The highest resolution supported by the Optoma EW865 is 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 2000:1 contrast ratio data projectors that were released around the same time as the EW865. This multimedia projector also support supported graphics resolutionss of 1024 x 768 (XGA), 1280 x 1024 (SXGA), 1280 x 720 (HD 720), 1280 x 768 (WXGA), 1400 x 1050 (SXGA+) and 1600 x 1200 (UXGA) and 800 x 600 (SVGA).
A 1920 x 1200 (WUXGA) supported graphics resolutions is actually the best supported resolution across all data projectors of this age and type.
The worst supported resolution amongst similar types of projector is 640 x 480 (VGA).