The KOORUI S2741LM is a mid-range 4k, 27-inch gaming monitor. It sits above the KOORUI S2721PM, which has a lower resolution. With Mini LED backlighting and 1,152 dimming zones, it competes against monitors with similar specs, like the Acer Nitro XV275K P5biipruzx and the MSI MPG 274URDFW E16M. Like those monitors, it has a native 160Hz refresh rate that you can boost to 320Hz in its dual mode with a lower 1080p resolution. It has typical gaming features, like VRR support, virtual crosshairs, and HDMI 2.1 bandwidth. It also includes a small USB hub with a USB-C port that supports DisplayPort Alt Mode and 90W of power delivery, making it easy to quickly connect a laptop.
Our Verdict
The KOORUI S2741LM is great for PC gaming. Its 4k, 160Hz and 1080p, 320Hz dual modes give you the versatility for playing different types of games. Motion also looks sharp at any refresh rate thanks to its fast response time, although there's more inverse ghosting as the refresh rate drops. Gaming feels responsive due to its low input lag, and it supports all common VRR formats. It also delivers good picture quality while gaming, as it has wide gamut coverage, and its local dimming feature helps it display deep blacks, but small highlights are dimmer due to black crush.
4k, 160Hz and 1080p, 320Hz dual mode.
Low input lag at any refresh rate.
Consistently fast response time.
Deep blacks with local dimming.
Supports all common VRR formats.
Inverse ghosting at low refresh rates.
Small highlights are muted in HDR.
The KOORUI S2741LM is excellent for console gaming. With a 4k resolution and HDMI 2.1 bandwidth, it supports all signals from a PS5 or Xbox Series X|S, except for Dolby Vision. It has great motion handling with minimal blur, and it has low input lag for a responsive feel. It also makes your favorite games look great thanks to its deep blacks with local dimming enabled and a wide range of colors. However, small highlights are muted in HDR.
Low input lag at any refresh rate.
Consistently fast response time.
Deep blacks with local dimming.
Supports HDMI 2.1 bandwidth.
4k resolution for detailed images and sharp text.
Inverse ghosting at low refresh rates.
Small highlights are muted in HDR.
The KOORUI S2741LM is excellent for productivity. It fights glare well in most bright spaces, but reflections are distracting if you have it in front of a sunny window. Text looks sharp thanks to its 4k resolution and high pixel density, and it has a few work-focused features. This includes a USB-C port with 90W of power to charge a laptop and a KVM switch. It also comes with an ergonomic stand and a fairly wide viewing angle that helps if you need to share your screen with someone next to you.
4k resolution for detailed images and sharp text.
USB-C port with 90W of power and DisplayPort Alt Mode.
Includes KVM switch.
Bright enough to fight most glare.
Reflections are distracting in sunny rooms.
The KOORUI S2741LM is good for editing. It displays a wide range of colors, and it has great picture quality if you use its local dimming feature. Blacks are deep, and there's no haloing around bright objects, but it dims small highlights, which is a concern if you're a video editor. Although it has a dedicated sRGB mode, it's inaccurate out of the box, so you need to calibrate it for accurate images. Besides that, its 4k resolution results in detailed images, and it has a USB hub with DisplayPort Alt Mode alongside a KVM switch.
Deep blacks with local dimming.
Displays wide range of colors.
4k resolution for detailed images and sharp text.
Colors are accurate after a full calibration.
Small highlights are muted in HDR.
sRGB mode is inaccurate out of the box.
Reflections are distracting in sunny rooms.
The KOORUI S2741LM has incredible brightness. It fights glare well in most bright spaces. However, small highlights are muted in HDR.
Bright enough to fight most glare.
Small highlights are muted in HDR.
The KOORUI S2741LM has a great response time. There's minimal blur for the most part, but there's inverse ghosting at low refresh rates.
Consistently fast response time.
Inverse ghosting at low refresh rates.
The KOORUI S2741LM has good HDR picture quality. Its local dimming feature helps it display deep blacks with minimal haloing. However, small highlights are muted due to black crush.
Deep blacks with local dimming.
Displays wide range of colors.
Small highlights are muted in HDR.
The KOORUI S2741LM has decent SDR picture quality. Blacks look gray without its local dimming feature, so you need to enable it for deep blacks. It also displays a wide range of colors in SDR.
