Installed memory today, questions immediately

[Chris Brennan]

 On Thu, Nov 4, 2010 at 10:35 PM, Jon Radel <jon at radel.com> wrote:

> On 11/4/10 10:13 PM, justin v wrote:
>
>>
>> I installed 4GB or memory today.  I rebooted and see this, the first line
>> after the splash menu thing:
>>
>> 983040K of memory above 4GB ignored
>>
>> dmesg shows avail mem amount and I am concerned as well:
>>
>> real memory  = 4294967296 (4096 MB)
>> avail memory = 3139940352 (2994 MB)
>>
>> is a stick bad perhaps?
>>
>>  Start by reading
> http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/faq/compatibility-memory.html
>
> If that doesn't cover it, come back here and include a little information
> about the version of FreeBSD and the hardware you're using.
>
>
Justin, where you the one who was getting weird coredumps w/ no data and
memtest86 beeped at you?

On a side note, mismatched pairs might cause this .... bank's 0-1 need to
match each other in speed/size and banks 2-3 have to match each other but
banks 0-1 don't have to match banks 2-3 ... (e.g. My desktop has 2 2GB
Modules and 2 1GB modules for a total of 6gb (in my case they are the same
speed all across (DDR2/800)

hth/chris

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> --
>
> --Jon Radel
> jon at radel.com
>
>
>