[SunRescue] Loads

[nick at ns.snowman.net]

Bridgepoint started manufacturing alot of the old ross hypersparcs, and
they make .25, .5 and 1meg versions of most.
	Nick

On Thu, 9 Mar 2000, Gregory Leblanc wrote:

> > -----Original Message-----
> > From: koch at pz.pirmasens.de [mailto:koch at pz.pirmasens.de]
> > Sent: Thursday, March 09, 2000 2:22 AM
> > To: rescue at sunhelp.org
> > Subject: Re: [SunRescue] Loads
> > 
> > 
> > Hi!
> > 
> > >Uhm, a SS20 will easily support up to 200Mhz HyperSPARC CPUs
> > >with the right OpenBoot PROMs.
> > 
> > Four of them??? Surely not!
> 
> Sure, you just plug them in, and add 250 extra cooling fans, and off you go.
> Assuming that you can find the dual 200MHz HyperSPARC boards, that is.
> 
> > You can plug in two 200 (225???) MHz cpus, but that would not
> > gain much compared to the four 95 MHz cpus. I'd even say the
> > four cpus are better cause it's harder for a single person to
> > occupy all cpu horsepower.
> 
> Never seen 225MHz, but I know that the 200MHz CPUs exist.  IIRC, ISI has
> their root server running a 670 with quad HyperSPARC 150s?  Something along
> those lines, anyway.  
> 
> > 
> > >> P.S.: Sun doesn't recommend more than 2 processors in
> > >> the SS20 that are faster than 50 MHz.=20
> > >
> > >Where'd you get this from?  And, if its true, why did Sun
> > >sell the SS20 available with SM71s, SM81s, or 150Mhz HyperSPARCs?
> > 
> > They never sold any machine with four SM-61 or faster. The
> > only four CPU configuration that sun supported ever was the
> > SS20-514, e.g. two 50 MHz dual cpu modules with 1MB supercache
> > each. The reason was simple: Four 60 MHZ (or faster) would
> > clog the M-Bus and run slower than four 50 MHz cpus.
> 
> Possibly, that depends on use.  If you have an application that's dealing
> with small datasets, you'll see a pretty big speedup going to multiple,
> faster CPUS (say, quad 150MHz hypers).  For typical workstation use, you
> could probably saturate the MBUS.
> 
> > 
> > Notice that the Hypersparc have only 256 kb cache...
> 
> Some of them have only 256K, some have 512K.  I'm not sure, but I thought
> that I'd seen some of the ones that they're manufacturing now with 1MB, but
> I can't find that reference again.
> 	Greg
> 
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