Nvidia GPU's Relative Performance Comparison Chart (last few generations) (credits to u/soomrevised) : r/nvidia
Super handy quick reference guide for GPU ranking! Look here if you're thinking of building or upgrading. Even covers down to some GTX 900s. : r/buildapc
GPU comparison site for used and new cards : r/hardware
Nvidia GPU's Relative Performance Comparison Chart (last few generations) (credits to u/soomrevised) : r/nvidia
The new RTX 4090 founders edition graphics card size comparison to game consoles. : r/AbsoluteUnits