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Old 6th May 2008
nikkon nikkon is offline
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Default RAM issue

hello people,
i just install freebsd 7 on my home pc and i have a small issue with my ram.
I have 3GB of ram (2x 1gb and 2x512) and my system can see barely 2GB of ram.

Any ideas how to fix it?
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Old 6th May 2008
chavez243 chavez243 is offline
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Default get MemTestx86

get Memtest and verify your memory is properly installed / detected and functioning.
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Old 6th May 2008
nikkon nikkon is offline
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my memory is ok i already test it with memtest and until now i run on my machine centos5 and no problems with ram.
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Old 6th May 2008
FloridaBSD FloridaBSD is offline
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As I have been told by many other fellow users on daemonmforums and linux questions You needa 674bit kernel in order to have you machine properly recognize more than about 2.75gb of memory.
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Old 6th May 2008
DrJ DrJ is offline
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Quote:
Originally Posted by FloridaBSD View Post
You needa 674bit kernel in order to have you machine properly recognize more than about 2.75gb of memory.
Nonsense. I have 3GB installed, and all are recognized.
Code:
pinot% dmesg | grep emor
real memory  = 3220701184 (3071 MB)
avail memory = 3141808128 (2996 MB)
Depending on the video card you have installed, the 32-bit version sees about 3.5GB memory.
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Old 7th May 2008
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phoenix phoenix is offline
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Quote:
Originally Posted by FloridaBSD View Post
As I have been told by many other fellow users on daemonmforums and linux questions You needa 674bit kernel in order to have you machine properly recognize more than about 2.75gb of memory.
You need a 64-bit OS in order to address more than 4 GB of RAM.

A PAE-enabled kernel can access more than 4 GB of RAM, but only in 4 GB chunks (ie, each process only sees 4 GB RAM, but you can run multiple processes each with their own 4 GB).

A 32-bit OS, however, will not be able to address all RAM if you have 4 GB. Depending on the motherboard and CPU, between 256 MB and 1024 MB will be "reserved" for PCI devices. Some AMD motherboard (don't know about Intel) will allow you to re-map the RAM above the 4 GB line (making it look like you have up to 5 GB of RAM, with 4 GB usable) but not all devices play nicely with that.
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