RE: PWS 500 a/u overclocking - followup

["Jon Norstog" <jnorstog shoshonebannocktribes com>]

To the list:

Follow-up:

Well, the problem was that Marco's jumper setting for 600 mhz was actually
for 533. I found another post with more settings.

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.  Tru64
booted up but only to single user mode. I'm not certain if that is because
of the  change in clock speed or something else.

The improvement in speed was noticeable, with no stability problems
under either Linux or Windows.  The CPU was good and warm, maybe 12o-125 F-
roughly the same temp as it ran at its rated 533.  I haven't tried this with
the original CPU, which ran much cooler in the 533 mhz test.

I will run it a month and see what happens.  My thought next was to put in
the EV56 kernel and library updates and see if they help performance.



jn


>
> 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
>
>
> 433 -> 0101 1001 -> 1001 1010 -> 0101 1001 - PWS 433a
> 500 -> 0111 1001 -> 1001 1110 -> 0111 1001 - PWS 500a - orig system
> 533 ->           -> 1010 0000 -> 0000 0101 - PWS 533a :)
> 600 ->           -> 1010 0100 -> 0010 0101 - stalled on boot