Deep learning can be 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 the most advanced CPU servers are no longer with the capacity of making the critical computation, and this is where GPU server and cluster renting comes in.
Modern Neural Network training, finetuning and A 3D MODEL rendering calculations usually have different possibilities for parallelisation and could 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 concentrate on your functional scope more instead of managing rent gpu server datacenter, upgrading infra to latest hardware, tabs on power infra, telecom lines, server health and so on.
A typical central processing unit, or a CPU, is a versatile device, capable of handling many different tasks with limited parallelis usuallym using tens of CPU cores. A graphical processing unit, or perhaps a GPU, is designed with a specific goal in mind - to render graphics as fast as possible, which means doing a lot of floating point computations with huge parallelism making use of a large number of tiny GPU cores. This is why, thanks to 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 clearly a base task for Deep Learning or 3D Rendering.