discrete transistors

From: Allison J Parent <allisonp_at_world.std.com>
Date: Mon Oct 19 15:12:33 1998

< From: William Donzelli <william_at_ans.net>
<
< Sure, a Dell Pentium machine might be plenty fast by the book, but simpl
< put, it could not even come close to sustaining that speed (140 Mflops f
< the Cray-1). A superfast CPU will always loose to slow I/O.
<
< Its all in the architecture...


yes, steaming along at 140MFLOPS only to slam into the IO bus that if ISA
*may* be able to sustain 16mb/s. PCI may be faster, I'd suspect in the
30+mb/s range (unknown to me). Anyhow being able to gind lots of numbers
is limited by memory bandwidth and maybe disk IO bandwidth and
PCs are not notably fast in that depatment. Cray and those other
machines were possibly a bit slower but they didn't have that I/O
bottlenecks.


Allison
Received on Mon Oct 19 1998 - 15:12:33 BST

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