Overclocking PWS500/jumpers?

Overclocking PWS500/jumpers?

Post by thursda » Wed, 10 Dec 2003 15:36:31


To the list,

Irecently got a second PWS500a/u, this one a GL model with the USB
ports. I'd heard that the Miatas can be overclocked and decided to
try it with the older machine.

I got a list of jumper settings posted on comp.sys.dec August 15, 2002
by Marco Nuessgen. I eBayed a 533mhz cpu as a spare, it arrived today
so I decided to try o'clocking it.

I put in the 533 (it has a PC 164 heat sink on it) with the Miata heat
sink, and set the jumpers to what was supposed to be 600 mhz.

The setting I used is below:

00000101 1 being up and 0 being down, relative to the bottom of the
MoBo.

Show Config indicated the CPU was running at 533. I tried booting
Linux, the kernel got lost looking for the PCI bus. I took the CPU
out. It was pretty warm, considering it had been running a few minutes
under light load.

I put the old CPU in with heat sink. It ran a lot cooler but still
would only go 533. I didn't bother trying to boot, alhtough I bet I
could've got Windows 2000 to come up off ARC.

I noticed that the little silver heat transfer sheet, which had never
melted under the 500 cpu in 5 years of active use, had fused to the
new 533 CPU.

Marco's post showed the following jumper settings

433 01011001
500 01111001
600 00000101

does anyone know if these are right? If so, are my CPUs somehow
internally limited for clock speed?

Unlike on a PC, changing the CPU frequency on the Miata seems to
change some IRqs as well as PCI and memory frequencies. So I guess a
successful overclock means some pretty serious reworking of my Linux &
Tru64 OSes, maybe even a rip-out and re-install?

Well, has anyone else tried this? How did it go?

Thanx

jn
 
 
 

Overclocking PWS500/jumpers?

Post by gl : » Thu, 11 Dec 2003 05:42:21

Il Mon, 08 Dec 2003 22:36:31 -0800, jon_norstog ha scritto:


Nonsense on a workstation.
Let kids overclock their peecees :)

Bye!
gl :)

 
 
 

Overclocking PWS500/jumpers?

Post by thursda » Thu, 11 Dec 2003 08:55:39

is is a followup to my own msg.

A search of the XXXX@XXXXX.COM arhcives found the following from
1999:

*******************************************************************************
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 ...

**********************************************************************

So I guess I'll try some of those settings.

later

jn



XXXX@XXXXX.COM (jon_norstog) wrote in message news:< XXXX@XXXXX.COM >...
 
 
 

Overclocking PWS500/jumpers?

Post by thursda » Fri, 12 Dec 2003 03:38:26

Follow-up:

I used the 600 mhz setting in the left-hand column below with my $20
eBay CPU. SRM recognized the CPU as 600mhz. Unlike 533mhz, the
machine booted RedhAT 7.2 without hesitation. AlphaBios took some
time reconfiguring, after which W2K came up in its usual clunky way.

The improvement in speed was noticeable, with no stability problems
under either OS. The CPU was good and warm, maybe 125-130 F- same
temp as it ran at its rated 533.

I will run it a monhth and maybe post an update.

jn
 
 
 

Overclocking PWS500/jumpers?

Post by Matt Simi » Sat, 13 Dec 2003 21:02:22


Ive been running my 21164 533MHz (on a Ruffian board) at 633MHz for several
months, no problems to report. I changed the stock fan to a more meaty (tho
unfortunately noisy) model. It should also be noted, I dont do anything
"important" on this machine!

It will post at 667 but crashes shortly after post.


Matt
 
 
 

Overclocking PWS500/jumpers?

Post by hectormcdo » Thu, 18 Dec 2003 15:27:18


ARE YOU A CHILD ABUSING BASTARD?
 
 
 

Overclocking PWS500/jumpers?

Post by Jafir Elku » Thu, 18 Dec 2003 22:49:55

> > Nonsense on a workstation.

Are you a crack smoker?
 
 
 

Overclocking PWS500/jumpers?

Post by hectormcdo » Mon, 22 Dec 2003 14:20:14


yes, and also *** and speed