When comparing ASUS PB279Q vs LG 25UM57, the Slant community recommends LG 25UM57 for most people. In the question“What are the best monitors?” LG 25UM57 is ranked 6th while ASUS PB279Q is ranked 31st. The most important reason people chose LG 25UM57 is:
The fact that a monitor of this price range has a 5M:1 contrast ratio is simply astonishing. This means users get cinema-like picture quality right at their desk.
Specs
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Pros
Pro Thin bezels
The top and side bezels are about 13mm thin with the bottom bezel being slightly thicker at 18mm.
Pro Reasonably good luminance uniformity
The screen also has good luminance uniformity, providing a evenly lit picture. At the dimmest point, the deviation is 12% from the brightest point (141.4 cd/m² to 160.4 cd/m²).
Pro Low input lag
Complete input lag time (signal delay and pixel response time) is 7.4ms or under ½ of a frame.
Pro Easily adjustable
The monitor tilts (5° forward, 20° backward), swivels (60° to both the left and right), pivots (90° clockwise, allowing it to be used in portrait mode) and allows adjusting height between 43mm (1.69") to 410mm (16.14").
Pro Good contrast and brightness
According to tests performed by PC Monitors, PB279Q set to factory defaults (90% brightness, "Splendid" preset) produces luminance in the range of 0.24 - 282 cd/m² with a contrast of 1175. It provides both lots of brightness and reasonably dark blacks.
Pro Good color accuracy
The monitor covers all of sRGB space and represents the colors accurately.
Pro Cinema-like picture quality for an affordable price
The fact that a monitor of this price range has a 5M:1 contrast ratio is simply astonishing. This means users get cinema-like picture quality right at their desk.
Pro Good sound quality with no need for external speakers
This monitor's speakers are as good as those found on small TVs. They're located in the back and come with an audio jack for headphone connectivity.
Pro Immersive
The 2560x1080 resolution creates an immersive setup. This applies even for work tasks: multiple documents can be displayed side-by-side with no legibility sacrifice. It's equivalent to having two monitors with 1280x1080 screens.
Pro Advantageous for all uses
This monitor's ultrawide screen has advantages for all uses. When it comes to movie watching or gaming, the screen size contributes to a truly engaging experience. As far as general productivity goes, the ultrawide screen makes it easy to have different applications or documents open side by side.
Pro Great for watching movies
The 21:9 aspect ratio comes in handy when watching movies. This is the default aspect ratio at which almost all of the films are shot. Hence, you can watch your movies without having two black bars at the top and bottom of the screen.
Cons
Con A maximum refresh rate of 60Hz can be a concern for some
A 60Hz monitor, while sufficient for most people in most cases, can still cause issues with fast-moving objects on screen. It's especially important with things like gaming where the ability to react to events happening on the screen quickly is important.
Con Minor color temperature uniformity issues
According to Spyder4Elite tests performed by PC Monitor, PB279Q has color temperature issues that can be seen with the naked eye. A DeltaE deviation of over 3 can be easily noticed and the left side of the monitor deviates between 2.4 and 3.1.
Con AHVA glow
AHVA glow is the light on the sides or corners of the screen that can reduce some of the peripheral detail.
Con HDMI connections are limited to 30Hz
DisplayPort 1.2 (or MiniDP 1.2) is needed to run at 60Hz.
Con Limited connectivity
This monitor has two HMDI ports, which is pretty good. However, it misses other display inputs such as DVI or Display Port, making incompatible with older computers.
Con Lack of support for ultra-widescreen in (old) games
A handful of games do not support 21:9 aspect ratio by default. Some examples are Overwatch, Fallout 3, and Starcraft 2. If this is important for you, it is recommended you test this issue before getting this monitor. But there are solutions: you can either install fixes (only available for some games) or play in windowed mode, using a different aspect ratio.
Con Slow response time
A response time of 5 ms on a gaming monitor is pretty awful. Considering its refresh rate, it is understandable but not acceptable. Note that this response time is from gray-to-gray.
Con 720p and 1080p videos are sandwhiched
This monitor's aspect ratio means that many online videos, such as those from Netflix or YouTube, will have black spaces on the sides, which can be annoying.
