SK Hynix brand 16GB DDR3 RDIMMs (registered DIMM) RAM memory for sale. PC3-14900R / DDR3-1866 from BC government Cisco servers 2Rx4 factor model no. HMT42GR7AFR4C in lots of 4 only ($160) or $300 for 8. tested to be working and compatible with a Lenovo S30 (working at 1600 MHz bus speed in 128 GB (8 x 16 GB) configuration. Will respond to all bona fide correspondence. If you don't see a reply, check your spam folder