When comparing LG 27MD5KA-B vs LG 34UC99-W, the Slant community recommends LG 34UC99-W for most people. In the question“What are the best monitors?” LG 34UC99-W is ranked 91st while LG 27MD5KA-B is ranked 196th. The most important reason people chose LG 34UC99-W is:
You can work with multiple windows at once thanks to a large amount of on-screen space the LG 34UC99-W offers. Its massive 34-inch 3440x1440 panel comes with a variety of split-screen presets that can fit multiple tabs.
Specs
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Pros
Pro Sharp pictures
On this monitor, the pictures appear incredibly sharp thanks to the enormously high pixel density of the LG 27MD5KA-B. The monitor's pixel density measures at 217.57 pixels per inch which corresponds even to the high standards of the Apple's Retina displays.
Pro Can power laptop
The LG 27MD5KA-B does have enough juice to power a laptop through its Thunderbolt3 compatible USB-C port. Through a single cable, the monitor can receive a video signal from a 2018's MacBook Pro, power it, and work as a USB hub.
Pro Good for multitasking
You can work with multiple windows at once thanks to a large amount of on-screen space the LG 34UC99-W offers. Its massive 34-inch 3440x1440 panel comes with a variety of split-screen presets that can fit multiple tabs.
Pro Immersive experience
The 34UC99-W creates that experience of immersion because it's large 34-inch widescreen panel is also curved. The display feels like it surrounds you.
Cons
Con Lacks HDMI and DisplayPort
The only way to connect external hardware to this monitor is to use one of its USB-C ports.
Con Bad for competitive gaming
The LG 34UC99-W isn't responsive enough for it to be used in competitive action gaming because of its high input lag and low native refresh rate.