memory reported less than installed

[Steven Davies-Morris]

Bill Walton wrote:
> Rashkae wrote:
>> I'm on a Gutsy 64-bit system with 3GB of memory.
>> 
>> Free:
>> 
>> Mem:       3097740    3068932      28808          0     254064
>> 1468900 -/+ buffers/cache:    1345968    1751772 Swap:
>> 3903712          0    3903712
>> 
>> System Monitor, System tab, Hardware: 3.0 GiB
>> 
> 
> IIRC, when I had 2GB installed, System Monitor reported 2GiB.  Now,
> with 10 GB installed, it's 9.7 GiB.
> 
> free reports: total             used          free          shared 
> buffers     cached Mem:      10190576     582064    9608512
> 0      17072     290696 -/+ buffers/cache:     274296    9916280 
> Swap:      6040400          0    6040400
> 
> Total / 1024 / 1024  = 9.69, so I'd say David Fox hit it on the
> head when he said "System Monitor would simply report the same
> total memory value as "free" does."  But that still doesn't explain
> where the rest went or why it's not 'taken out' when the installed
> amount is < 4GB.  I remember reading that Windows may report 3.5GB
> or something close when there's 4GB installed. I wonder if there's
> something similar going on here.  Anyway... what's 300 meg among
> friends?  ;-)  If anybody's got 4GB or more installed, it would be 
> nice to hear what you see.
> 
> Thanks to all, Bill

I'm running AMD64 on an Athalon 5200+ CPU. I currently have 4gb
installed on the board. System Monitor reports 3.8gb.
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