HOW TO IDENTIFY THE SIZE OF RAM

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hi all
Could someone please tell me how does the BIOS in the PC identify
the size of the installed RAM during POST

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Archived from groups: alt.comp.periphs.mainboard (More info?)

Serial Presence Detect (SPD) is a small EEPROM mounted on the DIMM that contains information about the DIMM module's size, data width, speed, voltage, etc.
The Serial Presence Detect helps the system bios identify the memory as the correct type and properly configure the memory.

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"Viveksheel" <UseLinkToEmail@HardwareForumz.com> wrote in message news:7_286714_a377ad162f7eda6ee05f48ace50e2178@hardwareforumz.com...
> hi all
> Could someone please tell me how does the BIOS in the PC identify
> the size of the installed RAM during POST
>
> --
> Posted using the http://www.hardwareforumz.com interface, at author's request
> Articles individually checked for conformance to usenet standards
> Topic URL: http://www.hardwareforumz.com/General-Discussion-IDENTIFY-SIZE-RAM-ftopict57036.html
> Visit Topic URL to contact author (reg. req'd). Report abuse: http://www.hardwareforumz.com/eform.php?p=286714

 

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Archived from groups: alt.comp.periphs.mainboard (More info?)

On Mon, 06 Jun 2005 14:39:00 -0400, Viveksheel wrote:

> Could someone please tell me how does the BIOS in the PC identify
> the size of the installed RAM during POST

They may use the SPD data now, I'm not sure, but before that it was simply
write to segments and see if it was there. At least that what I did to
determine memtop on pre PC machines.

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