Lexmark T642 Service Manual - Page 24
Memory configuration, Operating clearances, Available memory options, Memory type - t640 manual
UPC - 734646722001
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4061-xx0 Memory configuration Memory type Models Lexmark T640 Lexmark T640n Lexmark T642 Lexmark T642n Lexmark T644 Lexmark T644n Standard DRAM (MB) 64 64 64 128 128 128 Optional memory (MB) (100 pin DDR SDRAM unbuffered DIMMs) 128, 256, and 512MB available Maximum (MB) 576 576 576 640 640 640 Optional flash memory 32 and 64 MB available Note: One firmware card and one flash memory card are supported. Either slot supports both card types. Depending upon the options and features used, additional memory may be required to optimize performance. Available memory options Optional 128MB, 256MB, and 512MB SDRAM DIMMs are available from Lexmark. The memory options are 168-pin synchronous DRAM DIMMs. Flash memory options include 32MB and 64MB. Operating clearances Printer side Measurement Left and right side 12 in. (30.48 cm) Front 20 in. (50.8 cm) Rear Top* 12 in. (30.48 cm) 54 in. (137.16 cm) * Allow clearance above the printer front door clearance and for adding options, such as additional input drawers, output expander, high-capacity output stacker, or StapleSmart finisher. 1-4 Service Manual