What types of memory does the device contain?
The HP Color LaserJet Enterprise M681 and Managed E67550 series devices contain both volatile and non-volatile memory. Volatile memory is DDR3-DRAM used for temporary storage during job processing, retaining data only when powered on (Page 1). Non-volatile memory includes IOD EEPROM for backup/restore functions with a size of 32KB and SPI Flash for boot code and factory product configurations, totaling 4MB in size.
From the official HP Model manual, page 1
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