7 Best 40 Inch 4K Monitor Reviews of 2020 | Which is the #1 Pick?

Updated: June 8th, 2020By: BrantonMonitors, ReviewsLeave a Comment

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Bigger monitors are better, right? Well, that isn’t always the case, but a bigger monitor will certainly provide a great increase to productivity and multitasking if used appropriately. If this interests you then you will want to make sure you have the best 40 inch 4k monitor you can. A 40 inch monitor is just the right size to get the largest increase to your efficiency without suffering from the drawbacks of an impractically large screen. If that isn’t your thing, then check out all our monitor reviews to find one that suits your needs.

Favorite 40 Inch 4k Monitors Comparison

Editor's Rating: 4.4/5
  • Supports HDCP for HDMI
  • Has Decent Speakers
  • Has Gaming Specs
Editor's Rating: 4.2/5
  • Protection From Electrical Problems
  • Connection Option Provided
  • Good Quantity of Cleaning Supplies
Editor's Rating: 4.1/5
  • Massive Screen Size
  • Supports Gaming Activities
  • VESA Compatibility

Why Opt for a 40 inch 4K Monitor?

Up to a certain point, a bigger monitor can only be a good thing. There are plenty of reasons to get a 40 inch 4k monitor, but to really get in-depth with this question you have to separate it into two parts; a 40” monitor is not always 4k and the best 4k monitor is not always 40 inches, so you have to understand the reasons for getting either of them, not just both together.

Getting a 40 inch computer monitor is usually something you would do to increase productivity at work. You do it for the screen real estate more than anything else. A larger screen allows you to view more windows at the same time on one screen, which means you need less equipment to work on multiple things at once.

A 4k computer monitor is appreciated by most people for its clarity and quality. The higher the resolution of your monitor the better images and videos will look on your screen which can be very important when working professionally on those things. You might also look for a 4k gaming monitor if you spend a lot of time gaming.

Having a 40 inch 4k monitor will give you the best of both worlds. You can work on multiple applications at once and you can see them in the highest quality possible, so this would be a video or image editor’s dream monitor.

Best 40 Inch 4k Monitor Reviews

Editor's Rating: 4.4/5

The first of the 4k monitors on this list is the 42.5-inch 43UD79-B from LG Electronics. It is lit using LED technology with an IPS panel. 


You may be surprised to see that this monitor does not have 4,000 pixels in the horizontal section of its resolution but is still labeled 4k. 

Because of how aspect ratios work with resolutions and the size of the monitor itself, 3840 x 2160 is considered the start of the 4k resolution standard.


The 43UD79-B comes with the ability to support High-bandwidth Digital Content Protection (HDCP) which is a security measure meant to shield your data from being interfered with or stolen during transit from your device to your monitor.


If the operating system you currently use with your device doesn't allow for you to split your windows onto different parts of the screen you will likely be pleased to know that this monitor comes with its own ScreenSplit software built-in and can be controlled directly from the monitor. This will allow you to use your massive screen to view multiple applications, windows, or documents at the same time and therefore increase your ability to multi-task tremendously.


For added convenience, there is a USB-C hub with 4 ports built into the frame to allow you to connect multiple USB based devices to your system if the ones that are already on your device aren't enough. I usually use these for charging my phone or plugging in my headset and other peripherals of that nature.

LG Electronics 43UD79-B

Header

Screen Size

42.5-inch

Display Panel

LED, In-Plane Switching (IPS)

Max. Resolution

3840 x 2160 (4k)

Refresh Rate

60 Hertz

Response Time

5 ms

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

No

Features

ScreenSplit, HDCP, USB-C, Wide View Angle, VESA Compatible

Ports / Connectivity

HDMI

Monitor comes with its own ScreenSplit software built-in and can be controlled directly from the monitor. It allows you to resize and display multiple windows at once, with 14 different options.

The speakers that come integrated with the frame are nothing special when compared to other audio options, but when you compare them to other monitor speakers you realize that they are special in that they actually work. Most monitor speakers are so terrible so as to be not worth using, but that is not the case with these. They work decently and could serve as your primary audio option if you had no other option without trouble. I still prefer more specialized devices for that, but I was impressed that these even worked.


The response time and refresh rate are nothing impressive either, but they are sufficient for gaming, if just barely, at 5 milliseconds and 60 Hz respectively. This means that, whether you’re playing on console or PC, you can play with the unmatched visual clarity and field of view provided by a 40 inch monitor with 4k resolutions as long as your device of choice can support it.


The monitor is not perfect, despite the many great things about it. It has a narrow angle of view which means you may notice some shadows on the sides, top, and bottom of the screen depending on where you sit in relation to the screen. This can be especially inconvenient if these shadows cover important UI elements.


It also only allows for HDMI for connecting to other devices and does not have a DisplayPort connection which can be frustrating for a monitor of this type because DisplayPort is the superior connection type for resolutions this high.

