Overclocking a Crimson? (Was: RE: [geeks] OK success almost)

[Corda Albert J DLVA]

> -----Original Message-----
> From: Big Endian [mailto:bigendian at mac.com]
> Sent: Friday, March 22, 2002 6:15 PM
> To: geeks at sunhelp.org
> Subject: Re: [geeks] OK success almost
> 
> 
> >I think the first thing I usually grab is bash.... so what is the 
> >main architecture family called for the IP17 machines?  i.e. what 
> >irix stuff will run unmodified on 6.2
> 
> Most IRIX 6.2 binaries are built for MIPS3, so unless it explicitly 
> says "needs R5k/R10k (MIPS4 Instruction set)" it will work.  The 
> freeware is all built for MIPS3
> 
> >>>
> >>>also... isn't the Crimson a 64 bit machine?  I was wondering why 
> >>>running file on many of the files yields 32 bit programs... can 
> >>>they be changed?... and why of course does the default install 
> >>>install only 32 bit stuff?
> >>
> >>Irix 6.2 also runs on Indys, which are 32 bit, even though the cpu 
> >>can be 64.  Its evil but thats the way it is.  Unless you go R10k 
> >>it won't be pure 64bit.
> >>
> >You can't put an R10000 in a Crimson can you? err into an IP17 board?
> 
> Hell no.  You need a challenge/onyx/I2 class machine or an 
> O2/Octane/Onyx2/Origin class.  You'll need other hardware to do R10k. 
> Not that it matters much, the crimson is a *BAD ASS* machine, 
> especially with RE or VGXT graphics.

I've always been tempted to try overclocking the CPU in a Crimson...
has anyone here ever tried fiddling with it? I know that you can
upgrade a 100Mhz to a 150 Mhz,
(see http://www.gisparks.tas.gov.au/sgi/r4400/r4400board.html )
This would would indicate to me that the CPU subsystem is clocked
independently from the other subsystems on the CPU board (a
technique that SGI used on a number of their systems).
It might be possible to boost the clock of a 150 up
to 180 or 200 Mhz (Although I'd be tempted to hack in a cooling
fan on the CPU heat sink :-)
 

-al-
-acorda at 1bigred.com
 


> 
> daniel
> -- 
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