The LG 34GK950F-B is a very good monitor overall, and it delivers a great gaming experience. It has an excellent response time and an optional black frame insertion feature that can further improve motion clarity. This monitor supports AMD's FreeSync variable refresh rate technology, even when connected to a recent NVIDIA graphics card, and it has outstanding low input lag. It delivers decent picture quality, with very good peak brightness in SDR and great reflection handling. This monitor supports HDR, but it's not bright enough for a great HDR movie experience. Unfortunately, like most IPS monitors, it doesn't look as good in a dark room.
This is a good monitor for most uses. It's a great choice for office use, especially in a brighter environment, and it has excellent screen real estate. It's a great gaming monitor as well, with a fast response time, low input lag, and FreeSync support. Unfortunately, it isn't great for gaming or watching videos in a dark room.See our Mixed Usage recommendations
Good monitor for office use. It has an excellent amount of screen real estate, great for multitasking. It has very good peak brightness, great reflection handling, and wide viewing angles. It has limited ergonomics, with a good tilt and height adjustment, but it has a very narrow swivel range, and it can't rotate to portrait orientation.See our Office recommendations
This is a great gaming monitor overall. It has a great response time, excellent low input lag, and a fast refresh rate, and it supports FreeSync variable refresh rate technology. Unfortunately, it has limited ergonomics, and it doesn't look as good in a dark room.See our Gaming recommendations
The LG 34GK950F is a good monitor for multimedia. The large, high-resolution screen is great for watching videos, and it has good viewing angles, perfect for sharing the latest trends with a few friends. It has excellent gray uniformity, very good peak brightness, and great reflection handling.See our Multimedia recommendations
The LG 34GK950F-B is a very good monitor for media creation. It has an excellent amount of screen real estate, so you can see more of your project at once. It also has good viewing angles, perfect for sharing your screen with your clients or coworkers.See our Media Creation recommendations
Decent monitor for HDR gaming. It's limited by the disappointing contrast and bad black uniformity, and it doesn't have a local dimming feature. Other than that, it has great gaming performance, with an excellent response time and FreeSync support. It also has excellent low input lag.See our HDR Gaming recommendations
The stand supports the LG 34GK950F-B fairly well but doesn't completely eliminate wobble. It's wide but narrow, so it doesn't prevent you from placing objects in front of the display.
The stand has a decent height adjustment and adequate tilt range, but it has a bad swivel range. Due to the wide format, curved screen, it can't rotate to portrait orientation.
Like other UltraGear monitors from LG, there is a red ring on the back of the monitor, but it doesn't have RGB lighting. There is a quick-release on the stand, which is a nice touch, and it can be VESA-mounted if you don't want to use the included stand. There is only basic cable management through a clip on the back of the stand.
The borders on the LG 34GK950F-B are thin on all four sides, and they aren't very distracting.
Due to the curvature of the screen, the LG 34GK950F-B is a bit thicker than most, even when VESA-mounted.
Decent build quality overall. The external panels of the monitor are almost entirely made of plastic, but we didn't notice any potential weak spots or areas of concern.
Most IPS monitors have disappointing native contrast, and the 34GK950F is no exception. This isn't great for gaming in a dark room, especially with dark scenes, as blacks tend to appear gray.
Unfortunately, the LG 34GK950F does not have a local dimming feature. The above video is provided for reference only.
Very good peak brightness, very similar to the 32GK650F-B. There is no noticeable variation in peak brightness with different content, which is great.
Decent peak brightness in HDR on the LG 34GK950F-B. There is almost no variation in peak brightness with different content, which is much better than the LG 34WK95U-W. This monitor is bright enough to deliver a decent HDR gaming experience, but it isn't bright enough for HDR movies.
Like most IPS monitors, the LG 34GK950F has good horizontal viewing angles. The black levels remain relatively constant, and the brightness drop is very gradual, so the image doesn't appear washed out until a very wide angle. Colors also remain accurate to a moderate angle but lose accuracy before the brightness decreases.
This monitor has a good vertical viewing angle. Colors lose accuracy at a minor angle, but the brightness doesn't decrease as quickly, and the black levels remain relatively flat.
Overall, this monitor has excellent gray uniformity. It isn't perfect, though, and the sides of the screen are a bit darker than the rest. In the center of the screen, though, the overall uniformity is great, and in near-dark scenes, it's excellent.
Like most IPS monitors, this display has bad black uniformity. There is noticeable backlight bleed, which may be distracting in dark scenes in a dark room. There is worse bleed from the corners of the display, but due to the curvature of the monitor, the image is partially cropped, so it looks worse in person than the image suggests.
With the most accurate out-of-the-box settings, this monitor has good accuracy. The sRGB picture mode is the most accurate, but unfortunately, the only setting you can adjust in this mode is the brightness, so most people will want to use something else.
In this mode, gamma follows the sRGB target curve well for brighter scenes, but dark scenes are over-darkened significantly. Colors have great accuracy though, and most people won't notice any issues.
After calibration, this monitor has excellent accuracy. Almost all inaccuracies are corrected, except for pure blue, which is still slightly inaccurate. Gamma almost follows the target curve perfectly, and the color temperature is very close to the calibration target of 6500K.
