>68882 - 32-bit FPU - Frequency: 16 - 50MHz
In my A3000D 030@25MHz, I've modded the 68882@25MHz to 50MHz!
In an (old) article, it was write that Commodore has tested these 68882 at 100MHz (information not confirmed!!).
So I think there is actually an operating margin, joekster is right: 50MHz can certainly work up to 66/70MHz!
