ATI vs NVidia Who is the best

When the processor market is dominated by two giant that is Intel & AMD, then the VGA market is also dominated by two major players, ATI & NVidia. Incidentally ATI some time ago has been acquired by AMD. In general, the performance of artificial VGA ATI and NVidia fairly balanced in the same class. The price was relatively comparable. EACH Each has advantages and disadvantages.
As of today, ATI is still superior in the aspects of Image Quality (IQ or picture quality) is superior in performance NVidia 3D frame rates (frames per second speed of appearance).
Again, please caution interpreting this statement. Not that ATI's 3D performance was bad or vice versa NVidia bad IQ. to play 3D games, the ATI can be used well, too.
Similarly NVidia still looks fit enough to watch DVD High Definition.Dan from time to time, each manufacturer will attempt to overcome the shortcomings so that someday soon, we could see both balanced within all aspects. Until that happens, it's good if the computer is widely used to design graphics or watch a movie, a VGA card ATI is a better choice, but if the computer is widely used for playing 3D games, let alone the latest output, VGA NVidia who could be more fitting choice.

VGA Component in order To be Optimal

Graphics card, video card, or VGA (Video Graphics Adapter) Output Card is a device whose job is to process data into graphical or text display on the monitor screen. VGA serves to connect the computer system with monitor. VGA card supporting applications that require drivers. Driver serves as an intermediary for the operating system and graphics card.

Components VGA card:

1. GPU (Graphics Processing Unit)
GPU is a processor of a video card, and serves for processing the image data to be displayed on the monitor screen.

2. Video Memory (VRAM)
Serves as a temporary storage before and after processing the data on the GPU. At present,generally with a capacity between 256MB to 2048MB.

3. RAMDAC (Random Access Memory Digital - Analog Converter) Function transform digital images into analog signals to be used by the monitor.

4. bus Interface Serves to connect the motherboard to the graphics card. Currently, the default is PCI-Express.

5. Display Interface
Serves to connect the graphics card and monitor. There are many display port, however, which is often used for, among others, D-Sub, DVI, and HDMI.

6. cooling fan (cooler)
Serves to cool the GPU.