Epoch
Four-year period between Bitcoin halvings, marking a mining reward cycle.
Related terms
EAL (Evaluation Assurance Level)
Security certification rating (1-7) for IT products under Common Criteria evaluation.
Efficiency
Measure of hashrate produced per unit of power consumed (J/TH for Bitcoin miners); lower is better.
Efficiency Delta
Difference between hashrate reported by the miner hardware and hashrate credited by the mining pool.
Every Day You Wait is Revenue You Lose
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