The 605, having an LC040, is used only for the non-maths-intensive tests. Effectively, the number for each IIci test is a ratio of the number of flops (or outcomes) compared to the 605. Because the 650 has a full 040, it is used in place of the 605 in maths-intensive tests, but again the IIci figures are ratios. No account is taken of CPU speeds, either relative or absolute (or so I divine) in the tests, which are just raw performance indicators.

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