When shopping for a monitor in Singapore, you will see a specification labelled response time, often listed as 1 ms, 4 ms, or 5 ms. Many buyers focus on resolution and refresh rate, but response time plays an equally critical role in how sharp moving images appear. A slow response time creates ghosting, where fast-moving objects leave a faint trail, blurring the image and reducing clarity. This article explains what response time is, how it is measured, the differences between panel technologies, and why it matters for gaming, work, and everyday use in Singapore.
Response time is not the same as input lag, though both affect perceived performance. Input lag is the delay between pressing a key or moving a mouse and seeing the result on screen. Response time is the speed at which a pixel can change from one colour to another. Understanding this distinction helps you choose the right monitor for your needs.
How Response Time Is Measured
Response time is typically measured in milliseconds (ms) and represents the time a pixel takes to transition from one grey level to another and back again. The most common standard is Grey-to-Grey (GtG). Manufacturers also sometimes quote Black-to-White (BtW) or Moving Picture Response Time (MPRT), but GtG is the most widely used metric in marketing materials.
Grey-to-Grey (GtG)
GtG measures the time a pixel takes to change between two shades of grey. Because grey transitions are the most common in real content, GtG is considered a realistic benchmark. A 1 ms GtG response time means the pixel completes the transition in one millisecond. Most modern gaming monitors advertise 1 ms to 4 ms GtG.
Black-to-White (BtW)
BtW measures the time to go from black to white and back. This transition is typically faster than GtG because the voltage change is larger. However, BtW is less representative of actual content, which contains many intermediate shades.
Moving Picture Response Time (MPRT)
MPRT measures how long a pixel remains visible to the human eye, taking into account both the pixel transition and the persistence of the image. MPRT is often lower than GtG because it includes black-frame insertion techniques that reduce perceived blur. Some monitors claim 0.5 ms MPRT, but this is not directly comparable to GtG.
In Singapore, retailers such as Lazada, Shopee, Harvey Norman, and Courts list response time in product specifications. Always check whether the quoted number is GtG or MPRT, as the difference can be significant.
Panel Technology and Response Time
The type of LCD panel used in a monitor strongly influences its response time. The three main technologies are Twisted Nematic (TN), In-Plane Switching (IPS), and Vertical Alignment (VA). A fourth technology, OLED, offers near-instantaneous response times but is more expensive. For a detailed comparison, read our guide on IPS vs VA vs TN vs OLED.
TN Panels
TN panels have the fastest response times, typically 1 ms GtG. They achieve this by using liquid crystals that twist quickly when voltage is applied. The trade-off is narrow viewing angles and poorer colour reproduction. TN monitors are popular among competitive esports players in Singapore who prioritise speed over image quality. Brands such as BenQ and ASUS offer TN gaming monitors with 240 Hz or 360 Hz refresh rates.
IPS Panels
Modern IPS panels have improved significantly and now achieve 1 ms to 4 ms GtG. Older IPS monitors were around 5 ms to 8 ms. IPS offers wide viewing angles (178 degrees) and accurate colours, making them suitable for both gaming and creative work. In Singapore, IPS monitors from Dell, LG, and ASUS are widely available at retailers like Sim Lim Square and online platforms.
VA Panels
VA panels offer the best contrast ratio (3000:1 or higher) and deep blacks, but their response time is slower, typically 4 ms to 8 ms GtG. Dark-to-dark transitions can be especially slow, leading to black smearing. VA monitors from Samsung and MSI are popular for media consumption and single-player games where contrast matters more than raw speed.
OLED
OLED panels have response times below 0.1 ms because each pixel emits its own light and can turn on or off almost instantly. OLED monitors, such as the LG UltraGear 27GR95QE and Dell Alienware AW3423DW, eliminate ghosting entirely. However, they are more expensive, prices in Singapore start around SGD 1,500 for a 27-inch model, and risk burn-in with static elements.
Why Response Time Matters for Gaming
For gamers, response time directly affects motion clarity. When you move the camera in a first-person shooter (FPS) like Valorant or Counter-Strike 2, objects at the edges of the screen should remain sharp. A slow response time causes ghosting, where the previous frame lingers as a faint trail.
Competitive players in Singapore, especially those participating in LAN events at venues like Garena Stadium or local cyber cafes, often choose TN or fast IPS monitors with 1 ms GtG. A 1 ms response time combined with a 240 Hz or 360 Hz refresh rate ensures that each frame is clear, even during fast flicks.
For single-player games with rich visuals, such as Cyberpunk 2077 or Red Dead Redemption 2, a slightly slower response time (4 ms IPS or 5 ms VA) may be acceptable, especially if the monitor offers better colour and contrast. However, VA black smearing can be distracting in dark scenes.
Why Response Time Matters for Work and Productivity
Response time is less critical for office work, but it still affects everyday comfort. Scrolling through a long document or webpage causes text to blur if the response time is too slow. A 5 ms IPS panel is perfectly adequate for spreadsheets, coding, and reading. However, a 8 ms VA panel may show noticeable smearing when scrolling quickly.
For video editing and motion graphics, response time matters more. Editors working with 4K or 60 fps footage need clear motion to judge cuts and transitions accurately. A monitor with 1 ms to 4 ms GtG is recommended. Many Singaporean creative professionals use IPS monitors from Dell UltraSharp or LG UltraFine series, which offer consistent response times and colour accuracy.
