You can make educated decisions about possible upgrades and guarantee compatibility with new memory modules by knowing the kind of RAM slots your system has available. rummy.olaDifferent types of RAM are available, each optimized for a particular set of system requirements and performance thresholds. At the moment, DDR3, DDR4, & DDR5 are the most widely used types. Although DDR3 still provides respectable performance and was commonly utilized in older systems, it has mostly been replaced by its successors.