64-bit is a CPU architecture that is capable of transferring 64-bits of data per clock cycle. More plainly, it's the amount of data your CPU can handle each time it processes information. You can think this architecture as a road that's 32 lanes wide; only 32 "vehicles" (bits of data) can go through an intersection at a time.
In more technical terms, 64-bit is referencing the width of the registers on a computer's microprocessor or the computer bus; sometimes called WOW64 and x64.
Examples of 64-bit processors
Below is a list of examples of 64-bit computer processors.
- AMD Opteron, Athlon 64, Turion 64, Sempron, Phenom, FX, and Fusion.
- All Intel Xeon processors since the Nocona released in June 2004.
- Intel Celeron and Pentium 4 processors since Prescott.
- Intel Pentium Dual-Core, Core i3, Core i5, and Core i7 processors.
Examples of 64-bit operating systems
There are many operating systems capable of running on 64-bit architecture including Windows XP, Windows Vista, Windows 7, Windows 8, and Windows 10. However 64-bit versions of Windows XP and Vista were far less common when they were popular.