MSI MAG401QR 40-inch UWQHD 155Hz gaming monitor

UWQHD: The MSI MAG401QR is a 40-inch ultrawide gaming monitor with a 3440 x 1440 IPS panel, 21:9 aspect ratio and 155 Hz refresh rate. Its broad screen and high refresh rate suit immersive gaming and side-by-side work, but its roughly metre-wide footprint needs planning.

At a glance

The 21:9, 3440 x 1440 panel provides a wide workspace and expansive game view.
A 155 Hz refresh rate is aimed at smoother motion in fast-paced games.
KVM functionality is claimed for controlling two connected PC systems with one keyboard and mouse set.
USB-C is claimed to provide up to 65W device power, alongside DisplayPort and HDMI inputs.
Anti-glare, blue-light reduction and anti-flicker features are listed.

Price

£298.97Save 14%

Reference price: ~~£348.95~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

The wide 40-inch screen can accommodate broad game scenes or multiple work windows.
155 Hz refresh rate and FreeSync are gaming-focused features.
KVM and USB-C charging could simplify a compatible multi-device desk setup.

Cons

Its 95 cm listed width requires substantial desk space.
HDMI inputs are claimed to support up to 100 Hz at the listed maximum resolution, below the DisplayPort 155 Hz claim.

Technical specifications

30 specifications

Identity
Brand	MSI
Model	MSI MAG401QR

Display and video
Screen size	40 Inches
Screen technology listed	LCD
Resolution	3440 x 1440 Pixels
Aspect ratio	21:9
Panel type	IPS
Refresh rate	155 Hz
Response time	1 Milliseconds
Contrast ratio	1000:1
Brightness	300 Candela per Square Meter
Viewing angle	178 Degrees
Screen finish	Matte
Special features	Anti Glare Screen, Blue Light Filter, Flicker-Free
HDR	VESA DisplayHDR 400
Colour gamut value	118.0
Colour gamut	sRGB 118%, DCI-P3 94%
Colours	1.07 billion colours

Ports and functions
Video interfaces	DP 1.4a, HDMI 2.0b
HDMI ports listed	1
Video out ports listed	2
USB-C charging	up to 65W
Adaptive sync	FreeSync
KVM	Built-in KVM technology
Gaming app	Gaming Intelligence App supported

Dimensions and installation
Dimensions (D x W x H)	29D x 95W x 53H centimetres
Mounting types listed	Wall Mount
Form factor	rectangular

Power and warranty
Voltage	240 Volts
Warranty	2 Years Manufacturer Warranty

What to know before buying

Listing details to confirm

Listing details are contradictory or inconsistent: the ports section lists one HDMI port and two video-out ports, while feature text claims dual HDMI 2.0 ports and USB Type-C, and a separate port summary specifies DP 1.4a and HDMI 2.0b. Brightness is listed as 300 Candela per Square Meter in the details but 400 nits in HDR feature text. The 1ms response-time claim does not consistently identify its measurement mode. Confirm the exact port layout, brightness and response-time basis for the selected listing. The listed dimensions are 95 cm wide, which is relevant when checking desk fit.

What’s in the box

Included

Stand

Who is it for?

A good fit for

Players who want a 21:9 ultrawide view and a high refresh rate for fast-paced games.
People who need a large display for gaming and productivity and have room for a 95 cm-wide monitor.
Users who can benefit from the listed KVM feature and USB-C charging, after confirming the ports on the listing.

Less suited to

Small desks or setups that cannot accommodate a 95 cm-wide monitor.
Buyers who require confirmed port counts or a clearly established brightness and response-time specification without checking the listing details.

MSI MAG401QR 40-inch UWQHD 155Hz gaming monitor · photo 2 — Additional product photo 2

Customer reviews on Amazon

4 / 5 · 74 ratings

5 stars58%58%
4 stars19%19%
3 stars3%3%
2 stars6%6%
1 star14%14%

Customer feedback is generally favourable about screen and image quality, colours and contrast, and some customers report benefits for gaming and productivity. Reports about brightness are mixed, as are reactions to the size, with one customer describing it as impractical at around a metre wide. Durability feedback is also mixed, including a report of a unit breaking after two months. These experiences matter alongside the listed 40-inch panel and 95 cm width, but do not establish how an individual unit will perform.

Positive themes

Customers praise screen and image quality, including colours and contrast.
Customers report positive gaming and productivity experiences.

Mixed feedback

Size receives mixed reactions, with one customer finding the roughly metre-wide screen impractical.
Durability feedback is mixed, including a report of a unit failing after two months.
Brightness feedback is mixed.

Frequently asked questions

What resolution does the MSI MAG401QR list?

The listing gives a maximum display resolution of 3440 x 1440 Pixels. It also describes the screen as QHD Wide 1440p.

Can it reach 155 Hz over HDMI?

The manufacturer feature text claims DisplayPort 1.4a supports 3440 x 1440 at 155 Hz and HDMI 2.0 supports 3440 x 1440 at 100 Hz maximum. The listing's port-count details conflict, so confirm the selected model's inputs.

Does the monitor include KVM and USB-C charging?

Manufacturer feature text claims built-in KVM for two PC systems and USB-C power up to 65W. The product details do not consistently enumerate these ports, so verify the configuration before buying.

How much desk space does it need?

The stated dimensions are 29D x 95W x 53H centimetres. Allow for its 95 cm width and check the space available on your desk.