Server Memory Upgrade Bundle This bundle contains 8 x Dell 64GB 2666MT/s memory modules to increase your server performance and provide a driven and efficient device. With 512GB PC4-21300-LR DDR4 memory, you'll experience boosted server speed and productivity. Increased Reliability for your Dell Server This server memory module features ECC (error-correcting code) which finds and corrects common internal data corruption, preventing negative consequences such as system crashes or downtime. The modules in this Dell server memory bundle is also registered (buffered), encouraging stability in the individual components with the addition of a register between the DRAM modules, thereby improving stability in the system as a whole. This server memory bundle is compatible with the Dell PowerEdge R640, R740, M640, R440, R540 and T440. If you have any questions please get in touch with our team.