Upto 12 ppm, 8MB RAM, 133 MHz, 600dpi, 10second first page out with HP instant-on fuser technology.
 

Up to 14ppm, 16MB RAM, 133 MHz, 1200 dpi effective output, 10 second first page out with HP instant-on fuser technology.

 

Up to 20ppm, 1200 dpi effective output, 16MB RAM ,133 MHz, 10,000 pages per month duty cycle, 10 second first page out with hp instant-on fuser technology.

HP LaserJet 1320 Printer - prints up to 22 ppm, 1200 x 1200 dpi resolution, 16 MB expandable to 144 MB, input tray - 250 sheets, up to 10,000 pages per month duty cycle, 1 USB 2.0 port