The PJ X6180N supports a maximum resolution of 1920 x 1200 (WUXGA). That's over seven times the resolution of the most common supported graphics resolutions of 640 x 480 (VGA) (which is also supported by this data projector). In addition, this Ricoh projector supports a supported graphics resolutions of 1024 x 768 (XGA).
A 1920 x 1200 (WUXGA) supported graphics resolutions is actually the best supported resolution across all comparable spec projectors that have been around for around the same time as the PJ X6180N.
Across similar types of projector the worst supported resolution is 640 x 480 (VGA).