Miners tweak settings to minimize power usage, i.e. undervolt and maybe even underclock the card. That's much better for the GPU than, say, pushing the card to

Miners tweak settings to minimize power usage, i.e. undervolt and maybe even underclock the card. That's much better for the GPU than, say, pushing the card to the limit for benchmark scores :D But generally, GPUs become obsolete before they die.