Displays wide range of colors.
The KOORUI S2741LM has okay color accuracy. It's inaccurate before calibration, and even its dedicated sRGB mode has issues out of the box. You need to calibrate it for accurate images.
Colors are accurate after a full calibration.
sRGB mode is inaccurate out of the box.
Low contrast ratio without local dimming.
Performance Usages
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Differences Between Sizes And Variants
We bought and tested the 27-inch KOORUI S2741LM, which is the only size available. There are similar models available in KOORUI's lineup, like the S2721PM. You can see the differences below, but the results are only valid for this model.
| Name | Size | Panel Type | Backlighting & Zones | Native Refresh Rate & Resolution | Dual Mode |
|---|---|---|---|---|---|
| S2741LM | 27" | IPS |
Mini LED 1,152 Dimming Zones |
4k @ 160Hz | 1080p @ 320Hz |
| S2721PM | 27" | IPS | Mini LED 1,152 Dimming Zones |
1440p @ 200Hz | No |
Our unit's label indicates the model name is MG27K33U, with the marketing name being the S2741LM.
Popular Monitor Comparisons
The KOORUI S2741LM is a mid-range 4k gaming monitor. With a 4k, 160Hz native resolution and refresh rate that you can change to 1080p, 320Hz, it gives you versatility for playing different types of games. It uses Mini LED backlighting with an effective local dimming feature that improves picture quality in HDR. Competing against models with the same specs and features, like the Acer Nitro XV275K P5biipruzx and the MSI MPG 274URDFW E16M, it offers a cheaper alternative to higher-end OLEDs while still providing good overall picture quality. It also has better motion handling than the Acer and MSI. If you're in the market for a 4k gaming monitor in its price range, you can't go wrong with it. Otherwise, there are cheaper Mini LED options available with a lower resolution, like the AOC Q27G3XMN.
Also see our recommendations for the best Mini LED monitors, the best 4k gaming monitors, and the best HDR gaming monitors.
The KOORUI S2741LM and the INNOCN 27M2V are both Mini LED monitors. While they each have a 4k resolution with a 160Hz refresh rate, the main difference is that the KOORUI has a dual-mode feature to boost it to 320Hz with a lower 1080p resolution. They're similar besides that, but the INNOCN is more accurate before any sort of calibration.
The KOORUI S2741LM and the AOC Q27G3XMN are both Mini LED monitors. The KOORUI is higher-end with a higher 4k resolution and more features, like a USB hub and a dual-mode feature. The KOORUI also has a wider viewing angle, so it's the better choice for co-op gaming. However, the AOC has a higher native contrast ratio, meaning it has better picture quality if you don't use its local dimming feature. Despite the KOORUI having many more dimming zones, both their local dimming features are effective at improving black levels without too much haloing.
The KOORUI S2741LM and the MSI MPG 274URDFW E16M are competing Mini LED monitors. They share many of the same specs, including the number of dimming zones, dual-mode features, and USB ports. The KOORUI has a few advantages as its local dimming feature performs better in SDR, and it has less haloing in HDR. The KOORUI also gets brighter, making it the better choice to use in well-lit rooms. Plus, the KOORUI has better motion handling with less blur behind fast-moving objects.
The Acer Nitro XV275K P5biipruzx and the KOORUI S2741LM are competing Mini LED monitors. They share many of the same specs, including the number of dimming zones, dual-mode features, and USB ports. The KOORUI has a few advantages as you can use its local dimming in SDR, which isn't the case with the Acer. The KOORUI also has less haloing in HDR. The KOORUI even gets brighter, making it the better choice to use in well-lit rooms. Plus, the KOORUI has better motion handling with less blur behind fast-moving objects.
We buy and test more than 30 monitors each year, all of which we purchase ourselves, without cherry-picked units or samples. We put a lot into each unbiased, straight-to-the-point review, and there's a whole process from purchasing to publishing, involving multiple teams and people. We do more than just use the monitor for a week; we use specialized, custom tools to measure various aspects and deliver objective, data-driven results. We also consider multiple factors before making any recommendations, including the monitor's cost, its performance compared to the competition, and whether it's easy to find.
Test Results
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