Most desktop PCs today have CPUs with basic integrated graphics capabilities, but some require a separate GPU (graphics processing unit) which comes in the form of a plug-in graphics card and can be several times more powerful. If you want to play 3D games at high resolutions with all the effects turned up, you're going to need a graphics card even if you already have integrated graphics. Today's integrated GPUs generally capable of anything a home or office PC might need, and can handle even 4K video playback. Graphics cards come in when you need to do anything more intensive, such as play high-quality 3D games, accelerate photo and video editing, or even just have multiple displays.
What is a GPU and how should you choose one?
The terms ‘GPU' and ‘graphics card' are often used interchangeably, but there is a huge difference. The GPU itself is the chip that determines how much power you get with each card. There are a huge variety of graphics cards from different manufacturers in the market, many of which are based on the same GPUs. No matter how impressive a graphics card looks, how many fans it has, and how expensive it is, the thing that matters most of all is the GPU. Each graphics card is built around one specific GPU with a suitable fan and a fixed amount of dedicated video memory.
In fact, many graphics cards from different brands will give you practically identical levels of performance. Companies such as Asus[1], Zotac[2], MSI[3], Sapphire[4], Gigabyte[5], and Galax are popular in India but they only create the packaging around GPUs. They rely on design, branding, and of course pricing to compete...