|As shown week after week, the "market" gives high price evaluations to NVDA and AMD for their GPU processors.|
Majority of shipments of discrete GPUs used in mainstream servers come from NVIDIA and AMD, according to DRAMeXchange’s market tracking during the first half of 2017. In terms of the global shipment share for this half-year period, NVIDIA managed to take nearly 70%. NVIDIA’s main offerings for high-end servers are still based on the Pascal architecture. Solutions derived from this platform are mainly designed for large-scale Internet data centers.
A description of how the GPU works in conjunction with the CPU is provided at:
And if you would like to buy one, you can peruse the offerings on Google. They even provide "free shipping":-)