Actually it can be the opposite - if the miner is using it properly and not overheating them regularly they can be in good shape. If they run at a high percenta

Actually it can be the opposite - if the miner is using it properly and not overheating them regularly they can be in good shape. If they run at a high percentage but the temperature stays constant then theres not a lot of wear going on vs suddenly heating and cooling all the time. I imagine the bearings in the fan might have more wear, however, but that might be more easily fixed.