Youtuber Bryan, who runs Tech Yes City, picked ten 'untested' Inno3D GTX 1070 8GB GDDR5 GPUs, likely from a mining farm, which he later confirmed upon personal inspection. The ad was on the Facebook AU marketplace, where the seller was upfront about the condition of these GPUs, stating that it is likely one or two graphics cards are working only via its DVI port- which he also says could be the fault of his PC. Still, these are pretty cheap, and the cards can likely be repaired or salvaged as a donor board. It is a gamble, but for AUD 180 (later reduced to AUD 150), roughly $100, it could be worth it in some form. Bryan said that he has been getting into soldering capacitors on motherboards.
Before Bryan could fire up these graphics cards, Bryan gave them thorough cleaning as running graphics cards in a mining environment tends to pick up a lot of dust. The graphics cards are abused to the point there would be some rust in the components; hence, agitating it is necessary, especially for the video output ports. All the GPUs were dilapidated, and Bryan found it surprising that the seller claimed at least one of the GTX 1070 was working. Irrespective of its outcome, he hoped that these graphics cards were undervolted when mining and would have to undervolt the graphics card.
