At 02:26 PM 5/4/00 +0000, Thomas Lockhart wrote:
>From what I've read, the extra cache in the PII/III gives you a 5%
>boost over the Celeron (I'll guess more for some server apps).
For a db server the 100Mhz memory bus of the PII/III probably
wins more than 5% over the 66Mhz memory bus of the Celeron. This
assumes you're database is reasonably big. Lots of memory transfers
going on...
>Intel
>still sells the Xeon chips, which have a cache twice as big as the
>PII/III, but I'm not sure the clock has kept pace and it was always
>overpriced wrt performance.
Katmai Xeons come with cache size ranging from 512K (the same as a PII/PIII
Katmai) to 2MB. That cache, though, is FULL SPEED. Gets you about 10%
over a PII/III Katmai for server-type benchmarks I've seen. But they're
expensive.
You can also go 4-way SMP with them, vs. 2-way with PII/III...
Now the new Coppermines have changed things...the Xeon Cu and PII/III
Cu both have identical 256K full-speed cache. There's not much reason
to buy the Xeon unless you want 4-way SMP, and Intel recognizes this
apparently because the price is only 10% higher for these new parts.
>Not that anyone asked, but imho the best price/performance x86 machine
>has always been a dual processor box one or two clock jumps behind the
>fastest available.
That's what I did, a dual PII450. I bought them (boxed, fan) for $180
each when PIII450s were $250 or so and PIII 500Es $299 (I bought one
of the latter for a home workstation). So it's a PII without the
latest matrix instructions for graphics? How many games will I
run on my web/db server? :)
>You get ~80% more performance for ~5% more cost
>than a uniprocessor at the fastest speed. I haven't looked recently to
>see if there are now uniprocessor machines at the low end that can
>beat the price/performance of the dual-processor setup.
The Athlons do, actually ... but I wouldn't trust the mobos for a
remote server at this point, not until they're proven stable. They're
tricky to build and finicky about power supplies.
- Don Baccus, Portland OR <dhogaza@pacifier.com> Nature photos, on-line guides, Pacific Northwest Rare Bird Alert
Serviceand other goodies at http://donb.photo.net.
