I don't understand this technical things,
but the Activity Monitor shows 35-40% of cpu use (6% User + 30%System), regardless the buffer size of 256 or 512 samples.
The only thing that really counts is the ASIO monitor (Cubase4) which overloads at 256 samples and 30 VI instances.
with 9GB of RAM and I didn't reach the ceiling yet.
but the Activity Monitor shows 35-40% of cpu use (6% User + 30%System), regardless the buffer size of 256 or 512 samples.
The only thing that really counts is the ASIO monitor (Cubase4) which overloads at 256 samples and 30 VI instances.
with 9GB of RAM and I didn't reach the ceiling yet.