At 10:39 AM 11/27/2001, you wrote:
its cache and bus. The Xeon comes in a variety of cache sizes up to 2MB,
and it runs at the full speed of the CPU core. The P2 and older P3 cache
ran at half the core speed. Celerons and later P3s ran the cache at full
core speed, but only with 128 or 256K in 'em.
The bus probably has the biggest impact on server performance. Plain
Pentiums are limited to 2 CPUS in a multi-CPU system (at least with Intel
chipsets.) And they share bandwidth on the same address and data
bus. Xeons and their chipsets can go to 8, maybe higher, CPUs, and each
one gets a dedicated bus.
One of my favorite vendors is listing P-III Xeons up to 1GHz with
133fsb. Then they have "Intel Xeon" with 256K cache and 400fsb in 1.5 to
2.0GHz speeds. I guess those are based on the P4 ? How they differ from a
P4 I do not know. Check out www.5oclock.com under Price Check / CPUs /
Intel Server if you're curious.
Better yet - you can now get multi-CPU AMD Athlon servers :) IBM was
supposed to be introducing them, or you can roll your own, like Shirley G.
-Wayne Cox
>1. Xeon vs. P3/P4 class processors. Most lower end servers are coming withThe Xeon has always been a plain P2 or P3 CPU core. The difference is in
>P3 chips and higher end servers with Xeons, but I see the Xeons still have
>the 100mhz bus speed and only go up to 900mhz. I will definitely be using
>dual processors.
its cache and bus. The Xeon comes in a variety of cache sizes up to 2MB,
and it runs at the full speed of the CPU core. The P2 and older P3 cache
ran at half the core speed. Celerons and later P3s ran the cache at full
core speed, but only with 128 or 256K in 'em.
The bus probably has the biggest impact on server performance. Plain
Pentiums are limited to 2 CPUS in a multi-CPU system (at least with Intel
chipsets.) And they share bandwidth on the same address and data
bus. Xeons and their chipsets can go to 8, maybe higher, CPUs, and each
one gets a dedicated bus.
One of my favorite vendors is listing P-III Xeons up to 1GHz with
133fsb. Then they have "Intel Xeon" with 256K cache and 400fsb in 1.5 to
2.0GHz speeds. I guess those are based on the P4 ? How they differ from a
P4 I do not know. Check out www.5oclock.com under Price Check / CPUs /
Intel Server if you're curious.
Better yet - you can now get multi-CPU AMD Athlon servers :) IBM was
supposed to be introducing them, or you can roll your own, like Shirley G.
-Wayne Cox