GHz. (n.d.). In YourDictionary. Retrieved from https://www.yourdictionary.com/GHz
(GigaHertZ) One billion cycles per second. High-speed computers have internal clocks rated in GHz, and radio frequency applications transmit in this range. For an explanation of how GHz and MHz affect computer performance, see MHz. See RF and space/time.
What makes processors different from each other is how efficient they perform calculations or, in probably more familiar terms, the speed of the computer, measured in gigahertz (GHz) and how many processing cores are embedded on the chip.
First, the new console utilizes a "Cell" processor, which can simultaneously run multiple tasks at 3.2 GHz, allowing the console to display finer detailed graphics (ideal for an HDTV) and greatly improve gameplay performance.
For the average computer user, a 250-500 GB hard drive with a dual-core processor at around 2 GHz, with 2 GB of RAM will run most software as long as you are not engaging in high end game play, with memory and power to spare.
But if you want to ensure a lag-free experience in low settings, be sure to have at least a 2.0 Ghz CPU, 512 MB of RAM (minimum bandwith of PC3200), and a 128MB graphics card that supports the latest version of DirectX.
Don't worry about the GHz speed because if you stick with Dual-cores and Core 2s/X2s for basic and medium-powered computers and Quad-cores for gaming and heavy use, you'll be fine.