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Thread: Re: Re: Gentoo crashing?
Re: Re: Gentoo crashing?
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United States		 2007-05-15 14:32:58 

  


  

    


----- Original Message ----
From: Isidore Ducasse  ducasse.isidoregmail.com">ducasse.isidoregmail.com



Very interesting post!
Could you explain what "mobo" means?
And BTW (_almost_ off-topic...) I've heard that RAM sticks should be identical when plugged on the same motherboard, but it was some "good vendor advice" so I'd rather rely on some experienced user's answer.
So is there an issue if two RAM sticks of different brands are plugged on the same motherboard? What if, whilst of the same brand, they don't have the same capacity? Could Peter's issue be related to this kind of problem?



 


For the most part RAM sticks are identical. I have seen some issues in the past where this was not the case, but this was back in the bad old days of SIMMs. The issue I saw was where a manufacturer streamlined their design and were able to start manufacturing  sticks with 4 layer circuit boards instead of the usual 6 layers. The slightly thinner board result in occasional problems with flakey connections in RAM slots that were designed for the thicker ones.


 


I've also heard of some long term corrosion problems in RAM slots when the slot pins were of a different metal than the pins on the stick, but I've never actually seen it myself.


 


Really, the main problems you'll run into are due to different quality levels from different manufacturers. As someone else in this thread mentioned, not all manufacturers can be reliedd upon to give accurate representations of the timing settings their RAM can handle.

  

  
  
   
     
    

  

    Re:   Re: Gentoo crashing?
  


  

     user name

     2007-05-15 14:46:24
  


  

    
Peter Hoff, mused, then expounded:
> ----- Original Message ----
> From: Isidore Ducasse ducasse.isidoregmail.com
> 
> 
> Very interesting post!
> Could you explain what "mobo" means?

   mobo == motherboard

> And BTW (_almost_ off-topic...) I've heard that RAM
sticks should be identical when plugged on the same
motherboard, but it was some "good vendor advice"
so I'd rather rely on some experienced user's answer.
> So is there an issue if two RAM sticks of different
brands are plugged on the same motherboard? What if, whilst
of the same brand, they don't have the same capacity? Could
Peter's issue be related to this kind of problem?
>

I've seen a case, my own laptop - IBM X31, where it was
impossible to re-install winXP or to compile
certain programs on Gentoo because the DDR DIMMs were
unmatched.  Either ran fine by itself, but
the memory controller didn't work properly with DIMMs of
different capacities.  And there were
no bit errors reported by memtest86.

Replaced both with a matched pair, and no more problems.
 
> 
> 
> 
> I've also heard of some long term corrosion problems in
RAM slots when the slot pins were of a different metal than
the pins on the stick, but I've never actually seen it
myself.
>

This is repaired by simply removing and re-installing the
DIMMs.  The process will break up the
oxidation on the connector pins and on the fingers of the
DIMMs via the wiping action.

Bob 
-  
-- 
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