I didn't know 020s came in speeds lower than 14MHz. What board is that?
There are a few 7Mhz 020 boards. They were used for rendering and math, and really nothing else. In all likelihood, there may have been no reason to clock even to 14Mhz, since the asyc. 68881/82 would be the workhorse.
The one this poster has is the Sapphire - a board most famous for powering the first generation full immersion Battletech simulators by FASA.
The AdSpeed seeks to solve the problem of speeding up general Amiga 500 tasks. The tiny cache combined with the 14Mhz processor really does more or less double the processor speed of the 500. There are also users who upgrade the 68000 with a 68010, and gaining a further 2-10% performance increase beyond the normal adspeed.
