Conclusion: The Lexmark T640n delivers fast performance for its price and engine speed, better quality for text and graphics than most monochrome lasers, capable paper-handling for a small office, and some notable conveniences, including the ability to print PDF files directly from USB keys.
Pros: Exceptional performance. Convenient printing of common file formats directly from USB keys. Includes network connector.
Cons: Photo quality is at the low end of the range for a monochrome laser.
Excerpt: Lexmark's T640n is a powerful and robust network printer, designed for use in workgroups or small departments. Its mono laser print engine is rated at 33 pages per minute (ppm), and it can print at 1,200 dots per inch (dpi) resolution. To meet the demands of high-volume printing, this printer has a duty cycle of up to 200,000 pages per month. As you'd expect from a workgroup printer, the T640n supports a wide range of protocols and print languages.