On Thursday, February 6, 2003, at 12:38 PM, Eric B. Haulenbeek wrote:
> Thanks Will... It looks like I may have other problems with this
> particular
> ZIF. I've tried several different CPU multipliers... 9.0 being the
> highest.,
> and all to no avail. I've also tried them in combination with several
> different system bus speeds... nothing higher than 50.0 MHz and as low
> as
> 43.5 MHz. I simply cannot get this thing to cooperate! As soon as I
> drop
> back to my old G3/266 and set it up to run at 45MHz using a multiplier
> of
> 6.0 everything is fine... what else could be wrong but the G4 ZIF?
>
> Eric
Ram is the likely problem if your G4 is good. Anyway to test it in
another machine?
When I went from the 604e 233mhz to the G3 300mhz Things were ok but as
soon as I over clocked to 350mhz I had problems. Speeds over 300mhz
starts to push the limits of the ram which came with the machine. I did
a lot of testing and found 1 or 2 8mb chips 70ns that seemed to test
bad sometimes. Removing them fixed the problem. I then upgraded to a G3
500mz Zif in the Carrier card worked fine in OS 9.x but had issues in
OSX after over clocking to 550mhz. removed the remaining old 8mb chips
and back in business. I then upgraded OSX to Jaguar. Problems again
though the machine ran fine in OS 9.1. I finally got tired of testing
ram and thought it might be motherboard or new machine time. I pulled
all the ram and took to a local ram shop that had a testing machine. To
my surprise all the ram was fine but I had been interleaving 2-16 mb
chips that looked like a pair and one was EDO and the other FPM. The
ram shop said EDO and FPM wasn't the issue but putting them together as
a pair was the issue. Sure enough replacing one of them fixed my
problems and have been running fairly trouble free for months now. They
also said speeds over 300mhz usually requires faster then 70ns ram
which was the speed when our machines were built. The odd thing was the
mixed pair ran fine in OS 9.1 and OSX 10.1.5. Your problem will likely
turn out to be something small and odd like mine. Best of luck Will S
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