Pretty much every comment in the thread you linked is saying it's an obvious fake that makes no sense.Supposed RTX3090 Colorful branded AIB PCB
If real, the PCB has dual rank VRAM and a processing chip on each side of the card
https://www.reddit.com/r/nvidia/comments/i9dfrg/colorful_rtx3090_pcb/
EDIT -
Its got an intel CPU where the GPU should be
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