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A graphics processing unit (GPU) is a computer chip that performs rapid mathematical calculations, primarily for the purpose of rendering images.
In the early days of computing, the central processing unit (CPU) performed these calculations. As more graphics-intensive applications such as AutoCAD were developed; however, their demands put strain on the CPU and degraded performance. GPUs came about as a way to offload those tasks from CPUs, freeing up their processing power.
A GPU may be found integrated with a CPU on the same circuit, on a graphics card or in the motherboard of a personal computer or server.
NVIDIA, AMD, Intel and ARM are some of the major players in the GPU market.
GPU vs. CPU
A graphics processing unit is able to render images more quickly than a central processing unit because of its parallel processing architecture, which allows it to perform multiple calculations at the same time.
A single CPU does not have this capability, although multicore processors can perform calculations in parallel by combining more than one CPU onto the same chip. A CPU also has a higher clock speed, meaning it can perform an individual calculation faster than a GPU. Therefore, a CPU is often better equipped to handle basic computing tasks.
History of GPUs
Specialized chips for processing graphics have existed since the dawn of video games in the 1970s. Graphics processing units came to high-performance enterprise computers in the late 1990s, and NVIDIA introduced the first GPU for personal computers, the GeForce 256, in 1999.
Over time, the processing power of GPUs made the chips a popular choice for other resource-intensive tasks unrelated to graphics. Early applications included scientific calculations and modeling; by the mid-2010s, GPU computing also powered machine learning and artificial intelligence software.
In 2012, NVIDIA released a virtualized GPU, which offloads graphics processing power from the server CPU in a virtual desktop infrastructure. Graphics performance has traditionally been one of the most common complaints among users of virtual desktops and applications, and virtualized GPUs aim to address that problem.