The most resolution of the Viewsonic VT2756 is 480i. That's 56% less resolution than a 1080i LCD screen, which is the most frequently found resolution. 1080i is also found on this PC screen. In addition, this LCD screen have 1080p and 480p and 720p video modes.
A 480i video mode is in fact the worst resolution amongst all similar spec PC screens that are a comparable age to the VT2756.
A 2160p video mode is the best resolution amongst comparable types of PC display.