This year there is an update to the UltraGear LG gaming monitor display. With the 27GP850, the slimmed-down version of the 27GP950, the leader in the current portfolio, reaches us. The shorter version doesn’t have to be worse. While the top model relies on UHD and DisplayHDR 600, our LG 27GP850-B review unit focused on ultra-fast gameplay, which can be better achieved with lower resolutions even with weaker hardware.
The LG 27GP850 PC gaming monitor features a 27-inch Nano IPS panel with a WQHD resolution of (2560 x 1440 pixels). The lightning-fast display is announced with a response time of 1 ms (GTG) and can be overclocked up to 180 Hz from the native 165 Hz. With VESA DisplayHDR 400, there is no true HDR experience, but 98% of the DCI-P3 color space should be covered, and there are bright colors possible. AMD FreeSync Premium technology is used to eliminate bursts and stutter, which certainly doesn’t exclude NVIDIA cards. Even the G-Sync Compatible certification has been achieved.
So you can find out in this LG 27GP850-B review whether this LG gaming pc monitor can catch up with other gaming displays from the UltraGear line of laurels in terms of performance.
The outer skin of the LG 27GP850 is made entirely of black plastic with red highlights. The feel of the silky surface can be described as high quality, but it is also susceptible to fingerprints. If a cleaning cloth with a mild plastic cleaner is not used regularly, the large area on the back can look unsightly quickly.
The display features a frameless design on three sides so that the panel is framed by a narrow band at the top and sides. The bottom frame is about 18mm thick. The LG logo is printed in a light gray color in the middle, while a bright green G-Sync badge is placed on the right side, but can be easily removed.
The LG 27GP850’s control unit can be accessed under the monitor. It has a 5-way joystick without any buttons. On the right, small clamps, including the mouse cable, can be clicked under the frame to reduce the pre-tensioning of the cable.
A small clamp can be mounted on the bottom right of the monitor, which acts as a holding device for the mouse cable. The depth of the display is about 20 mm. Thanks to a rounded housing that’s offset slightly, the rear panel gets a further 30mm in depth and houses the LG 27GP850’s electronics. Several small holes on the outside of the case are used for ventilation.
The UltraGear logo is embossed on the inside of the circle. The connection panel is located to the right of the VESA 100 device/monitor mounting plate. To move the display from landscape to portrait position, the pivot mode hinge is placed directly behind the mounting plate.
Tilt can be adjusted in the range of 5 degrees forward and 15 degrees backward. The mounting plate moves inside the monitor arm on a slide system and can be adjusted in height to a distance of 110 mm. In the lowest position, the lower frame is 110 mm from the table surface.
The LG 27GP850 does not allow the display to be rotated side to side. The spacious, downward-facing conical support arm is a kind of clamp-on, which due to its position must be used for cable management.
At the bottom, the support arm attaches to the base, which consists of two brackets at a large angle to ensure that the monitor is firmly erected. This also works very well, as the LG 27GP850 doesn’t lose its balance even with the rough nudge. The small rubber feet also prevent slipping on the ground.
In terms of design, the LG 27GP850 is pretty minimalist. Red accents are used sparingly and skillfully. Only the bright green G-Sync sticker bothers something in the picture, but it can be easily removed. With this model, you will have to do without a lighting concept located on the round housing at the back of this series, but this does not bother us. The workmanship is of a high standard, and the panel fits neatly into the narrow outer band. The moving parts also move smoothly and cleanly.
We couldn’t hear any disturbing noises such as humming or high-frequency whistles, even in special test images with harsh contrast. However, noise development may be subject to a certain series spread, which is why this estimation does not need to be applied equally to all devices in a series.
The manufacturer specifies a maximum consumption of 65 watts. We measure a requirement of 46.8 watts at 100% luminance. At 140 cd/m², 22.1 watts are required, which corresponds to a good efficiency of 1.27 cd/W.