Pros

  • Supports HDCP for HDMI
  • Has Decent Speakers
  • Has Gaming Specs

Cons

  • Only has one connection option

Editor's Rating: 4.2/5

If you are particularly interested in the previous entry on this list then this bundle is the best way to buy it. Along with the monitor, you also get a surge protector with 6 outlets to keep your system safe in the event of power outages and surges, you also get an HDMI cable that is 6-feet long and is capable of high speeds for connecting your new monitor to your devices, as well as some screen cleaner and a night-light.

LG 43UD79-B 43-inch 4K Ultra HD IPS LED Monitor Bundle

Header

Screen Size

42.5-inch

Display Panel

LED, In-Plane Switching (IPS)

Max. Resolution

3840 x 2160 (4k)

Refresh Rate

60 Hertz

Response Time

5 ms

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

No

Features

ScreenSplit, HDCP, USB-C, Wide View Angle, VESA Compatible

Ports / Connectivity

HDMI

These are all things you will likely end up purchasing separately anyway, except for the nightlight I’m not sure why that is included, which means this bundle is an excellent way to get them all together and save a little money while you do it. I especially like the fact that it comes with a surge protector as they are extremely important and often overlooked.

Pros

  • Protection From Electrical Problems
  • Connection Option Provided
  • Good Quantity of Cleaning Supplies

Cons

  • Night light included for some reason

Editor's Rating: 4.1/5

If you thought 40 inches was massive, try almost 50 with the 49WL95C-W from LG Electronics. This 49-inch LED monitor displays a resolution that is higher than 4k, 5120 x 1440. It uses an IPS panel that should make for a better time when editing videos and images. 

Having that much screen real estate should mean you can look at before, current, and reference images all at once without having to switch between them.

LG 49WL95C-W 49-Inch Curved 32: 9 Ultrawide

Header

Screen Size

49-inch

Display Panel

LED, In-Plane Switching (IPS)

Max. Resolution

5120 x 1440 (4k)

Refresh Rate

60 Hertz

Response Time

5 ms

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

No

Features

Compatible, Adjustable Height, Swivel, Tilt, HDR10, Audio Out, USB-C, Curved

Ports / Connectivity

HDMI

The response time and refresh rate are sufficient for gaming at 5 milliseconds and 60 Hz, but it isn’t anything impressive in that regard.


The monitor is curved which is why it can support a resolution that is higher than the usual standard for 4k. It is wider than your average monitor which means it will fill more space on your desk and leave less space for your accessories, peripherals, and any other things you keep there. This can be incredibly inconvenient, but it may be worth it to you for the extremely large screen.

Pros

  • Massive Screen Size
  • Supports Gaming Activities
  • VESA Compatibility

Cons

  • Might be too large for some users

Editor's Rating: 4.0/5

The VX4380-4k from ViewSonic is a 42.5-inch LED monitor that uses an IPS panel. It is up to the usual standards of ergonomic design for a ViewSonic monitor. It includes both eye protection features and energy efficiency in a thin frame that should make it especially convenient to use and implement in your current or new setup.

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

Header

Screen Size

42.5-inch

Display Panel

LED, In-Plane Switching (IPS)

Max. Resolution

3840 x 2160 (4k)

Refresh Rate

60 Hertz

Response Time

12 ms

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

No

Features

Energy Efficient, Blue Light Filter, Flicker-Free, Thin Frame, Wide View Angle

Ports / Connectivity

Mini DisplayPort, DisplayPort, HDMI

Unfortunately, this is definitely not designed with gaming in mind. The truly massive 12 millisecond response time is not even close to acceptable for gaming so you’ll need a separate monitor if you plan to be gaming on your PC.


ViewSonic has also included its proprietary Multipicture software for added convenience with this monitor. It allows you to split your screen into 4 sections which can be viewed at the same time.Anyone that works in graphic design or video editing will surely appreciate this monitor for its many comfort features, but gamers should look elsewhere.

Pros

  • Ergonomic Design Features
  • Very Energy Efficient
  • Has DisplayPort Compatibility

Cons

  • Does not meet serious gaming standards

Editor's Rating: 3.9/5

The 436M6VBPAB from Philips Computer Monitors is a 42.5-inch QLED monitor. 

It matches the ergonomic design of the ViewSonic option while also providing a similar standard of eye protection design and software for what is currently a cheaper price.

Philips Momentum 43" Console Gaming Monitor, 4K UHD 

Header

Screen Size

42.5-inch

Display Panel

QLED, Vertical Alignment (VA)

Max. Resolution

3840 x 2160 (4k)

Refresh Rate

60 Hertz

Response Time

4 ms

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

FreeSync

Features

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

Ports / Connectivity

VGA, DVI-D, DisplayPort, HDMI

It also has very good support for gaming for its size and resolution. It has a 60 Hz refresh rate and a 4-millisecond response time which is faster than any of the other options so far. It also supports FreeSync technology which means this is the ideal monitor for AMD GPU users that want a large 4k monitor to game on.

Pros

  • Very good support for gaming
  • Ideal for AMD GPU users
  • Price friendly

Cons

  • It doesn't come with remote controller

Editor's Rating: 4.0/5

Dell is known for its excellent monitors and the P4317Q is no exception. It is a 42.51" LED monitor that uses IPS panels for its display. It has an especially thin frame and implements anti-glare coating on the screen so that you don’t have to worry about the light level of your environment and can use this monitor anywhere, anytime with no inconvenience getting in your way.

