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June 21, 2011, 08:45:21 AM |
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There's no guarantee you'll ever find 50 BTC, and there's also no guarantee that you won't find bitcoins with a single slow machine. It's all a matter of probability, like buying a lottery ticket. If you buy a million lottery tickets (analogous to a fast cluster), you'll have a much better probability of winning than if you buy one (analogous to a slow machine).
So yes, you need to be in the multi-Ghash/s rate to have a reasonable shot at mining, but nobody can guarantee that you'll find any within any particular timeframe, no matter how much computing power you have.
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