(credit: Samsung)
4K has saturated the TV market, but the sharpest mainstream display resolution is not as common in PC monitors, due to price and limitations. PC gamers specifically opt for PC monitors because they can generally hit higher refresh rates than TVs, which are typically at 60 Hz or 120 Hz, making fast-paced gaming action look smoother. But refresh rates higher than 144 Hz usually require sticking to QHD resolution or lower. Samsung's introduction today of a 4K monitor that can hit 240 Hz changes that.
Samsung told me it will announce the price and release date for the monitor, part of the brand's announcements for CES 2022, "later this year." If it arrives in 2022, it should be the fastest 4K monitor on the market—assuming another brand doesn't announce a similar screen (who knows what else we'll hear about at CES; the tech show doesn't even officially start until Wednesday).
4K at 240 Hz
The Odyssey Neo G8 has a 1 ms GTG response time and is able to refresh 8,294,400 pixels 240 times per second. When asked, Samsung didn't specify if the monitor uses compression to do so, but it apparently does because its port selection is comprised of two HDMI 2.1 and one DisplayPort 1.4.
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source https://arstechnica.com/?p=1822746