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« on: September 05, 2009, 07:56:25 pm »
RAM is a different sort of memory. Programs being run are stored in RAM while that happens, and it's very, very fast. If you don't have enough RAM, later versions of Windows (XP does it, so does Vista) and some other operating systems will use part of the hard drive space as a "virtual memory," which, while allowing you to run bigger programs, is much, much slower.
Example: On my old PC, I was able to run Battlefield 2 despite having HALF of the MINIMUM requirement. It just took about four times longer to load.
RAM comes in these sticks, they're not very big and they plug into their own slots.
You only need a few gigs of RAM because most programs don't take up all that much while running, and when not running, they're deleted from the RAM.
Gigahertz is a measure of your processor's speed. Basically the voltage in the processor is constantly flipping from low to high to low again, many times per second. How many times? One hertz is one complete cycle. One megahertz is one thousand. A gigahertz is one billion cycles per second.
As for checking your hardware stats, I don't know; I don't check often enough to remember how to do it easily.