The power supply unit is usually constructed somewhat differently than is known from the monitor, as the plug is connected directly. So you are a little more limited in the choice of the socket, as it is about 6 cm.
An easily accessible connection panel with horizontal cable routing is located to the right of the support arm’s monitor mounting plate, in the center of the back wall. It is an alternatively less attractive solution, but it is more user-friendly. A DisplayPort 1.4 and two HDMI 2.0 interfaces are used as signal inputs, which is sufficient. In addition, two USB 3.0 downstream ports are available for connecting peripheral devices. The top one has a quick charge function. Headphones can be connected using the 3.5mm jack socket.
5-way joystick controls
The OSD menu is operated only via a 5-way joystick, which is located in the middle under the display. By default, the operation LED does not light up but can be activated through the menu. The LED then turns red during operation and flashes in standby.
The joystick responds very well, and its actuation with a quiet click gives feedback. There are two hotkeys. When moving sideways, you can control the volume of the headphone jack, and when moving vertically, the brightness is controlled. If the joystick is pressed in the center, the main menu appears.
The commands “Switch off”, “Settings” and “Exit” are permanently assigned. The left command “Input” and the right command “Game mode”, on the other hand, can be assigned differently in the settings.
When we reset our LG 27GP850-B review unit, the monitor sets the following values: brightness 40, contrast 70, game mode “Player 1”, gamma “mode 2”, and color temperature “user”.
Under illumination, shades of gray are displayed in full until the last field, but the shadow is too dark. Here the dark gray tones stand out from the dark black background only from the sixth area. A color cast cannot be seen. If you veer off the center, the lighter gray tones take on a blue cast. Nothing changes in terms of identity.
When viewed from the front, the gray gradient shows a general light-colored ladder in the area where pure white meets light gray. It gets more accent when viewed from the side. Otherwise, the gray gradient appears homogeneous.
The picture on the left shows a completely black image, as you would see it with the naked eye; This is where noticeable weaknesses appear. On the other hand, the picture on the right with longer exposure times highlights problem areas and is only used for a clear representation.
As such, the LG 27GP850 has a nice black screen. At the bottom edge of the picture, you can see two spots where the background light shines through. However, they are only faintly visible in complete darkness and are noticeable, if at all, during normal operation. When the exposure time is five times longer, the spots are certainly much more visible, but only a small amount of cloudiness is formed.
Brightness depends on the height from which you look at the display and appears in purple. However, the strength is pleasantly low.
The measurements are carried out after calibration to D65 as the white point. If possible, all dynamic controls are deactivated. Due to the necessary adjustments, the results are lower than when the test series was carried out with the native white point.
The measurement window is not surrounded by a black border. The values can therefore be compared with the ANSI contrast and reflect real-world situations much better than measurements of flat white and black images.
According to the specs, the LG 27GP850 has a maximum brightness of 400 cd/m². We measured slightly more with 409 cd/m². To reach the D65, you don’t need to do a lot of work on the RGB controls to maintain a brightness of 396 cd/m² even after adjustments. With only 24 cd/m² working in complete darkness is no problem.
LG states that the 27GP850-B has a maximum contrast ratio of 1000: 1. But our LG 27GP850-B review unit test cannot convince here and barely manages to handicap a good result with an average contrast value of 772:1. After calibration, an almost identical result is obtained with 776:1.
Microscopic view of the subpixels, with a focus on the screen surface: The LG 27GP850 has a matt crystalline surface with subtle microscopic depressions for diffusion. Colors look somewhat brighter, but unpleasant reflections can quickly occur in a sun-drenched room, especially when the image content is dark.
The photo shows the screen of the LG 27GP850 at a horizontal viewing angle of ± 75 degrees and vertical angles of +60 and -45 degrees.
The viewing angle stability of the LG 27GP850 is good, as there is only a slight loss of contrast that can be criticized. Bright colors also remain stable at all viewing angles. However, the color is cast in light brown tones. When viewed from the side, they have a bluish cast and when viewed vertically, they have a brown cast.
