[G4] Memory Mixing Problems (pc100 & pc133)

[Kevin Avery]

You have to look at these types of problems systematically, first
thing I would suspect is the new DIMM. I would pull all the other RAM
out and put the new one in the first slot and run the machine for a
while just to verify that it is good. Then I would add one DIMM of the
128s at a time and run the machine for a while in between each change.

Good luck,

take care,
Kevin Avery


On Wed, 5 Jan 2005 12:01:55 -0700, Casey Coulon <2AzBoys at cox.net> wrote:
> Hello everyone,
> 
> I am trying to add additional memory to my G4 450 AGP. I have 3 128mb
> pc100 chips installed and am trying to add a 512mb pc133. I placed the
> new 512 in the 4th slot (DIMM3/J24) when I tried it. System ran fine
> for about 2 hours after installation, then programs began to crash at
> random. After a restart, the entire system started locking up and I had
> to use the reset button each time to restart. I finally pulled the
> chip, repaired permissions and now everything is fine once again.
> 
> I looked on the G4 forum and several other people have mixed memory
> (both pc100 and pc133) and they work great. Apple web site says to use
> only pc100 on a G4 450 AGP, but other web sites say its ok to use
> pc133. Any ideas? Thanks for your help.
> 
> Here is my G4's info:
> 
>   System Version:              Mac OS X 10.3.7 (7S215)
>   Kernel Version:              Darwin 7.7.0
>   Machine Model:               Power Mac G4 (AGP graphics)
>   CPU Type:                    PowerPC G4  (2.8)
>   Number Of CPUs:              1
>   CPU Speed:                   450 MHz
>   L2 Cache (per CPU):          1 MB
>   Memory:                              384 MB
>   Bus Speed:                   100 MHz
>   Boot ROM Version:            4.2.8f1
> 
> Details on currently installed memory:
> 
> DIMM0/J21:
>   Size:        128 MB
>   Type:        SDRAM
>   Speed:       PC100-322S
> 
> DIMM1/J22:
>   Size:        128 MB
>   Type:        SDRAM
>   Speed:       PC100-333S
> 
> DIMM2/J23:
>   Size:        128 MB
>   Type:        SDRAM
>   Speed:       PC100-333S
> 
> DIMM3/J24:
>   Size:        Empty
>   Type:        Empty
>   Speed:       Empty
> 
> Thanks again.
> 
> Casey
> -----
> Choices.  Decisions.  Consequences.
> Take responsibility for your actions.
> 
> Contact:
> 2AzBoys at cox.net
> 
> 
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