumulative difference is large.
The refresh-rate gap between a 60 Hz laptop and a 240 Hz esports monitor is bigger than the gap between an average player and a pro player on the same screen.
Why refresh rate matters for reaction
A monitor only shows new content when it refreshes. If the cue is generated 5 ms after the last refresh on a 60 Hz panel, it waits another 11 ms before being visible — 11 ms added to your reaction. Averaged over many cues with uniform timing, the cost is half a refresh cycle.
Cost by refresh rate
| Refresh rate | Average added delay | Max added delay |
|---|---|---|
| 60 Hz | 8 ms | 16.7 ms |
| 120 Hz | 4 ms | 8.3 ms |
| 144 Hz | 3.5 ms | 6.9 ms |
| 240 Hz | 2 ms | 4.2 ms |
| 360 Hz | 1.4 ms | 2.8 ms |
| 540 Hz | 0.9 ms | 1.9 ms |
When refresh rate matters most
- Reaction tests — every cue carries the full refresh penalty.
- Tactical FPS — duel windows can be a single refresh cycle long.
- Fighting games — reactable startup is measured in 16.7 ms ticks.
When it does not matter
- MOBA macro decisions — operating on 200+ ms windows.
- Strategy games — turns are measured in seconds or longer.
- Single-player story games — no time pressure to optimise.
The diminishing-returns curve
Going from 60 Hz to 144 Hz is a real upgrade for most players — 4–5 ms average improvement, visible in feel and measurements. Going from 240 Hz to 360 Hz saves under 1 ms. The marginal value drops fast above 240 Hz.
Frequently Asked Questions
Will a high-refresh monitor improve my web reaction test?
Yes, by roughly 4–12 ms going from 60 Hz to 144 Hz.
Does the GPU need to push the full refresh rate?
Yes. A 144 Hz monitor running 60 fps performs like 60 Hz for reaction purposes.
Is OLED faster than LCD?
OLED pixel response is near-instant; LCD adds 4–8 ms of grey-to-grey transition. OLED wins by a small margin at the same refresh rate.
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