LENOVO 4X70K09921 COMP 8GB DDR4-2400MHZ 1.2V SRX8 UDIMMAddOn 8GB DDR4 SDRAM Memory Module 8 GB (1 x 8GB) DDR4 2133 PC4 17066 DDR4 SDRAM 2133 MHz Single rank Memory CL15 1. 20 V Non ECC Unbuffered 288 pin DIMM Lifetime Warranty VPN: 4X70K09921 AA SKU: RSC678673 UPC: 821455543863 8 GB bar will run multiple applications together and enhance your computer's performance 2133 MHz memory speed with Unbuffered signal and CL15 latency for great multitasking capability DDR4 SDRAM operates at an effective bus speed