HP Deskjet 6620 HP Deskjet 6600 series printer - (Windows) Reference Guide - Page 235

Best or maximum dpi print mode is selected The printer prints more slowly when Best or Maximum dpi is selected as the print quality. To increase the printer speed, select a different print-quality mode. Printer driver is outdated An outdated printer driver might be installed. For information about updating the printer driver, visit the HP Web site www.hp.com/support. Computer does not meet system requirements If your computer does not have enough RAM or does not have a large amount of free space on the hard drive, then the printer processing time will be longer. 1. Verify that the computer hard disk space, RAM, and processor speed meet the system requirements. For the system requirements, see the reference guide that came with the printer. 2. Make space available on the hard drive by deleting unneeded files. Printer is in ink-backup mode The printer might print more slowly if it is in ink-backup mode. To increase the print speed, use two print cartridges in the printer.