Gigabyte or Gigahertz - It's a Trick Question

Techno-Gibberish at the Computer Store

  • What is a Gigabyte: What is a Gigahertz:
  • A Gigabyte is a measurement of Size, and a Gigahertz is a measurement of speed.
  • We first need to know what is a Bit and what is a Byte - A Bit is a One or a Zero, and a Byte is a group of Eight One's and Zero's.
  • Why a group of eight you ask? The answer is simple, each group of eight bits represents a key on your keyboard. There are 256 combinations of keys. For example the letter "A" is 01000001.
  • To sum it up, a Byte is eight Bits.
  • A Kilobyte is 1024 Bytes
  • A Megabyte is 1024 Kilobytes
  • A Gigabyte is 1024 Megabytes
  • OK why 1024 instead of 1000? It is because computers are binary and they count in Hexadecimal. That means that while we count in 1 2 3 4 5 6 7 8 9 10. Computers count in 2 4 8 16 32 64 etc. etc.
  • Hex looks like 0 1 2 3 4 5 6 7 8 9 a b c d e f 10.
  • This is why when you get a computer hard drive that says it is a 1000 GB drive it only shows up as a 931.51 GB. Computers just count differently then we do.
  • In order to understand a Gigahertz then you need to know that one hertz is one cycle per second.
  • One kilohertz is 1,000 cycles per second.
  • One Megahertz is 1,000,000 cycles per second. That's a Million cycles per second.
  • One Gigahertz is 1,000,000,000 per second. Now we are at a Billion cycles per second.
  • So that new computer you want says it has a CPU that runs at 4.0 GHz. That's 4 billion cycles per second. But wait it has 4 cores! So theoretically it can run at 16 billion cycles per second. 
  • I see an ad for a 18 core Intel I-9 CPU - Wow - Today it's a ATM machine and tomorrow it will travel back in time to kill Sarah Connor.
  • I hope you have enjoyed this little lesson today, and if you have any questions then feel free to call or email My Techie Guys.