dalamar70
Member
Registered: Mar 2001
Location: Champaign, IL
Posts: 200 |
The bus is used for data transfers between CPU, memory, peripherals, etc., so overall a faster bus is better. New PCs have 100-133MHz buses with tricks to speed it up (dunno if the Macs do too).
Probably the most frequent transfers are from the CPU to main memory. A cache is a special small (32KB-1MB) memory that can be accessed much faster than main memory. It seems like the Ti Powerbook G4 has a larger but slower (external) cache than the new iBooks. I don't know which would work out better in practice, but new Pentium III and Athlons all go with the faster internal caches.
Altivec the equivalent of Intel's MMX/SSE/SSE2 extensions, which means it can process a bunch of numbers at the same time. Just like SSE, properly written applications that need this capability will run a lot faster (mostly multimedia stuff like Lennonhead said).
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