Lexmark 3455 - Manual (Page 171)

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C. Recommended memory
Minimum total recommended printer memory for each resolution setting. Additional
memory above the minimum recommended may be required for printing complex jobs.
300 dpi, Simplex 4MB
300 dip, Simplex and saving IPDS resources* 8MB
300 dpi, Duplex 4MB
300 dpi, Duplex and saving IPDS resources* 8MB
600 dpi, Simplex 4MB
600 dpi, Simplex and saving IPDS resources* 12MB
600 dpi, Duplex 4MB
600 dpi, Duplex and saving IPDS resources* 12MB
1200 dpi, Simplex 8MB
1200 dpi, Simplex and saving IPDS resources* 16MB
1200 dpi, Duplex 12MB
1200 dpi, Duplex and saving IPDS resources* 16MB
* Saving of IPDS resources is activated when the host timeout and printer IPDS
Timeout values are properly set. See IPDS Timeout on page 40 and the
appropriate host operating system setup section for more information.