[LAU] question about RAM amount

Dave Phillips dlphillips at woh.rr.com
Fri Aug 1 12:45:37 EDT 2008

Forwarded to the 64 Studio devs:

Mark Knecht wrote:
> On Fri, Aug 1, 2008 at 8:12 AM, Dave Phillips <dlphillips at woh.rr.com> wrote:
>> Greetings,
>> Yet another round of upgrades here. I installed another gig of RAM in
>> each machine. The JAD box (32-bit) reads correctly at 3.1 G during the
>> boot, but the 64 Studio box reads only 3.67 G. It's supposed to be 4
>> gigs, what happened to the rest of it ?
>> Mobos are identical Gigabyte boards, CPUs are both AMD64, so the amount
>> should be supported, yes ? Video boards are also identical, with 512 MB
>> on-board memory.
>> The BIOS and dmesg yield the same report. Did I miss something ? DIMMs
>> not arranged properly, or ... ?
>> Best,
>> dp
> Dave,
>    I'e not had to do this myself as I've never had 4GB but have you
> enabled all the high memory, large memory options in the kernel? I
> believe the kernel is limited to 4GB memory ADDRESS SPACE without them
> and some of the ADDRESS SPACE is dedicated to other things in the
> system, like mapping PCI bridges, peripherals and such. However when
> you enable the larger memory models then I think that gets moved out
> of the way and you see more of your RAM.
>    Completely a guess because as I say I've never even used a machine with 4GB.
> Hope this helps,
> Mark
Thanks, Mark. I've cc'd this reply to Free at 64 Studio, he's the 
builder. I checked the kernel config, all the MEM stuff looks okay, but 
Free can say for sure.



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