It may not own for some things, but it is a wonderful setup for the price.
Cache is a type of memory that is used by the processor for quick access. In this case the cache is actually on the chip.
Amd's dont get that much benefit from large cache, except in situations where the whole prog fits in the cache. It does seem to keep the chip cooler, and helps OCing.
cache is a small amount of memory located on die that runs amazingly fast, at the speed of the core.
Without cache, the cpu would run like a slug as every single data request would have to go out to main memory and back.
as far as A64 chips are concerned, going from 512k to 1mb cache gives you (very approximately) a speed grade better performance on average.
a 2.2Ghz with 1Mb cache is about the same as a 2.4Ghz with 512k.