7 Best 40 Inch 4K Monitor Reviews | Why Go for 40″ High Resolution Monitors?

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Whether you’re a gamer or a professional looking to upgrade their productivity you probably have an interest in getting the best 40 inch 4k monitor you can for your work or entertaining. For those who don't know, the term 4k refers to the horizontal scale of your monitor's resolution meaning the first part of the resolution is approximately 4,000. Resolution refers to the scale of your display and the most important thing to know about it is that the bigger the numbers associated with your resolution, the clearer your images should be when viewed on that display or screen. 

3 Top 40 Inch 4K Monitors

Electronics 42.5Electronics 42.5

This is a 43-inch, 42.5-inch visible, monitor from LG. The display has a 16:9 aspect ratio and it is capable of producing a resolution of 3840 by 2160 with a 60 Hertz refresh rate.

  • HDCP Protection
  • Capable for Gaming
  • Good Speakers

LG 43UD79-B 43-inch 4KLG 43UD79-B 43-inch 4K

This bundle comes with the previous monitor entry as well as a 6-outlet surge adapter, a night light, a 6-foot high-speed HDMI cable, and a large bottle of universal screen cleaner.

  • Surge Protection
  • HDMI Cable Included
  • Large Supply of Screen Cleaner

LG 49WL95C-W 49-InchLG 49WL95C-W 49-Inch

This is a curved monitor option from LG that is 49 inches in size and the aspect ratio is 32:9. The resolution displayed on this monitor is 5120 by 1440 at a 60 Hertz refresh rate.

  • DisplayPort Input
  • VESA Compatible
  • Good Speakers

Why Go for 40 inch 4K Monitors?

Bigger is better, right? In all seriousness, there are two parts of this question to dissect. Why go for a 40-inch monitor and why go for a 4k monitor? The two are not inherently linked so it is important to discuss them separately before discussing them together to provide the best advice for picking out the best 40 inch 4k monitor for you.

The primary reason you would want a 40-inch monitor is because it is a truly massive screen size. Having a screen this large provides a greater amount of screen real estate for you to work with which is especially important if you are opposed to using multiple monitors because it gives you more space to separate each application into on your single screen. 

The larger your screen is, the more applications you can look at simultaneously which provides an increase in productivity that you would have a hard time finding on a smaller screen. Screen size is usually measured in inches from one corner to another diagonally across a monitor. This means that a 40 inch monitor is 40 inches across from bottom-left corner to top-right corner.

Having a 4k monitor can be very important if you work professionally with image editing or video production because an increase in resolution provides an increase in image quality. The previous standard was 1080p or 1920 by 1080 resolution. With a 4k resolution, the images and videos you watch will be much clearer and you will be capable of noticing things that wouldn't have been visible at a lower resolution.

Best 40 Inch 4K Monitor Reviews

This is a 43-inch, 42.5-inch visible, monitor from LG. The display has a 16:9 aspect ratio and it is capable of producing a resolution of 3840 by 2160 with a 60 Hertz refresh rate. The panel type is an In-Plane Switching or IPS type. It supports High-bandwidth Digital Content Protection (HDCP) version 2.2 which protects against your digital video or audio content being copied as it travels.

LG Electronics 42.5LG Electronics 42.5

It also has on-screen controls for the screen split feature which is especially handy if you are working with an operating system that does not already implement that feature. This should certainly help with increasing productivity.

It has USB type C connectivity already implemented into the monitor itself and ships with 4 HDMI ports for connecting to your system of choice.

It is a flat screen that does not support FreeSync or tilt. It has speakers built into the frame and they are surprisingly good for monitor speakers. 

LG Electronics 42.5” Technical Specifications

Screen Size

42.5 inches

Display Panel

In-Plane Switching (IPS), LED

Max. Resolution

3840 x 2160 (4k)

Refresh Rate

60 Hz

Response Time

5 milliseconds

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

No

Features

HDCP 2.2, Screen Split

Ports / Connectivity

HDMI, USB-C

If you are using them for entertainment like gaming or listening to music you should probably get some specialized speakers for that, but these work in a pinch and they are some of the best built-in speakers I've ever heard. 

This monitor has a response time of 5 milliseconds. This response time combined with its 60 Hertz refresh rate leaves this monitor at the very bottom end of performance concerning gaming, but the visual clarity should be unmatched by anything that a 1080p monitor could produce.

There are some downsides to this monitor. The lack of DisplayPort inputs holds this monitor back greatly as those are the preferred inputs for the best 4k monitor. It also has a fairly narrow viewing angle. Looking directly at the monitor works great but if I try to look from the side I get shadows along the borders that might cover necessary parts of the user interface.

