Re: R10000-150mHz_vs_R12000-300mHz...(?)

From: Tony 'Nicoya' Mantler (nicoya_at_ubb.ca)
Date: 03/19/05 

Date: Sat, 19 Mar 2005 18:53:03 GMT

In article <190320051742498187%arsche@xs4all.nl>,
 arie van schutterhoef <arsche@xs4all.nl> wrote:

: > The overall system design differences between the O2 and the Octane
: > may mean that you won't be able to get quite as much out of your O2
: > as Olaf does on his Octane with an identical CPU.
: -The question is probably more or whether the o2's UMA makes
: a difference in comparison to the Octane's switch. In particular
: when the system contains two cpu's.
: Also secondary cache will influence the outcome.

The point that was trying to be made is that the R10k O2s are essentially a
graft job, and the CPU performance suffers because of it even when the rest of
the system isn't anywhere near its limits.

You can read Ian's CPU performance tables for examples showing how the FP
performance especially is completely neutered in the R10k O2 compared to the
exact same CPU in the Octane or even the Indigo2:

<http://www.futuretech.blinkenlights.nl/r10kcomp.html>
<http://www.futuretech.blinkenlights.nl/r10k250comp.html>

If you don't use the UMA features in the O2 then you're *much* better off with
an Octane.

Cheers - Tony 'Nicoya' Mantler :) 

-- 
Tony 'Nicoya' Mantler -- Master of Code-fu -- nicoya@ubb.ca
--  http://nicoya.feline.pp.se/  --  http://www.ubb.ca/  --

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