The flagship GV100 was more than 30% larger than the previous gen GP100 (Pascal-based) GPU, operating on TSMC's 12nm FFN process. The only Volta GPU Nvidia made for desktop PCs was the Titan V ...
TL;DR: NVIDIA's GeForce RTX 50 series ... The quad-slot, triple-fan cooler with that wicked rotated PCB was most likely an RTX TITAN series GPU, confirmed with dual 16-pin power connectors.