One of the things that determine a computer speed is the physical memory of the computer. This memory is usually measured in Megabytes. The larger the amount of physical memory or RAM, the faster the computer will run. Typical RAM speeds on computers today are 512MB, 1GB and 2GB. One GB or gigabyte is equal to 1,000MB. Thus, before you run buying a computer, look at the size of its RAM. Operating systems like Windows Vista will require their users to have minimum system requirements. Windows Vista will only run on a machine with 512MB of RAM. The recommended memory is usually 1GB and above. Some software applications will also require minimum memory requirements before they can be run too.
Before buying a computer, consider also its processing speed. This is usually measured in GHz. Typical speeds include processor speeds of 2GHz, 3GHz or 3.2GHz. Modern processors have duo core processors. These processors are actually 2 processors that dramatically improve the computers processing. If you are buying a computer for running graphically-intensive applications, then consider buying a computer with a duo core processor. Speeds range from 1.8GHz to above 3GHz. A 1.8GHz duo core processor provides better performance than a 3.0GHz processor that is not duo core.
When buying a computer, it is also important to look at the amount of disk space that it comes with. This is the space available on the hard disk to store your information. Typical disk spaces include 80GB, 160GB and above. Here, you will want to go for as large a memory capacity as you can afford. overall, when you know what you are looking for, then buying a computer will likely not give you a headache.
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