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Journey to the 4K frontier
Of all the variables PC gamers can control, the display resolution is arguably the most important for achieving a sense of realism. On low-resolution monitors, each pixel is visible, and the blockiness of the images on those monitors tells our brains that we're looking at a screen rather than the real world. A 4K monitor displays games and video with incredible clarity and detail, and it also ensures that even a large display like the PG43UQ will look crisp at all times.
Getting a 4K 144Hz HDR signal with full per-pixel color information to the display requires more bandwidth than even a single DisplayPort cable can provide, however. One widely-used solution to this limitation, chroma subsampling, takes advantage of the fact that our eyes are more sensitive to differences in brightness than differences in color to optimize the use of bandwidth, enabling high-refresh-rate 4K gaming experiences with minimal reduction in fidelity. Chroma subsampling generally isn't noticeable in moving images like games, but some users might notice a slight reduction in text clarity on the desktop.
A refresh rate as fast as your reflexes
Gamers insist on playing at the highest resolution their graphics card can handle, but they also demand displays with high refresh rates for a smooth, immersive gaming experience. A 60FPS frame rate paired with a 60Hz display was the gold standard in PC gaming for many years, but advances in both graphics card performance and display technology have opened new horizons.