Pros

  • HDCP Protection
  • Capable for Gaming
  • Good Speakers

Cons

  • No DisplayPort inputs
  • Narrow viewing angle
  • No FreeSync

This bundle comes with the previous monitor entry as well as a 6-outlet surge adapter, a night light, a 6-foot high-speed HDMI cable, and a large bottle of universal screen cleaner. A great deal and well worth it for the security that it will provide for your 4k computer monitor.

If you decide to go with the previous LG monitor then this bundle should provide all the tools you need to keep a 40 inch computer monitor well-maintained and protected from problems like power surges and outages.

A surge protector is a very important piece of equipment, mine has saved my computer from power surges several times and every time I have been thankful to not have to pay large sums of money for replacement parts.

LG 43UD79-B 43-inch 4KLG 43UD79-B 43-inch 4K

LG 43UD79-B 43-inch 4k Technical Specifications

Screen Size

42.5 inches

Display Panel

In-Plane Switching (IPS), LED

Max. Resolution

3840 x 2160 (4k)

Refresh Rate

60 Hz

Response Time

5 milliseconds

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

No

Features

HDCP 2.2, Screen Split

Ports / Connectivity

HDMI, USB-C

Pros

  • Surge Protection
  • Large Supply of Screen Cleaner
  • HDMI Cable Included

Cons

  • Night light?

This is a curved monitor option from LG that is 49 inches in size and the aspect ratio is 32:9. The resolution displayed on this monitor is 5120 by 1440 at a 60 Hertz refresh rate. The type of monitor is an In-Plane Switching (IPS) which should serve excellently for image and video editing work.

LG 49WL95C-W 49-Inch CurvedLG 49WL95C-W 49-Inch Curved

The massive scale of this monitor lends itself well to increasing productivity in a professional capacity while also providing a vast expanse of screen real estate for hobby work.

This monitor has a 5-millisecond response time which makes it, combined with the 60 Hertz refresh rate, on the lower end of gaming monitors, but it is extremely large and curved which means it supports larger resolutions for greater image clarity. This could be a good option for gaming if you have your heart set on a 40” monitor with a 4k resolution.

LG 49WL95C-W 49 inch Technical Specifications

Screen Size

49 inches

Display Panel

In-Plane Switching (IPS), LED

Max. Resolution

5120 x 1440 (4k)

Refresh Rate

60 Hz

Response Time

5 milliseconds

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

No

Features

HDR10, Tilt-able, Swivel, Adjustable Height, VESA Compatible

Ports / Connectivity

HDMI, USB-C, Audio out

It has 2 HDMI inputs as well as a Display Port input for connectivity. As a bonus it also has a headphone output and a USB type C port. This gives it a variety of inputs and outputs and makes it a very versatile monitor.

The stand that the monitor is shipped with supports height adjustment, tilting and swivel which is uncommon with monitors of this size.

The monitor is VESA compatible and can be mounted on a wall, but you should be careful with this as the monitor is very heavy. Make sure to purchase mounting equipment that can handle the weight of this beast.

This monitor ships with built-in speakers that are surprisingly functional for monitor speakers. They can serve well enough if you don’t have anything else but specialized, separate speakers are preferred for most uses.

Overall, this monitor is an excellent option for widescreen use and should serve very well in a variety of uses if you want a curved 40-inch-plus monitor for your primary display.

Pros

  • DisplayPort Input
  • VESA Compatible
  • Good Speakers

Cons

  • Very heavy

This monitor from ViewSonic is 43 inches, 42.5 visible, with a 16:9 aspect ratio. It is capable of producing a resolution of 3840 by 2160 and a 60 Hertz refresh rate. The panel type is an In-Plane Switching or IPS type. It is designed for wall mounting but ships with a stand for those that aren't interested in wall-mounting.

The screen comes enhanced with a Blue-light Filter and Flicker-free technology so you don’t have to be concerned with prolonged use damaging your eyes or having to contend with eye strain and fatigue.

The connectivity ports featured include HDMI 2.0, USB, DisplayPort, and Mini DisplayPort inputs. This is excellent news because DisplayPort inputs are the preferred and recommended option for connecting 4k monitors to your system.

ViewSonic VX4380-4K 43 Inch Frameless Widescreen IPS 4KViewSonic VX4380-4K 43 Inch Frameless Widescreen IPS 4K

ViewSonic VX4380-4k 43 inch Technical Specifications

Screen Size

42.5 inches

Display Panel

In-Plane Switching (IPS), LED

Max. Resolution

3840 x 2160 (4k)

Refresh Rate

60 Hz

Response Time

12 milliseconds

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

No

Features

Flicker-Free, Blue Light Filter, Energy Efficient

Ports / Connectivity

HDMI 2.0, DisplayPort, Mini DisplayPort

ViewSonic has a proprietary program that works with this monitor called Multipicture which allows for up to four split windows to be viewed simultaneously which could be especially handy if you aren't using an operating system with that functionality built-in.

