My HP 10bII+ is much faster than HP 12c!

[SteveC]

Today, a new to me HP 38C just arrived with looking pretty amazing for having
been made in 1979. I tried the same cf0 +1000, cf 1-29 -1000, cf30 +49,000
and it yields the correct 3.652% & 100% IRRs after the reassuring Error 3 and
seeding. The 100% comes up pretty quick. The 3.652 takes about 23 seconds.

The bright red LED display took me back to the calculators I remember using in
high school. Cost effective LCDs were hitting the market as I graduated so college
was all LCD displays.