GTX series cards don't fit in 1U/2U/3U rack servers very well due to the design of the coolers. The Tesla cards are available in passively cooled configuration

GTX series cards don't fit in 1U/2U/3U rack servers very well due to the design of the coolers. The Tesla cards are available in passively cooled configuration (just a big heatsink) which allows them to be cooled using the existing fans in the chassis. Facebook and Microsoft have their own 8-way GPU server designs that use a completely different connector for the GPU (SMX) instead of normal PCIe slots, again because of the motherboard/chassis design. (SMX is also used to expose the NVlink bus). https://www.nextplatform.com/2017/03/17/open-hardware-pushes-gpu-computing-envelope/ https://www.nextplatform.com/2017/03/17/open-hardware-pushes...