Dell P Series 42.51" 4K Monitor

Header

Screen Size

42.51-inch

Display Panel

LED, In-Plane Switching (IPS)

Max. Resolution

3840 x 2160 (4k)

Refresh Rate

60 Hertz

Response Time

8 ms

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

No

Features

Thin Frame, Multi-Screen View, Wide View Angle, Anti-Glare, Dell Display Manager

Ports / Connectivity

VGA, Mini DisplayPort, DisplayPort, HDMI

It has an 8 millisecond response time which is quite bad for gaming, so gamers should look at another option. That said, a professional that is looking for an upgrade to their setup might be interested in this monitor for its Multi-screen View technology and the especially wide viewing angle.

Pros

  • Has DisplayPort Compatibility
  • Screen is Protected from Glare
  • Very Thin Frame

Cons

  • Not ideal for gaming

Editor's Rating: 3.7/5

Another option from Philips Computer Monitors, the BDM4350UC is a 42.51-inch LED monitor with IPS panels. 

It has a wide variety of connectivity options, more so than any other monitor on this list which makes the BDM4350UC the most versatile option in that regard.

Philips BDM4350UC 43" LED Monitor, 4K UHD IPS

Header

Screen Size

42.51-inch

Display Panel

LED, In-Plane Switching (IPS)

Max. Resolution

3840 x 2160 (4k)

Refresh Rate

60 Hertz

Response Time

5 ms

Aspect Ratio

16:9

Speakers

Yes

G-Sync / FreeSync

No

Features

USB Fast Charge, MultiView, Audio In/Out, USB 3.0, 4 Year Warranty

Ports / Connectivity

VGA, DisplayPort, HDMI

It comes with a USB 3.0 hub integrated with the frame and a fast-charging option implemented as well. It also has audio ports so that you can easily connect your audio peripherals to your system if the internal speakers don’t do it for you. I was pleasantly surprised to find that the internal speakers are good enough for normal use.

Pros

  • Decent Speakers for a Monitor
  • Vast Array of Connectivity Options
  • Integrated USB Hub

Cons

  • Audio ports only function with VGA

Gaming and Entertainment Performance

4k monitors have the same effect on games that they do on videos and images, which means you will get a lot of benefit from using them while gaming. That said, finding a monitor that big with a 4k resolution and the right specs for gaming is going to be extremely expensive. 

The size of your monitor will have an effect on what you can see while playing your game of choice. With an increase in size, you can also comfortably increase the field of view for your game in the case of a first-person view or you will be able to see more of the environment around you in the case of a top-down view like for most MOBAs.

HDR media Support

The concept of High Dynamic Range (HDR) is fairly new concerning gaming and television but is commonly discussed among photographers regarding cameras. Essentially, it is a name for the process of ensuring that the clarity of an image is as close to the same as what you get from looking at things through your own eyes as possible.

This process often involves a special focus on darkness, light, and how the two interact with each other when they meet and how the two affect colors. HDR is another factor that benefits image quality and clarity.

Changes in the Viewing Distance

The bigger a monitor is the larger the optimal viewing angle for it will be. If a monitor is particularly large then you can see it without experiencing a drop in visual clarity from farther distances which can be especially useful if, like me, you tend to lean far back in your chair at your desk.

Past a certain point, you will notice a significant drop in visual quality for any monitor, but this is extended and the drop is mitigated by the size of your screen. You can also mitigate it slightly by having a higher resolution monitor, so a 40 inch 4k monitor would be viewable from a distance of several feet without much loss.

Connectivity Options to Look For

Not all connectivity ports are created equal. Some have a hard time reaching higher refresh rates and resolutions, like HDMI. The optimal port to use for a monitor of this type is DisplayPort. It is important that you inspect a DisplayPort cable before you use it because it is relatively new as far as connectivity options go and sometimes generic cables that have not been certified are shipped instead of true DisplayPort cables.

Most 4k monitors won’t support HDMI at all, but if they do you are still better off sticking with a different option for connecting your monitor to your devices. This is because earlier versions of HDMI will lock your refresh rate at 30 Hz and newer ones will still not reach the highest refresh rates that better monitors can support.

Any Downsides of Large Monitors?

There are some downsides to using larger monitors, one of which is that the closer you sit to one the more you will have to turn your head to see all parts of it. Ideally, you should be able to see the entire screen without having to move your head at all.

There is the added downside of larger monitors filling more space on your desk, which means you will have less room for peripherals like speakers as well as your input devices like the keyboard and mouse. It is also heavier which means you might have a harder time mounting your monitor on the wall or a VESA multi-monitor stand.

The best 40 inch 4k monitor brands take these downsides into account during the design process.

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Branton

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Hey there! I'm Branton, the founder and lead editor here at PC Game Haven. Since our launch in 2015, we've helped thousands upon thousands of gamers build their dream desktops, find the perfect peripherals, and more. Thanks for stopping by and feel free to get in tough!

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