[G4] J21 vs. J24 for empty DIMM slot in G4-450 AGP

[Sean]

CL2 is faster than CL3 for memory access. I would put your ram in the J21 
slot. If you are having problems with it make sure you have the firmware 
patch from like 3 years ago installed. 

Honestly unless it starts acting flaky I wouldnt worry about it. 

I have PC133 CL2 in mine but that is only because it was like 5 bucks more 
and i only paid ~50/stick for 512M..



On Wed, 16 Jul 2003, Richard Kriss wrote:

> For reasons I don't understand a PC user wanted to trade me his PC-133 256K
> DIMM for two of my PC-100 128K DIMMs.  Sounded good to me and we swapped.
> My G4-450 AGP accepts either PC 100 or 133.
> 
> Before the swap I had the G4 configured:
> 
> DIMM1/J21 SDRAM 128 MB
> DIMM2/J22 SDRAM 256 MB
> DIMM3/J23 SDRAM 256 MB
> DIMM4/J24 SDRAM 128 MB
> 
> After the swap I have the G4 configured:
> 
> DIMM0/J21     =     empty
> DIMM1/J22 SDRAM 256 MB
> DIMM2/J23 SDRAM 256 MB
> DIMM3/J24 SDRAM 256 MB
> 
> Should I have left J24 empty rather than J21 or does it really matter?  It
> seems to work okay and the DIMM first aid says everything is Okay.
> 
> I'll probably get another 256 or 512 to fill up the G4-450 sometime soon.
> 
> When I ran the DIMM First Aid (that only runs under OS9), it said one of my
> old PC-133 DIMMS was okay but added a note that CL2 not supported. What does
> 'CL2 not supported' mean?
> 
> Dick
> 
> 
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