Casio FX-991EX Scientific Calculator Review Footage taken from EEVblog Mailbag video #787.
Calculation speed comparison doing a sum from 0 to 100 of x^8 in both a Casio fx-991 SPX Iberia and Casio fx-991 SPX II Iberia.
Performing a slightly computationally intensive integral on both of these reveals quite a difference! The accuracy of the newer model is also notable.
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