The monitor has an eco-mode feature for saving energy and complies with energy star 7.0 and EPEAT certification. This should help to save power which could be handy in a power outage by helping to ensure a backup power supply will last as long as possible.

This monitor responds with a time of 12-milliseconds which is extremely poor for gaming. This monitor is not recommended for a gaming enthusiast that plans to use this for that purpose. I found the delay to be very noticeable and inconvenient while gaming.

Tilt is supported in a minor capacity. You can tilt your screen five degrees backward or twelve degrees forward. There is no height adjustment functionality.

In short, this monitor is a good option to enhance productivity with an increase in screen real estate for the price offered, but it is not recommended for use with serious gaming. It has a variety of connectivity options and is energy efficient.

Pros

  • Tilt Capable
  • Energy Efficient
  • Wall Mounting Capable

Cons

  • Bad for gaming

This monitor, courtesy of Philips Computer Monitors, has a 43-inch, 42.51-inch viewable, screen size with a 16:9 aspect ratio. It can support a resolution of 3840 by 2160 with a 60 Hertz refresh rate. The type of monitor is a Multidomain Vertical Alignment (MVA) so it is versatile and capable of being used for a variety of purposes.

Philips Momentum 43Philips Momentum 43

It has a 4 millisecond response time which is the best on this list but still low for gaming performance. The 60 Hertz refresh rate and this response time together make for a low-end gaming monitor but the added visual clarity of the higher resolution could make up for that in non-competitive gaming.

It is capable of tilt from negative 5 degrees to 10 degrees forward. It is also capable of height adjustment and swivel. All of that together makes for many possibilities for creative ways to place this on a desk to maximize workspace and provide the best viewing angle for your specific situation

Philips Momentum 43” Technical Specifications

Screen Size

42.5 inches

Display Panel

Vertical Alignment (VA), QLED

Max. Resolution

3840 x 2160 (4k)

Refresh Rate

60 Hz

Response Time

4 milliseconds

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

FreeSync

Features

Flicker-Free, Blue Light Filter, HDR, Tilt-able, Adjustable Height, Swivel

Ports / Connectivity

HDMI, DisplayPort, DVI-D, VGA

It does have Flicker-free technology and supports FreeSync which is fantastic for gaming smoothness and eliminating tearing or stuttering.

Regarding connectivity, there are a variety of inputs and outputs to choose from. The monitor has an HDMI port, a DisplayPort, a DVI-D, and a VGA. That is a lot of backward-compatibility and a lot of versatility for a monitor this new.

It is High Dynamic Range (HDR) compatible which should make for stunning visual clarity and combined with the 4k resolution should make for a very eye-catching look to any images, movies, or games you view.

Something you may experience when using this is a rapid burn-in effect though I haven’t seen any signs that it is permanent. It is recommended that you be careful with how long you keep a static image on the screen and remember not to leave the monitor on when not in use.

Pros

  • HDR compatible
  • Versatile Connectivity
  • Flicker-free Technology

Cons

  • Vulnerable to burn-in

This is Dell’s answer to the 43-inch, 42.51-inch viewable, 4k monitor and it delivers with a 16:9 aspect ratio and a supported resolution of 3840 by 2160 at 60 Hertz. It is an In-Plane Switching (IPS) type monitor so it should provide a highly accurate color quality for professional image and video editing work.

Dell's monitor has a high response time at 8 milliseconds, not ideal for gaming especially with a 60 Hertz refresh rate. You could probably get by with this for casual, hobby gaming but if you are a serious gamer then you will notice the low response time when gaming competitively.

 I found it to be manageable for games that didn’t require a fast reaction time but forget trying to play an FPS with this monitor.

Dell P Series 42.51Dell P Series 42.51

Dell P Series 42.51” 4k Technical Specifications

Screen Size

42.51 inches

Display Panel

In-Plane Switching (IPS), LED

Max. Resolution

3840 x 2160 (4k)

Refresh Rate

60 Hz

Response Time

8 milliseconds

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

No

Features

Multi-Screen View

Ports / Connectivity

HDMI, DisplayPort, Mini DisplayPort, VGA

This monitor comes with 2 HDMI ports, a DisplayPort, a Mini Display Port, and a VGA port as options for connectivity. Be careful using the HDMI ports or the VGA because they will only allow a 30 Hertz refresh rate which is less than ideal for a lot of uses.

One of the downsides of this particular monitor is that it will have some minor edge shadows when viewed from certain angles but it shouldn't be an issue when looking at it head-on. Another downside is that the audio input is non-functional unless you are using the VGA port.

