In June 2018, Lexmark introduced the MS/MX 720 and 820 Series laser printer & multifunction printer (MFP) all have OEM-rated print speeds of 55 - 70 pages per minute in black and duty cycles of 250,000 - 350,000 pages per month. 
All models come with start cartridge range from 2000 page yield to 6000 page yield, which lets users print right out of the box.  The MS821/MX822 and MS823 utilize a standard 7500 page yield and a 15,000 page high yield cartridge.  All utilize a 150,000 page yield drum unit.  The MS821/822/823/826 and MX822/826 printers add a 35,000 page extra high yield and a 55,000 page ultra high yield cartridge to the supplies set.   However, cartridge SKUs vary depending upon the market region in which they are sold.
Toner cartridges require a chip for correct printer operation.