In the case of monitors for the consumer and office sector, we first test the color reproduction in the factory settings after the reset and – if available – in an sRGB mode. The monitor is then calibrated with Quato iColor Display. We use the X-Rite i1Display Pro colorimeter, and the X-Rite i1Pro spectrophotometer is used as a measuring device.
When examining the color space, we first determine the coverage of the sRGB color space. Here the display achieves coverage of 99% before the calibration and 100% after the calibration, which corresponds to a very good assessment.
Measurements before calibration and profiling
Game mode: Player1 (factory setting)
After the reset in the OSD, the following values are preset: picture mode “Player 1”, gamma “Mode 2”, color temperature “User”, brightness 40, and contrast 70.
In the factory settings, the LG 27GP850 shows a satisfactory performance for the gray colors with an average Delta C of 1.44 and a range of 2.05. The color temperature of 6526 K is in an ideal range. The gamma curve is not linear, but the average gamma of 2.20 is hit optimally.
Comparison of “sRGB mode” with sRGB working color space
There is also an sRGB mode under the “Game Mode” category. With an average Delta C of 0.33 and a range of 0.98, the gray values are in a very good range. However, the bright colors cannot quite hold the result and come off well with an average Delta E94 of 1.82. The color temperature is too warm at 5680 K, and the average gamma is too low at 2.03. Overall, however, this is a decent result for an uncalibrated display.
Measurements after calibration and profiling
For the following measurements, the LG 27GP850 was calibrated from Quato iColor Display (picture mode “Player 1”, gamma “Mode 2”, color temperature “User”) and profiled. The desired brightness was 140 cd/m². D65 was chosen as the white point.
Neither is a generally valid recommendation. It also applies to the choice of gradation, especially since the current characteristics are taken into account in terms of color management.
The LG 27GP850 shows no noticeable drifts or unsightly non-linearities. The matrix profile describes its condition very precisely. A repetition of the professional validation after 24 hours did not result in any significantly increased deviations. All calibration goals were achieved. The gray values do well, bright colors even do very well.
Comparison with sRGB (color transformed)
Our CMM takes working color space and screen profile into account and, on this basis, carries out the necessary color space transformations with colorimetric rendering intent. The LG 27GP850 has achieved a good result with an average Delta C of 0.35, a range of 1.37, and a Delta E94 of 0.25. If the range had been a little lower, it would have been enough to achieve an overall good result, because the gamma curve also follows the ideal line almost completely. Still, that’s a great result for a gaming display.
Response times, we set for black-white change and best gray-to-gray change. The measured value goes beyond the traditional measurement of a net jump in CTC (color to color) brightness – after all, you usually see a color image on a screen. Therefore, this measurement measures the longest period that the monitor needs to switch from one mixed color to another and stabilizes its brightness. Mixed colors cyan, magenta, and yellow are used – each with 50% signal brightness. With CTC color change, all three sub-pixels of a pixel do not switch equally but have different rise and decay times combined.
A response time of 1 ms (GtG) is specified in the specs. An acceleration option (reaction time) is available and can be found under “Game settings -> Reaction time”. There are the positions “Off”, “Normal”, “Fast” and “Faster”. “Fast” is preset as the standard value. The frame rate at native resolution reaches a maximum of 165 Hz and can be overclocked to 180 Hz under “Game Settings -> Overclock”.
At factory settings at 165 Hz, the LG 27GP850 lags slightly behind other gaming displays and finishes in midfield on average, but with 5.2 ms for black and white change, 3 ms for gray change, with 4.9 ms as the average value. At 15 measuring points and 4 ms for the CtC value, the test person does not need to hide in terms of performance.
Latency is an important value for gamers, we determine it as the sum of half of the signal delay time and the average frame change time. A very short signal delay of 1 ms and an average picture change time of 1.8 ms add up to a total latency of 2.8 ms. That makes the LG 27GP850 a perfect display device, especially for fast shooters.
