Cheap and Refurbished Dell system - Electro Computer Warehouse

All computers are connected with some type of display. In most cases this is a monitor.
There are two different types of monitor.CRT (Cathode Ray Tube): the most common type of screen. This is the traditional picture tube, a big glass bottle. This is just like a television.LCD (Liquid Crystal Display): flat and soft displays. The prices of these screens range higher than CRT's.
The principles behind these screen types are different, but the screen image design is still based on the same concepts.
Pixels: The screen image is made of pixels (tiny dots), which are arranged in rows across the screen. Each pixel consists of three colours: red, green, and blue (RGB).
Dot pitch: This is a measurement of how close together the phosphor dots are on the screen. The finer the dot pitch, the better image quality you will have; look for the smaller number. Most monitors today have a 0.28mm dot pitch. Some have a 0.25mm dot pitch.
Refresh Rate: The screen image is refreshed many times per second. Refresh rates are measured in Hertz (HZ), which means times per second. The higher the refresh rate, the screen image appears more steady.
Colour Depth: Each pixel can display a number of different colours. The number of colours which can be displayed is called the colour depth.
Video RAM (VRAM): All video cards have some memory. How much depends on the desired colour depth for the monitor. The more VRAM a video card has, the more the amount of colours can be displayed.
Resolution: The greater the number of pixels in the screen, the better the resolution. The greater the resolution, the sharper the image will be.