Sunday, June 22, 2008

Computer Video Systems Monitor and VGA card

The video system includes the monitor and the video card/adapter. The monitor is a device similar to a television, which is the computer’s main output device.
hp computer monitorVideo Graphics Array (VGA) is an analog computer display standard that has been technologically outdated in the PC market for some time. However, VGA (with a resolution of 640×480 and 16 colors) was the most recent graphical standard that the majority of manufacturers conformed to, making it the lowest common denominator that all PC graphics hardware supports before a device-specific driver is loaded into the computer. For example, the Microsoft Windows splash screen appears while the machine is still operating in VGA mode, which is the reason that this screen always appears in reduced resolution and color depth. Today, computers use a higher resolution and more colors.

There are just tons of video cards out there to choose from, all saying they're the best and sporting snazzy graphics on the boxes to grab your attention in the store. Let me give you some general pointers:

Where it used to be we all used 2 MB cards and thought you were a gaming nerd if using a 4 MB card, all graphics cards today have a lot more- usually 64 MB or higher. Get it. It won't cost that much. Likewise, AGP is now the standard, so unless you're using a relic motherboard without an AGP slot, get an AGP video card. As for power, consider what you'll be doing with the PC. If you're doing mostly business and Internet and the occasional game, then you don't need a super-duper gaming card. A card with decent 3D and good 2D power is better for you. Most video cards on the market today are pretty decent at 3D and kick-ass at 2D. 2D really does not require all that much out of a video card. Watch the reviews to get viewpoints on different manufacturers

Some cards come with TV-out channels, video-in, or even TV tuners. This is great stuff, and if you can afford it, go for it. I would say, in general, though, that do-everything cards usually sacrifice performance tweaks, so if you’re trying to build an all-around kick-ass system here that pumps pixels so hard you’ll drool, get a card that does that with authority and don’t worry about the TV. you can buy a TV cheaper than some of those video cards. Make sure whatever you get is matched to your monitor. There is no sense in buying a cutting edge video card with killer refresh rates if you're using a clunker monitor that can't do it.

The number of pixels (colored dots) that can be displayed on the Monitor screen at one time is called the resolution of the screen. The resolution consists of two numbers, the number of pixels going from left to right and the number of pixels going from top to bottom. When you use a higher resolution, you will need additional video memory for the video system to store the additional pixels and more processing by the computer.

Color depth, or bit depth, is the amount of information that determines the color of a pixel. The more colors each pixel can show, the more colors the screen can show and the more shades of the same color, which can produce a more realistic, detailed picture. However, the higher number of bits required to give each pixel a higher color depth requires more video memory for the video system to store the pixel’s information and more processing by the computer.


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