LG 27UK850 Review: 4K IPS HDR FreeSync Monitor With USB-C


Looking for a 4K monitor with USB-C for your laptop?

Want FreeSync and HDR for PC/console gaming as well?

Well, the LG 27UK850 offers all that for a reasonable price!

Image Quality

The LG 27UK850-W monitor is based on an IPS panel which ensures accurate, consistent, and vibrant colors makes this display adequate for professional photo-editing tasks.

It supports 10-bit color depth (8-bit + 2-bit FRC) and it’s factory-calibrated for over 99% of the sRGB color gamut coverage.

The 4K UHD resolution ensures stunning detail clarity with over 8 million pixels which on the 27″ screen of the LG 27UK850 display result in a high pixel density of 163 pixels per inch.

Such high pixel density will make everything look tiny, so you will have to scale up your interface which will, in turn, make everything bigger, crispier and more detailed.

Further, the peak brightness of 350-nits gets a small but noticeable boost to 450-nits when watching HDR-compatible content.

However, the LG 27UK850 lacks proper color gamut and contrast ratio for a top-level HDR (High Dynamic Range) viewing experience.

Without at least 90% of the DCI-P3 color gamut, a monitor doesn’t qualify for the entry-level HDR certification by VESA.

Nonetheless, some HDR content actually does look better and more vibrant on the LG 27UK850, but it’s not nearly as good as on certain more capable HDR monitors.


There is minimal backlight bleeding and IPS glow present on the LG 27UK850 4K monitor while the input lag performance is top-notch amounting to around 10ms.

Overall, the monitor’s performance is without issues. The wide 178° viewing angles will ensure that the picture looks amazing no matter the angle you’re looking at the screen.

In addition, the LG 27UK850 is flicker-free and has an integrated filter against the harmful low-blue lights.

When it comes to gaming, set the ‘Response Time’ setting in the OSD (On-Screen Display) menu to ‘Faster’ in order to get the advertised 5ms response time speed.

There’s no prominent ghosting or motion blur visible even in fast-paced video games though a 60Hz refresh rate will feel very sluggish if you’re used to higher refresh rate displays; however, if you prefer better graphics over performance, 4K more than makes up for it.


lg 27uk850-w amazon

Moving on, the LG 27UK850 HDR monitor offers plenty of additional features.

You will find all the common features found on LG monitors such as On-Screen Control (to adjust OSD settings in a desktop app), Screen Split (to divide the screen into different layouts for multitasking), and advanced picture adjustments such as 6-axis, gamma, etc.

Other gaming features include Black Stabilizer which alters the gamma curve for more visible details in dark parts of the image, Dynamic Action Sync which further reduces input lag, and pre-calibrated picture presets for FPS and RTS game genres.

Using the HDR Effect feature, you can simulate HDR for non-HDR content. Additionally, there are four different HDR modes: HDR Vivid, HDR Standard, HDR Game, and HDR Cinema.

Finally, the LG 27UK850 supports AMD FreeSync which provides a variable refresh rate if you connect the monitor to a compatible AMD graphic card or an Xbox One console.

FreeSync removes all screen tearing and stuttering with minimal input lag penalty for a smoother gameplay experience.

The LG 27UK850 FreeSync range is 40-60Hz/FPS (Frames Per Second). So, as long as your FPS rate stays within that range, you’ll experience no screen tears nor stutters.

Design & Connectivity

lg 27uk850-w review 2019

The design of the monitor is modern yet simple with thin bezels, so it will fit in any environment.

Moreover, it offers versatile ergonomics include up to 110mm height adjustment, -5°/20° tilt, 90° pivot, and 100 x 100mm VESA mount compatibility, but you cannot swivel the screen to the left or right.

The LG 27UK850 27-inch monitor has rich connectivity options including two HDMI ports, a DisplayPort, a USB-C port, a dual USB 3.0 hub, a headphones jack, and two 5W MaxxAudio built-in speakers.

The USB-C port supports DisplayPort Alternate Mode and power delivery up to 60W. So, you can transfer 4K content, audio, data, and power simultaneously with just one cable.

Note that when the USB-C port is used for other purposes than as the upstream port, the USB hub is limited to the USB 2.0 bandwidth.

All display ports also support HDCP 2.2, so you can stream content from Netflix, Amazon Video, etc in 4K UHD. FreeSync works over both HDMI and DisplayPort with a 40-60Hz dynamic range.

Price & Similar Monitors

The LG 27UK850 price is $549.99 MSRP which given its plethora of features, performance, and image quality is fairly reasonable.

If you’re looking for a similar monitor, but don’t need USB-C, check out the LG 27UK650 which is a more affordable 4K HDR model.


All in all, the LG 27UK850 IPS monitor is perfect for anyone who wants a 4K display with HDR, FreeSync, and USB-C.

It’s got a great design, rich connectivity, and plenty of additional features both for gaming and everyday use. All that for a fair price.

LG 27UK850 Specifications

Screen Size27-inch
Resolution3840×2160 (UHD)
Panel TypeIPS
Aspect Ratio16:9 (Widescreen)
Refresh Rate60Hz
Response Time5ms (GtG)
Adaptive SyncFreeSync (40Hz-60Hz)
PortsDisplayPort 1.2, 2x HDMI 2.0
Other Ports2x USB 3.0, USB-C, Headphones Jack
Brightness350 cd/m2
Brightness (HDR)450 cd/m2
Contrast Ratio1000:1 (static)
Colors1.07 billion (8-bit + FRC)
VESAYes (100x100mm)
High Dynamic RangeHDR10

What We Loved

  • Impeccable USB-C connectivity with PD
  • Plenty of features including AMD FreeSync over HDMI
  • HDR10 support
  • Ergonomic design and rich connectivity options
  • Accurate and vibrant colors

What We Didn’t Like

  • Design lacks swivel option
  • No DCI-P3 color gamut for HDR
LG 27UK850 Review
  • 9.5/10
    Design - 9.5/10
  • 9.2/10
    Display - 9.2/10
  • 8.9/10
    Performance - 8.9/10
  • 9/10
    Price/Value - 9/10


The LG 27UK850 offers a great and balanced all-around performance for gaming, photo-editing, and everyday use thanks to its many useful features, stunning image quality, and smooth performance.

Related Reads