8MB 30-pin SIMMs, at least in the Mac world, are unusual. Usually, compatible cards for early Macs increase in size by a factor of four: 256kB, then 1MB, 4MB and 16MB, but 2MB is usable in a few of the compact AIOs. Apple's Service Source Memory Guide specifies 8MB for none of those Macs that use 30-pin SIMMs, so it will be interesting to see what results you get.

de