I've just upgraded my pismo with a powerlogix g3 900mhz processor.It seems as though the heatsink is not seated properly on the CPU itself or may be loose. I would remove the
There are heat issues. The fan comes on and it did not with the original
500mhz processor.
daughter card, remove the heatsink pad and clean both the CPU and heatsink surfaces again. Make sure they
had removed the old heat transfer tape. Use isopropyl to clean both surfaces. Once clean apply some fresh
thermal paste per the instructions given with the thermal paste. Align and place the 2 screws back in. Torque
to approx. 5-7 ft-lbs of pressure.
More important are the following two matters:
My pismo reports that there is a problem with cache memory. Any ideas about
the source of this? The powerlogix processor comes with a .5mb cache. The
original pismo had a 1 mb cache. Is my pismo confused because of this?
Is the source of reported problem referring to the L2 or L3 cache problem?
The L2 is .5mb and is located on the cpu die. The original L2 cache which
is on the board itself now revert to becoming L3 cache. The system may
be confused this fact and not initialize properly. There is a cache setting
utility "cpudirector" from powerlogix which can be had here:
http://www.powerlogix.com/support2/cpudirector/index.html
After checking the heatsink and reassembling everything I would drop the
cpu speed and disable the L3 cache and see what happens with respect
to the temperature and if you still get the cache error. If everyhting seems OK
I would increase the CPU speed until you achieve the full 900MHz. If the fan
doesn't turn back chances are you may have solved the problem.
Hmmm... The only thing I can think of right now is, make certain that theI've lost the use of my firewire and USB ports. Any conjectures on what could have happened and what could be done?
cpu daughter card itself is seated properly. i.e the 2 left side tabs are matched up
in the slots and the daughter card itself is bottomed onto the main logic board connector.
Since the Firewire and USB bridge path comes from the UNI-N chip located on the under side
of the daughter card itself, I would also make certain that none of the pins on the daughter
card mating connector or logic card mating connector did not get inadvertantly bent
or crunched.
Good luck, hope this helps some.
Jack
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