4GB [2x2GB] DDR2-400 (PC2-3200) ECC Registered Rank 1 RAM Memory Upgrade Kit for the IBM eServer xseries x346 2GB DDR2-400 PC2-3200 ECC Registered 240 Pin 1.8V CL=3 Rank 1 Memory 256X4 When you purchase RAM from 4AllDeals, it comes with a lifetime warranty, as well as lifetime telephone technical support from our US-based technicians. PLEASE NOTE* If you do not purchase this module from 4AllDeals direct, you do not get the lifetime warranty or tech support offered in this ad. Put your trust in a company that has been in business for 12 years, not some fly by night seller you won't be able to get ahold of! 100% Guaranteed Compatible for the computer listed in the title of this ad This module is an ECC module, which often must be installed in matched pairs. Please check your system to ensure that you can use a single module, or purchase in even numbers.