Product comparison
M521dn
A8P79A
M521dw
A8P80A
Paper handling Tray 1 (100-sheet capacity)
Tray 2 (500-sheet capacity)
Optional Tray 3 (500-sheet
capacity)
Standard output bin (250-sheet
capacity)
Rear output bin (50-sheet
capacity)
Automatic duplex printing
Supported operating
systems
Windows XP, 32-bit
Windows Vista, 32-bit and 64-
bit
Windows 7, 32-bit and 64-bit
Windows 8, 32-bit and 64-bit
Windows 2003 Server (32-bit,
Service Pack 3), print and scan
drivers only
Windows 2008 Server, print
and scan drivers only
Windows 2008 Server R2, print
and scan drivers only
Mac OS X v10.6 and later
Connectivity Hi-Speed USB 2.0
10/100/1000 Ethernet LAN
connection
Wireless network connection
Memory 256 MB RAM
Control-panel display Color graphical touch screen
Print Prints 40 pages per minute (ppm)
on A4-size paper and 42 ppm
on Letter-size paper
Walk-up USB printing (no
computer required
2 Chapter 1 Product introduction ENWW
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