diff --git a/guide/english/computer-hardware/cpu/index.md b/guide/english/computer-hardware/cpu/index.md index 70535a1269e..daedf6645f2 100644 --- a/guide/english/computer-hardware/cpu/index.md +++ b/guide/english/computer-hardware/cpu/index.md @@ -9,7 +9,7 @@ CPUs are integrated circuits, which are complex circuits embedded on a single ch CPU speeds are measured in gigahertz (GHz). For every gigahertz of speed, a CPU can perform one billion instructions in a second. These instructions are very simple, such as "add two numbers" or "move this variable to this location." To see this in action, read about assembly language. -Gigahertz is not the only determining factor in the actual speed of a processor, as different processors with the same gigahertz speed (also known as clock speed) may perform real-world tasks at different speeds due to using different sets of instructions to perform these tasks. These instruction sets are called CPU architectures. +[Gigahertz](https://en.wikipedia.org/wiki/Hertz) is not the only determining factor in the actual speed of a processor, as different processors with the same gigahertz speed (also known as clock speed) may perform real-world tasks at different speeds due to using different sets of instructions to perform these tasks. These instruction sets are called CPU architectures. Most modern CPUs use a 64-bit architecture, which means they use 64 bit long memory adresses. Older CPUs used 32-bit, 16-bit, and even 8-bit architectures. The largest number a 64-bit CPU can store is 18,446,744,073,709,552,000. A CPPU need memory adresses to get specified values from the RAM. If we call the length of the memory adresses n, 2^n is the amount of memory cells a CPU can adress.