> I meant that it's sad that we don't have RAM that can perform as fast as 
> the CPU itself.
>
> [Or rather... I guess we do, since that must be what they make the L1 
> cache out of. But the L1 cache is tiny, so...]

And, most importantly, it is very close to the CPU.

It's a cost/benefit thing, for $X how do you make the fastest computer?  The 
answer is to have a big slab of slow RAM, and progressively smaller bits of 
faster RAM.  Trying to do it another way will not make the fastest machine 
for a given amount of money.

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