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Article #2974

Re: SS-LX to SS-20 upgrade - how to modify devices, etc. + Q on CPU's

#2974
From: jason andrade
Date: Tue, 03 Nov 1998 00:00
37 lines
2552 bytes
cdewick@lios.apana.org.au (Craig Dewick) writes:

>According to the FEH, the SM-81's do not work in SS-20's. I'm trying to
>figure out the line of progression for CPU modules which are supported in
>the SS-20 (and the SS-10 for that matter). I know that it goes like this:

> SM-51 (50 MHz), SM-61 (60 MHz), SM-71 (75 MHz), ???, ???

>What comes after the SM-71 in terms of speed, processing ability, etc.? Are
>the HS11 (100 Mhz), HS21 (125 MHz) and the SM-151 (150 MHz) next along the
>increasing speed/performance curve of SS-10 and SS-20 compatibility? Are
>there any CPU modules which are faster than the 150 MHz SM-151's that will
>work in SS-20's?

>Also, what are the differences between the SuperSparc and HyperSparc
>processors apart from higher raw clock speeds?

the SM81 will work, but its unsupported due to the heat output i believe.
2 in one machine would definitely not be good, unless you have some way of
doing better cooling inside the machine.  i am still debating whether to
go for an SS20/712 or play it safe and stick with it being an SS20/612.

the hypersparc has less cache than the supersparc cpus (256K ? and then
upto 512K for the 125/150Mhz hypersparcs?).

observations i have seen is that a 150Mhz * 2 Hypersparc is comparable to
a 170Mhz Ultrasparc, but that at high loads and/or where cache is important
even the supersparc shows better performance than hypersparc

(e.g 2 * SM61 beating 4 * HS11)

-jason
--
 jason andrade       dstc pty ltd               jason@dstc.edu.au
 senior sysadmin     level 7, GPS Building 78   i just wanna be         
 phn +61-7-33654307  university of queensland   bluemisty
 fax +61-7-33654311  queensland 4072 australia  and barefooted  
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From: jason@dstc.edu.au (jason andrade)
Subject: Re: SS-LX to SS-20 upgrade - how to modify devices, etc. + Q on CPU's
Date: 1998/11/03
Message-ID: <71lmco$v0q$1@piglet.dstc.edu.au>
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Newsgroups: comp.sys.sun.hardware,aus.computers.sun,alt.sys.sun