Because the color printing can produce black and white text print 20-100 times the amount of data, make your CPU, memory, hard disk burden. Increase the computer memory, reduce the print resolution, to drive the high-speed printing options in the program effectiveness is the effective way to improve the printing speed. When you print only black and white text, can print driver selection black printing, print quality is set to ink, cancel the microweave and select high speed printing, select no halftoning.Mi2service manual download site