Long description

There are rectangular blocks placed one above the other labeled Registers, Cache, Main memory, and Magnetic disk / SSD from top to bottom. The smallest block labeled Registers is at the top. There are two types of information labeled Typical access time on the upper left and Typical capacity on the upper right. Part 1. On the left: less than 1 nanosecond. On the right: less than 1 Kilobytes. On the left: 1 to 8 nanoseconds. On the right: 4 to 8 Megabytes. On the left: 10 to 50 nanoseconds. On the right: 16 to 64 gigabytes. On the left: 10 milliseconds backslash 10 seconds to 100 micro seconds. On the right: 2 to 16 plus terabytes. The 16 to 64 gigabytes and 2 to 16 plus terabytes are categorized as optional persistent memory.