The speakers on this monitor are surprisingly good though much like with any other monitor they are not ideal for primary audio use and should only be used as a backup in case of some kind of equipment failure or lacking any other option.

Altogether, this is a decent option as a primary display for professional work if you are interested in enhancing your multi-tasking capabilities and increasing your productivity.

Pros

  • Good Speakers
  • DisplayPort Inputs

Cons

  • Not good for gaming

Another option from Philips Computer Monitors and, much like the last one, it is a 43-inch, 42.51-inch viewable, monitor with a 16:9 aspect ratio. This one also has a 3840 by 2160 screen resolution and a 60 Hertz refresh rate. It is an In-Plane Switching (IPS) style monitor and has support for viewing over 1 billion colors which should significantly aid professional work with image and video editing or viewing.

Philips BDM4350UC 43Philips BDM4350UC 43

This option’s response time is higher at 5 milliseconds which makes it slightly worse for gaming than the other Philips Computer Monitors option though not by much. If you are a gamer looking at this for your primary monitor it isn't recommended but should work alright in a casual setting.

This monitor supports Philips MultiView technology which allows both Picture-by-Picture with 4 inputs and Picture-in-picture with 2 inputs. If the snapping feature of the Windows 10 operating system isn’t enough for you then this will certainly kick your multitasking and productivity up a notch.

Philips BDM4350UC 43” Technical Specifications

Screen Size

42.51 inches

Display Panel

In-Plane Switching (IPS), LED

Max. Resolution

3840 x 2160 (4k)

Refresh Rate

60 Hz

Response Time

5 milliseconds

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

No

Features

MultiView, USB Fast Charge

Ports / Connectivity

HDMI 2.0, DisplayPort 1.2, VGA, Audio in/out, USB 3.0

There are 2 HDMI 2.0 inputs and 2 Display Port 1.2 outputs as well as a VGA and an Audio in/out for connectivity options. That is a lot of options and they are all good ones so you shouldn’t have any issues with refresh rate no matter which port you use.

It has speakers built-in and there are 4 USB 3.0 ports on the back of the monitor, one of which is fast charging, which makes the monitor even more versatile and useful. I found the fast-charging USB port to be great for charging my phone.

Pros

  • Philips MultiView
  • Extra USB 3.0 Ports
  • Versatile Connectivity

Cons

  • Not ideal for gaming

Gaming and Entertainment Performance Of 40 Inch Monitors

If you are a gaming or streaming enthusiast then you will likely hear the term “4k resolution” mentioned very frequently. This is because having a 4k gaming monitor enhances the visual quality of games and streams that you play or watch. 

If you are gaming then this will provide an opportunity to notice things that you otherwise wouldn't have been able to which can have a proportional increase to your performance in a competitive scenario for those that are fans of MOBAs like League of Legends or FPS shooters like Call of Duty. It could also enhance your enjoyment of visual aspects of the environment or characters that wouldn't be casually apparent at a lower resolution for those that are fans of RPGs like Dragon Age or Mass Effect.

HDR media Support

High Dynamic Range (HDR) is the current new kid on the block for Visual Technologies in television and gaming. The term may be familiar to those that have a working knowledge of photography. Essentially it is the process of making images as close to the visual clarity of the human eye as possible. 

Mostly this is accomplished by enhancing the ability to represent the transition between darkness and light and their effect on colors. Using High Dynamic Range should provide an increase to visual quality and make colors stand out without negatively affecting light or shadows.

Viewing Distance

The distance between you and the monitor you are viewing will affect your ability to distinguish the difference in the quality of the images of a 4k monitor. The larger a monitor is, the further away you can be from it before you stop noticing the increase in quality. A 40 inch 4k monitor will give you a few feet of optimal viewing distance before it is indistinguishable from a High Definition (HD) display.

Connectivity

The preferred method of connecting a 4k monitor to your system is through a DisplayPort cable. Unfortunately, there are some unreliable DisplayPort cables out there so you will have to be particularly careful about using any that come with your monitor and make sure that they are certified DisplayPort cables.

Some 4k monitors will support HDMI cables, but there is the unfortunate circumstance of HDMI version 1.4 locking your refresh rate to 30 Hertz which isn’t good. You’ll want to make sure that you are using an HDMI 2.0 or better to ensure a good refresh rate on your monitor.

Any Drawbacks of Large Monitors?

If your monitor is too large you may have to sit a little further away than you are used to to avoid having to turn your head to see certain parts of the screen.

Larger monitors also take up more space which can be a problem if you don’t have a lot of desk space to work with. This could be mitigated by wall-mounting your monitor if that option is available to you.