amd64: Fatal Trap 12 in high load situations

ms80 ms80 at
Sat Feb 6 11:18:34 UTC 2010

Am Saturday 06 February 2010 11:38:25 schrob Michael Powell:
> ms80 wrote:
> > Hi
> >
> > I have a problem installing / upgrading FreeBSD 8.0-release on a new
> > machine.
> >
> > The computers specs are:
> >
> > cpu: AMD Phenom II X4
> > board: Gigabyte MA790GPT-UD3H
> > ram: 4x2GBytes DDR3/1333
> > hdd: 2xMaxtor STM31000528AS
> > nic: 4x Intel(R) PRO/1000
> [snip]
> > So here are my questions:
> > 1. Are there any known caveats or quirks regarding my hardware?
> > 2. What can I do to further investigate this issue
> > 3. Not fully on topic but might be related: The buildsystem recognizes my
> > cpu as "686 class cpu" wich is wrong. Are there any switches I can set in
> > make.conf to have 'make' use the correct values? Currently I'm using a
> > blank make.conf, meaning it is not present (as it is by default on a
> > fresh installed system).
> [snip]

[snip too]

> I believe your problem centers around memory. It may not be designed for
>  AM3 socket and/or may not be able to handle a higher memory multiplier.
>  When I first put this motherboard in I attempted to boot from an already
>  installed OS with the memory multiplier set too high and saw numerous
>  examples similar to what you are describing. Since I had bought 1600MHz
>  memory I mistakenly set the multiplier too high. When I set it back to
>  1333MHz everything was fine. Either the memory multiplier is set too high
>  for your RAM or it is just the wrong RAM to begin with.
> As far as make.conf goes I use: CPUTYPE?= k8
> -Mike


Thank you for your reply.
I'm using two of this: OCZ3P1333LVAM4GK  
(OCZ DDR3 AMD Edition, rated for 1333MHz at 1.65V). My Board is rated for 1066 
- 1600 MHz memory, and neither the website nor the manual say anything about 
limitations with memory. Anyway: I didn't overclock cpu or memory. I have 
stability and long life in mind, so I try to keep the hardware cool. During 
testing I underclocked the memory with 1066 and 800 MHz which didn't help: The 
machine crashes anyway. The only thing to note is that by default the board 
tries to set 1.5V DDR3 Voltage which is wrong, you have to set it to 1.65V 

A faulty piece of hardware was the first thing I suspected and I tested among 
other things the memory with memtest86+. This runs fine for 4 passes, without 
any error. As far as I can tell, my memory subsystem is ok.

As for make.conf: thanks, I will set this when I try again.

with best regards



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