PC4: In the context of DDR4 memory, \"PC4\" is an abbreviation for \"Partitioned Component 4.\" It\'s a module classification that indicates the memory module\'s data transfer rate, voltage, and other technical specifications. Specifically, \"PC4\" is associated with DDR4 memory modules.

8GB: This refers to the capacity of the DDR4 memory module. In this case, the module has a total memory capacity of 8 gigabytes. This indicates how much data the memory module can store and quickly access for the computer\'s operations.