But its not available to the CPU. A couple posts up the chain has a link showing the CPUs are incapable of coming anywhere close to the full bandwidth of the memory.
> Usually when we say bandwidth, we mean bytes/second, to and from the caches and main system memory.
I thought that the registered memory of high end
server processors that could support 100+
GB of main memory were significantly slower
in bandwidth than the DDR3/4 main memory
of consumer processors.
The theoretical processor bandwidth is one thing; the actual throughput on motherboards with existing slow memory chips (DDR2-667 according to the specs page) is quite a different matter.
This becomes a pretty big deal when you have that many cores all hammering on it at once. Divide by 32...
Memory is orders of magnitude slower than the cpu at the moment, so you'd need orders of magnitude more bandwidth to come close. So sure, it's going to be faster, but the cpu is still going to be waiting for memory more than the other way round.
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