Computer Screen Resolution

Computer graphics resolution is measured in pixels. A pixel is a very small point of light displayed on a TV or computer monitor. The screen quality depends by the total amount of horizontal and vertical pixels that can be displayed. For instance, a new computer monitor is able to display 1600 x 1280 pixels with millions of colors. The photograph resolution in digital cameras is measured by the amount of mega pixels that can be captured in an image.

Analog Frequencies

Hertz define how fast something cycles or refreshes. One hertz means one cycle per second. For example, the speed of the central processing unit (CPU) is measured by how fast it can cycle in order to complete commands, measured in hertz. A CPU that runs at 1000 MHz (megahertz) performs 1000 million cycles per second. Likewise, wireless communications and radio frequencies are measured in hertz.

There are many kinds of workstations and laptops. Not all the computers contain the same peripherals and components and this is what makes one workstation better for one thing and another workstation better for something else. The requirements for a computer dedicated mostly to Microsoft excel are very different than one intended for gaming or Adobe Photoshop. It is essential to define the future uses for a PC before purchasing the computer components.

There are more than a lot of companies that produce workstations and laptops nowadays. These computer systems are designed to perform well for a wide range of tasks. Many vendors also can custom assemble computer systems to meet end users’ needs and specifications.

A preassembled computer has the following advantages:

1. usually the cost is lower,
2. good performance,
3. we do not have to wait for assembly, and
4. can be used by less knowledgeable users who do not have special needs.

Unfortunately, a preassembled computer cannot achieve the performance level that can be found on custom built personal computers.

Custom Built Computers

A custom built Computer has the following advantages:

1. the customer can choose the particular components that meet his needs,
2. moreover they can support demanding applications like Photoshop, AutoCAD, games and server applications.

The problem is that usually they are more expensive than a preassembled device and you have to wait a little for the assembly to complete.

You can also buy the individual parts and component of a PC and build it. Whatever you decide to do you must make sure that the final product meets your needs. Some of the components to consider when buying a PC include: the motherboard, CPU, RAM, hard disk, graphics card, as well as the case and power supply.

Manolis Skoras is a Cisco, Microsoft and HP Certified Trainer and systems-network engineer. Recently he created a site about IT Certifications to help his students and people around the world to better understand the material they will be tested on, thus having greater success rates. Check Certify4Sure today!