One thing about using used [,old] and free hardware is that it has power efficiency problems.
Newer hardware tends to be more power efficient (if you choose wisely). This means that newer hardware can "pay" for itself via energy savings alone. Less power consumed, less heat. If you have an abundance of excess "free" power, that you don't have a better use for, then perhaps old hardware might be better than new hardware from an environmental perspective. A reasonably good example of new vs old is the incandescent light globe against an LED. You could wait until the old one blows or replace it and start saving energy straight away. We have reduce, re-use and recycle; these are all important but sometimes replace is more important for all sorts of reasons. Cheers A.
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