Differences between the HP 15c CE and the original HP-15C

[Gene]

The CPU is roughly 200x faster, but the final speed increase depends upon the mix of operations being executed (of course). Rather than promising all instructions will run at X times faster, the safer thing in the manual was to under promise.

The 178X faster than the original HP-15C is what I experience on your HP-15C Multiprecision e program.

Some operations are not much faster on the HP-15C CE than on the HP-15C LE, but some are faster.

For example, the N-queens problem found here on the museum site:

15C - 4750 seconds
15C LE - 28 seconds
15C CE - 25.5 seconds - 186 X faster than the original

The LBL A + GTO A loop run for 60 seconds

15C - 297
15C LE - 50,609
15C CE - 54,086 - 183X faster


but as I indicated earlier, not all functions show the same speed increases. At this year's HHC gathering, there will be a presentation on the speed of the various HP-15c incarnations.