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Overclocking PWS 500 a/u followup



To the List:

I just discovered the archives, and did a search, finding the following from
1999.  I guess I'll try some of these, and then do a follow-up.


From: Mark Brown <mark complex psych adelaide edu au>
To: axp-list redhat com
Subject: Overclocking a PWS 433au ?
Date: Wed, 22 Dec 1999 10:22:51 +1030 (CST)

----------------------------------------------------------------------------
----

This machine is running as our main departmental server but is falling
sadly behind in the clock speed stakes :-( I had hoped  to try it at
500MHz.

Earlier in the year Jeff DeMaagd posted a list of settings as follows
        Known       Calculated   Calculated  Status
        Values        Values      Values

        Left to       Right       Left to
         Right       to Left       Right

CLK    MMMM MMM      MMM MMMM    MMMM MMM
RATE   6543 210N    N012 3456    6543 210N

266 ->           -> 1001 0000 -> 0000 1001 - not tested
300 ->           -> 1001 0010 -> 0100 1001 - not tested
333 ->           -> 1001 0100 -> 0010 1001 - not tested
366 ->           -> 1001 0110 -> 0110 1001 - not tested
400 ->           -> 1001 1000 -> 0001 1001 - not tested
433 -> 0101 1001 -> 1001 1010 -> 0101 1001 - PWS 433a
466 ->           -> 1001 1100 -> 0011 1001 - didn't work
500 -> 0111 1001 -> 1001 1110 -> 0111 1001 - PWS 500a - orig system
533 ->           -> 1010 0000 -> 0000 0101 - PWS 533a :)
566 ->           -> 1010 0010 -> 0100 0101 - PWS 566a ;)
600 ->           -> 1010 0100 -> 0010 0101 - stalled on boot
633 ->           -> 1010 0110 -> 0110 0101 - not tested
667 ->           -> 1010 1000 -> 0001 0101 - not tested
700 ->           -> 1010 1010 -> 0101 0101 - not tested
733 ->           -> 1010 1100 -> 0011 0101 - not tested
766 ->           -> 1010 1110 -> 0111 0101 - not tested - Kryotech? :)
800 ->           -> 1011 0000 -> 0000 1101 - get a life.  Or an XP1000.

and I have been waiting to try it out but haven't had the chance until now.
Sadly the settings don't seem to work. The existing settings for 433 are
as above but inverted - ON on the switch bank is the side away from the
processor.
I tried various related combinations but none seem to work. I am assuming
there
is no difference at this level between a 433a and a 433au - I think that is
just the boot firmware.

I get various disk noises like it might be booting but get no video
except with the original settings - a Matrox Millenium II in a PCI64 slot,
looks like the original TGA2 card will spend its entire life in a cardboard
box :-(.
I haven't been game to leave it on long enough to maybe boot and see if it
appears
on the net in case I am doing something nasty to it!

So if anyone  has any hints on what else I might try or why maybe it might
be working
but there is some reason for there being no video signal .......

Thanks,

Mark.

.. and a Merry Christmas to all ...


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