Response Time vs Refresh Rate
Response time and refresh rate are related but separate. Refresh rate (measured in Hz) is how many times the monitor updates the image per second. A 144 Hz monitor refreshes 144 times per second. Response time is how fast a pixel can change colour to match the new frame.
For the monitor to display each frame cleanly, the response time must be faster than the time between frames. At 144 Hz, the frame interval is 6.94 ms. A 5 ms response time is fast enough. At 240 Hz, the interval is 4.17 ms. A 1 ms response time ensures the pixel finishes changing before the next frame arrives. If the response time is too slow, the pixel will still be transitioning when the next frame appears, causing ghosting.
This is why high-refresh-rate monitors almost always pair with fast response times. A 360 Hz monitor with a 5 ms response time would not deliver clean motion because the pixel cannot keep up. In Singapore, gaming monitors with 360 Hz and 1 ms GtG are available from brands like ASUS ROG and Acer Predator.
Overdrive and Response Time Overdrive
Most monitors include an overdrive setting that boosts voltage to speed up pixel transitions. Overdrive reduces response time but can introduce overshoot, where the pixel overshoots the target colour and creates a bright inverse ghost. Manufacturers label overdrive levels as Off, Normal, Fast, or Extreme.
For optimal performance, choose the highest overdrive setting that does not cause visible overshoot. In Singapore, many monitors from MSI and ViewSonic include a Response Time menu in the OSD. Testing with a UFO test (available online at Blur Busters) helps you find the best setting.
How to Test Response Time Yourself
You can evaluate response time at home using simple tools. The UFO Test from Blur Busters displays a moving image of a UFO. If the UFO appears sharp with no trailing, the response time is adequate. If you see a faint ghost behind the UFO, the response time is too slow for the current refresh rate.
Another method is to use a high-speed camera to capture the transition. This is not practical for most users, but online reviews from sites like Rtings and TechSpot provide measured response times for hundreds of monitors. When reading reviews, look for measured GtG values rather than manufacturer claims.
Choosing the Right Response Time for Your Needs
Your choice depends on your primary use case. The table below summarises recommendations based on activity:
- Competitive gaming (esports): 1 ms GtG, TN or fast IPS, 240 Hz or higher. Example: ASUS ROG Swift PG259QN (360 Hz, 1 ms).
- Casual gaming + media: 1 ms to 4 ms GtG, IPS or VA, 144 Hz to 165 Hz. Example: LG 27GP850-B (165 Hz, 1 ms).
- Creative work (photo/video): 4 ms GtG or faster, IPS, 60 Hz to 144 Hz. Example: Dell U2723QE (60 Hz, 5 ms).
- Office productivity: 5 ms GtG or faster, IPS or VA, 60 Hz to 75 Hz. Example: Lenovo ThinkVision P27h-20 (60 Hz, 4 ms).
For a comprehensive guide on selecting a monitor, read The Complete Guide to Choosing a Monitor in Singapore.
Common Misconceptions About Response Time
“1 ms is always better than 4 ms”
Not necessarily. A 1 ms TN panel may have worse colours and viewing angles than a 4 ms IPS panel. For many users, the colour and contrast trade-off is not worth the extra speed. Only competitive gamers who play at high levels will notice the difference between 1 ms and 4 ms.
“MPRT is the same as GtG”
No. MPRT includes the persistence of the image, so it is always lower than GtG. A monitor with 0.5 ms MPRT may have 4 ms GtG. Always compare GtG values when evaluating panel speed.
“Response time is the only factor for motion clarity”
Refresh rate, pixel persistence, and the type of content also matter. A 60 Hz monitor with 1 ms response time will still show motion blur because each frame persists for 16.67 ms. Higher refresh rates reduce perceived blur even with the same response time.
Response Time and Local Singapore Buying Considerations
In Singapore, you can find monitors across a wide price range. A 24-inch 144 Hz TN gaming monitor can cost as little as SGD 250 at Lazada or Shopee. A high-end 27-inch 240 Hz IPS monitor from ASUS ROG or LG costs around SGD 600 to SGD 900. OLED monitors start at SGD 1,500 and go up to SGD 2,500.
When shopping in physical stores like Sim Lim Square (specifically #04-00 to #06-00), ask the salesperson for the measured GtG response time, not just the marketing number. Many monitors list “1 ms” on the box but only achieve that in MPRT mode, which may introduce flicker or brightness reduction.
Warranty and return policies in Singapore vary. Retailers like Harvey Norman and Courts offer extended warranties. Online platforms like Amazon.sg have 30-day return policies. If ghosting is noticeable after purchase, you can return the monitor within the window.
Conclusion
Response time is a crucial specification that affects how clear moving images appear on your monitor. For gamers, especially those playing fast-paced titles in Singapore, a 1 ms GtG response time is ideal. For general productivity and creative work, 4 ms to 5 ms is sufficient. Understanding the difference between GtG, MPRT, and BtW helps you make an informed choice.
Always pair response time with an appropriate refresh rate and panel type. A monitor that balances speed, colour, and contrast will serve you well for years. To explore more about monitor specifications, read our related articles below.