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Posted by nappy on 04/13/07 18:07
<mmaker@my-deja.com> wrote in message
news:1176478201.621892.70030@w1g2000hsg.googlegroups.com...
> On Apr 13, 4:07 pm, "nappy" <s...@spam.com> wrote:
>> <mma...@my-deja.com> wrote in message
>> > But if the CPU is having to access RAM, it's already screwed because
>> > the latency of memory accesses is large no matter how fast they run.
>> WHAT?
first of all the statement above makes little sense. Where do you think the
cache is filled from. ?
>
> Is it really that difficult to understand?
The way you put it makes no sense.
> If your data isn't in the
> cache, you have to wait for the memory access to get out onto the bus
> and talk to the RAM... saving a few clock cycles with faster RAM
> doesn't make much difference to an operation that takes tens of clock
> cycles anyway.
By the above paragraph there is no reason ever to even bother increasing Ram
speed.
Cache will be filled faster with faster ram. So Faster RAM does increase
effective computational speed. Whether or not it is perceptible.
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