Lenovo 4 GB, DDR4, 2400 MHz, Notebook, Registered No, ECC No, 260-pin SODIMM

8GB PC4-2666 CL19 288-Pin DIMM

Kingston's KSM26RS8/8HAI is a 1G x 72-bit (8GB) DDR4-2666 CL19 SDRAM (Synchronous DRAM) registered w/ parity, 1Rx8, ECC, memory module, based on nine 1G x 8-bit FBGA components. The SPD is programmed to JEDEC standard latency DDR4-2666 timing of 19-19-19 at 1.2V. Each 288-pin DIMM uses gold contact fingers. 

Lenovo 8 GB, DDR4, 2400 MHz, PC/Server, Registered No, ECC No

16GB PC4-2666 CL19 288-Pin DIMM

Lenovo 8 GB, DDR4, 2400 MHz, Notebook, Registered No, ECC Yes

Dell 8 GB, DDR4, 2666 MHz, PC/server, Registered Yes, ECC Yes, (PowerEdge 14G: R440,R640,R740,T440; 13G: R430,R530,R630,R730,T430,T630)

Increase the capabilities of your computer and improve system performance and application responses using energy-efficient, fast DDR4 memory.

Lenovo 16 GB, DDR4, 2400 MHz, Notebook, Registered No, ECC No

Dell 16 GB, DDR4, 2666 MHz, PC/server, Registered Yes, ECC Yes, (PowerEdge 14G: R440,R640,R740,T440; 13G: R430,R530,R630,R730,T430,T630)