The CHG90 supports AMD's Freesync 2 technology, which makes for ultra-smooth gameplay. It basically allows the graphics card in your computer to communicate with the monitor so that they can synchronize each frame with each other. That said, AMD's Freesync technology isn't compatible with graphics cards from the other PC graphics hardware giant, Nvidia, which is arguably the more popular of the two PC graphics cards makers.
Nvidia has its own technology to make gameplay ultra-smooth, called Nvidia G-Sync. While Nvidia cards may be more popular, G-Sync technology usually adds a few hundred dollars to a monitor's price tag compared to AMD's Freesync, which doesn't usually add any extra cost.
Still, whether you use Nvidia or AMD graphics cards, the CHG90 monitor has an incredibly fast one-millisecond response time, which reduces motion blur on the screen and helps keep the picture sharp, especially with fast-paced games.
The CHG90 also features Samsung's Quantum Dot technology, which makes for gorgeous colors, brightness, and contrast. Add HDR into the mix, and the picture is fantastic. A quick note about HDR: Games have to support HDR to make use of it, and the gaming world has been oddly slow to adopt it.