Still have a problem? Ask for help at our discussion forum.


Advanced Search

 »  Home  »  Computer Encyclopedia  »  What is 32-bit / 64-bit CPU?
What is 32-bit / 64-bit CPU?
Published  06/30/2011 | Computer Encyclopedia | Rating:
What is 32-bit / 64-bit CPU?
"32/64-bit" refers to the width of the address bus and registers used by the CPU core. A 64-bit CPU has a 64-bit wide address bus and 64- bit wide registers. CPUs access data in the RAM by using the address bus. The breadth of the bus influences the amount of RAM that can be addressed. A 32-bit bus allows a maximum of 4 GB of RAM to be accessed. A 64-bit CPU, obviously, allows for more RAM to be used - about 16 exabytes (1 exabyte = 1,000,000,000 gigabytes, approximately). A 64-bit register can store 64 bits of data simultaneously. To fully utilise a 64-bit CPU, the operating system and application need to support the 64-bit mode of operation.
How would you rate the quality of this article?
1 2 3 4 5
Poor Excellent

Enter the security code shown below:

Add comment

Popular Articles
  1. List of IrfanView Shortcuts
  2. When replying to a message in Outlook, a copy goes into the Inbox
  3. Precautions to take while using internet in Cyber Cafes
  4. List of uTorrent Shortcuts
  5. Windows 7 Startup and shutdown time
No popular articles found.