The background light of the monitor is not reduced by pulse width modulation (PWM), so there are no interruptions in the luminous flux (flickering). Thus, the monitor is suitable for longer sessions even with reduced brightness.
60Hz on a game console
The LG 27GP850 is certainly a good choice for a game console that neither has FreeSync nor update rates above 60Hz. The rapid change in direction produces less blur than many other monitors. Here, however, you should use the “Fast” acceleration option set at the factory. If the response time “Fast” is selected, the following image below shows massive picture errors.
Of course, the LG 27GP850 has been optimized for PC operation and can benefit from a native update rate of 165 Hz. In addition to the naturally very smooth gameplay that comes about with such a high frame rate, the motion blur changes a lot for the better. It is particularly evident when cornering or with shooters, especially when the image is moved quickly in a horizontal direction.
Despite the acceleration, objects are displayed very sharp, and there is only a slight blur. You can also opt for the “Faster” acceleration option if you want to get the ultimate performance out of the LG 27GP850. Only small differences in image quality have to be accepted here, which are noticeable in the form of a slight afterglow on fast-moving objects. However, we could neither visually nor subliminally notice an advantage that outweighs this difference in image quality.
The LG 27GP850 has been officially certified as a DisplayHDR-400 device. As already known, this is the lower limit of HDR certification. A real wow factor cannot be expected here, and it is not offered at the end.
The LG 27GP850 has no speakers, but it has two HDMI 2.0 interfaces to which HD players such as BD players, game consoles, or HD receivers can be connected. If the headphone output is occupied, the sound is forwarded directly to it.
The aspect ratio is set to “full screen” at the factory. The material in FHD and HD ready is consequently displayed on full screen. SD material is scaled to the full height of the screen and has the usual black bars on the sides.
The manual does not provide any information as to whether interlaced signals are accepted. To test this, we connected the monitor to an HDTV receiver and fed it material in 1080i. The result is quite impressive, and there is also no shaky picture.
The LG 27GP850 comes in a simple minimalist front design and attractive round case with red accents on the back wall. Show lighting has to be done away with this monitor, as it is only used in the 900 series. With this LG 27GP850-B review, one can only report positive things in terms of workmanship and mechanics. In terms of ergonomics, everything is offered, except for the swivel mode, which we all missed on the UltraGear display.
The LG 27GP850 is worth a look for amateur photographers who use the sRGB color space. sRGB emulation provides a good basis for this and can also be adjusted in terms of brightness, which is rarely found. After calibration, the monitor barely missed a very good result. The brightness distribution is in a satisfactory range, while the color purity again yields very good results.
For a successful movie evening, it depends on the feed. The IPS panel can score with good viewing angle stability, but older BD players that only managed HD signals were excluded from the 24 Hz mode. The device only allows 1440 Hz at 24p. Also, the signal is not transmitted properly over HDMI, and you have to live with a dull picture. However, these problems do not play on the computer, which is why the PC can be used as a playback device for such evenings.
As an UltraGear display, the LG 27GP850 is advertised as a PC gaming monitor. A response time of 1 ms has not been achieved, but with a high update rate of 165 Hz, the device achieves switching times that are so good that it meets even the highest demands. Plus, you already get an image with very little motion blur. If that’s not enough for you, you can eventually switch to “motion blur reduction”, which was not part of the toolbox in previous models. A high refresh rate is also possible up to 165 Hz, and with a record-breaking total latency of just 2.8 ms, friends of fast shooters will be happy. The LG 27GP850 is likely to be able to overclock to 180 Hz but serves more as an advertising message as very few will be able to notice the 15 Hz difference in such areas.
At the current online price of around $496.99 on Amazon.com, Bhphotovideo.com, and Amazon.co.uk. the LG 27GP850-B is almost average compared to other displays with similar features. Judging by the performance offered, which can be considered from good to very good overall, by reading this LG 27GP850-B review, you will get the recommendation to buy this monitor.