A Cisco equivalent 16 GB Kit Low Voltage , registered ECC DDR3 SDRAM - DIMM 240-pin 1333 MHz ( PC3-10600 ) from HypertecNote - Hypertec CISCO equivalent memory is functionally equivalent to the CISCO product, but may demonstrate a warning message with respect to unestablishable identity, or invalid FRU. This does not affect operation. - More Info