The NEC NP-PA521U supports a maximum resolution of 1920 x 1200 (WUXGA). That's over seven times the resolution of a 640 x 480 (VGA) data projector, which is the most common resolution supported by multimedia projectors of a similar age and type to the NP-PA521U. 640 x 480 (VGA) is also supported by this projector. In addition, this multimedia projector support supported graphics resolutionss of 1024 x 768 (XGA), 1280 x 1024 (SXGA), 1400 x 1050 (SXGA+) and 1600 x 1200 (UXGA) and 800 x 600 (SVGA).
A 1920 x 1200 (WUXGA) supported graphics resolutions is in fact the best supported resolution amongst all comparable spec multimedia projectors that were released around the same time as the NP-PA521U.
A 640 x 480 (VGA) supported graphics resolutions is the worst supported resolution across comparable types of projector.