4GB DDR3 / DDR3L PC3-12800E 1Rx8 (Single Rank) 1.35V Low Voltage ECC Unbuffered Server Memory Module (240-pin DIMM 1600MHz)
Designed for easy installation and maximum compatibility with your Lenovo ThinkServer RD640 (Please verify the capabilities of your CPU)
Genuine A-Tech Brand Lifetime Warranty + Free United States Based Technical Support
WARNING! This module is ECC UNBUFFERED! All modules in your system MUST be the same ECC Type in order to properly function.
Please Verify The Memory (RAM) Technology Support Capabilities Of Your System Prior To Purchase