You can download our ICC profile calibration here. This is provided for reference only and should not be used, as the calibration values vary per individual unit even for the same model due to manufacturing tolerances.
s.RGB Picture Mode: Gamer 2 (calibrated)Adobe RGB Picture Mode: Gamer 2
Excellent SDR color gamut. The LG 34GK950F can display the entire sRGB color space, and has excellent coverage of the wider Adobe RGB color space, great for professional photo editing.
s.RGB Picture Mode: Gamer 2 Adobe RGB Picture Mode: Gamer 2
Outstanding SDR color volume. It can't display dark, saturated colors very well due to the limited contrast, and it can't display very bright blues, but this is normal for most LED displays.
DCI P3 Picture Mode: Gamer 2 Rec. 2020 Picture Mode: Gamer 2
Good HDR color gamut. It has excellent coverage of the DCI P3 used by most current games and movies, but only decent coverage of the wider Rec. 2020 color space.
DCI P3 Picture Mode: Gamer 2 Rec. 2020 Picture Mode: Gamer 2
Overall, the LG 34GK950F has mediocre color volume. It's limited by the HDR color gamut, and it can't display dark, saturated colors very well due to the limited contrast. Pure white is much brighter than colors in HDR.
The LG 34GK950F-B has no signs of temporary image retention, even immediately after displaying our high-contrast static test image for 10 minutes.
This monitor has outstanding gradient performance. There is almost no noticeable banding in any shade.
There is some very slight color bleed, but this shouldn't be noticeable with most content.
The LG 34GK950F-B has great reflection handling, making it an excellent choice in a brighter room.
|Mode||Response Time Chart||Motion Blur Photo|
The LG 34GK950F has an excellent response time. From the adjustable overdrive settings, we recommend the 'Fast' mode, as it delivers clear motion with a very short blur trail, no noticeable overshoot, and only a bit of undershoot in some transitions. 'Faster' delivers a slightly faster response time, but there is significant overshoot in some transitions, especially in dark scenes.
The backlight is completely flicker-free at all brightness levels. There is an optional black-frame insertion feature, which can flicker at either 120Hz or 144Hz, to match the refresh rate. This feature is only supported over DisplayPort, though.
The LG 34GK950F has an excellent refresh rate over DisplayPort. Over HDMI, it's limited to an 85Hz refresh rate, which is decent, but in this mode, it's limited to 8-bit color. It can display 10-bit color over HDMI, but only at 60Hz. It supports FreeSync variable refresh rate technology over both HDMI and DisplayPort, but due to the limited refresh rate over HDMI, the VRR range is limited over HDMI. Over DisplayPort, the VRR range is outstanding, delivering a nearly tear-free gaming experience, even in extremely demanding scenes.
Update: 08/14/2019: We've retested the input lag after updating the monitor to the latest firmware. The scores and text have been updated.
The LG 34GK950F-B has outstanding low input lag. The input lag remains low even with FreeSync or HDR enabled. With the optional black frame insertion feature enabled, the input lag is slightly higher, but still great. The 60Hz input lag is quite a bit higher, which isn't great for console gaming.
When you first receive this monitor, it is very important to update the firmware, as the factory firmware has very high input lag. To update the firmware, the monitor has to be connected to your computer with the included USB adapter, and LG's OnScreen Control software must be installed. When you open the software with the monitor connected, it should automatically detect that a new firmware is available. If it doesn't, your monitor might already have the newest version.
The large, high-resolution screen on the 34GK950F is great for multitasking, as it has an excellent amount of screen real estate.
This monitor has a good selection of inputs, including 2 HDMI ports, and a 2 port USB 3.0 Hub.
There is an analog audio out port, and the volume can be controlled through the monitor's OSD.
There are very few additional features on this display. Like many gaming monitors there is an option to add virtual crosshairs to your favorite games. There is a Black Stabilizer feature, which adjusts the gamma of dark scenes to make it easier to see objects in shadows.
Like most LG monitors, the controls consist of a single joystick nub located under the monitor, in the center. This control works well, and the UI is easy to navigate.
We tested the 34" 34GK950F-B, which is the only size available. The 34GK950 is also available with G-SYNC instead of FreeSync. That model is known as the 34GK950G-B, and we don't expect it to perform the same, as it's limited to a 120Hz refresh rate. There are other models in LG's UltraGear lineup, some of which are listed in the table below.
If someone comes across a different type of panel or if their 34GK950F doesn't correspond to our review, let us know and we will update the review. Note that some tests such as the gray uniformity may vary between individual units.
The 34GK950F we reviewed was manufactured in April 2019.
The LG 34GK950F-B is a bit better than the Dell Alienware AW3418DW for most uses. The 34GK950F supports HDR, and it has an optional black frame insertion feature for clearer motion. The LG supports FreeSync variable refresh rate technology and has a faster refresh rate. The AW3418DW, on the other hand, has native G-SYNC support, great if you want to get the most from your NVIDIA graphics card.
The LG 34GK950F-B is better than the ASUS ROG Swift PG348Q for most uses, but some people might prefer the ASUS for gaming. The LG supports HDR, has an optional black frame insertion feature, and has a higher refresh rate. The biggest difference for gamers is that the LG supports AMD's FreeSync variable refresh rate technology, whereas the ASUS supports NVIDIA's G-SYNC technology.
The LG 34GK950F-B and the LG 32GK650F-B use different panel technologies, each with their own advantages and disadvantages. The 34" model uses an IPS panel, with much wider viewing angles, and it has a wide format aspect ratio, which some people prefer. The 32" model has a VA panel, which looks better in a dark room.