[Suns-at-Home] 450MHz CPUs and U60

[Craig Dewick]

On Sun, 3 Jun 2007, Robert Reif wrote:

> I have a Netra T 1125 and an considering replacing the 300 MHz
> cpus with 450s.  Sun lists 7 different 450s for the U60.  Are they
> all the same or are some better then others?

They're all slightly different which is why they have different 501-xxxx 
numbers, even though all the 450's which work in U60's and u60-based 
derivatives (T1125, etc.) are allocated the x1195a option code.

If you check out the System Handbook you'll see what I mean:

http://www.sunshack.org/data/sh/2.1/infoserver.central/data/syshbk/Devices/CPU_Module/UltraSPARC_450MHz_UltraII.html

It's generally not a good idea to combine CPU's of the same speed but 
different part numbers because the differences in the ASIC's, etc. can 
trigger kernel panics, and all sorts of other unusual problems if 
something trips up. Even though the x-number is the same, sticking to 
identical 501-xxxx numbers gives the best reliability.

Regards,

Craig.

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