A PC builder has managed to install four Nvidia GeForce RTX 2080 Ti graphics cards in the tiniest of desktop cases, and then proceeded to amass a huge score of over 3,500 points on OctaneBench while claiming that none of the GPUs exceeded a temperature of 75 °C /167 °F. The customized desktop, which is apparently used for rendering work, also features an AMD CPU.
https://www.notebookcheck.net/Speedy-custom-desktop-with-4x-RTX-2080-Ti-cards-rips-apart-OctaneBench-without-going-over-75-C.420141.0.html