Model : HMA451U6AFR8N. DDR3 / PC3-17000 / 2133MHz / 240 Pin. Manufacturer : SK Hynix. (4) x 4GB = 16GB.
SK Hynix 4GB DDR4-PC4-19200U (DDR4-2400) Single Rank Non-ECC UDIMM RAM HMA851U6A
SK Hynix 16GB DDR4-PC4-25600 (DDR4-3200) UDIMM RAM HMAA2GU6CJR8N-XN
SK hynix 4GB DDR4-PC4-17000 (DDR4-2133) 1Rx8 Non-ECC UDIMM RAM HMA451U6AFR8NTF
SK hynix 8GB DDR4-PC4-17000 (DDR4-2133) ECC RDIMM RAM HMA41GR7MFR8N-TF
SK hynix 16GB DDR4-PC4-19200 (DDR4-2400) Dual Rank Non-ECC UDIMM RAM HMA82GU6 #2
SK Hynix 8GB DDR4 2400MHz PC4-19200 Non-ECC Unbuffered RAM HMA81GU6AFR8N-UH