It does something, just not very much of it! Anecdotally difficult to perceive in general use but shows up in benchmarks to varying degrees.
Apple Personal Diagnostics and DayStar Power Demo:
Speedometer 4.02:
Norton System Info 3.21:
MacBench 4.0:
For these tests I played with the QuadControl control panel "Quadra Boost" ROM in RAM setting, its seems the "MAX" setting (MQB below) provided some increased benefit with the FastCache Quadra over the default "Good" setting (GQB below) but not so much without the card installed.
Those stats are some reassurance at least - thanks!
I got no difference in any of my APD tests - maybe my card is faulty or I’m missing some Daystar software?
I’ll try out Speedometer next… or even Doom?!?