The highest resolution supported by the NEC PA622 is 4096 x 2160. That's over three times the resolution of a 1920 x 1200 (WUXGA) projector, which is the most common resolution supported by projectors of a comparable spec and age to the PA622. 1920 x 1200 (WUXGA) is also supported by this data projector. This NEC data projector also support graphics resolutions of 2048 x 1080 and 2560 x 1600 (WQXGA) and 640 x 480 (VGA).
A 4096 x 2160 graphics resolution is actually the best supported resolution across all 6000:1 contrast ratio projectors that were released more than two years ago.
Across comparable types of data projector the worst supported resolution is 640 x 480 (VGA).