The reason why even rent a GPU server for deep learning?

Deep learning is an ever-accelerating field of machine learning. Major companies like Google, Microsoft, Facebook, and others are now developing their deep learning frameworks with constantly rising complexity and computational size of tasks which are highly optimized for parallel execution on multiple GPU and even multiple GPU servers . So even probably the most advanced CPU servers are no longer capable of making the critical computation, and this is where GPU server and cluster renting comes in.

Modern Neural Network training, finetuning and 3D rendering calculations usually have different possibilities for parallelisation and may require for processing a GPU cluster (horisontal scailing) or most powerfull single GPU server (vertical scailing) and sometime both in complex projects. Rental services allow you to focus on your functional scope more as opposed to managing datacenter, upgrading infra to latest hardware, tabs on power infra, telecom lines, server health and so on.

Why are GPUs faster than CPUs anyway?

A typical central processing unit, or a CPU, is a versatile device, capable of handling many different tasks with limited parallelism using tens of CPU cores. A graphical digesting unit, or a GPU, was created with a specific goal in mind - to render graphics as fast as possible, which means doing a large amount of floating point computations with huge parallelism using a large number of tiny GPU cores. That is why, because of a deliberately large amount of specialized and sophisticated optimizations, GPUs tend to run faster than traditional CPUs for particular tasks like Matrix multiplication that is rent gpu clearly a base task for Deep Learning or 3D Rendering.