The Yamaha AN1x Synthesizer mailing list

hi bruce,

i checked the motherboad (ms-6309) manual and it said
it supports a maxium memory size of 1.5gb (32mx8).

it's weird. each ram module is fine and the exact
same. the ram slots all work but i can't use two
modules of ram at the same time.

thanks for the reply,

elektro dan.


--- Bruce Wahler <bruce@...> wrote:
> Dan,
> 
> It sounds like your motherboard cannot support more
> than 256MB of RAM.  The fact that you have the
> latest BIOS is great, but that cannot eliminate
> hardware incompatibilities.  For example, I have a
> motherboard with two slots, filled with 512MB SDRAM
> DIMMs.  Even though there are now 1MB SDRAM DIMMs on
> the market, I cannot use them, because the hardware
> configuration cannot address 1MB DIMMs, period.
> 
> To try to explain, without getting overly technical:
>  Each DIMM module has a number of signals coming to
> it to address the individual bytes of data in a
> row/column method.  Each of these signals if
> connected to hardware in your chipset that keeps
> track of the memory being used, and the next
> location to be accessed.  Depending on the memory
> used, the external signals may be used for different
> purposes.  If I had to venture a guess, your PC has
> enough external signals/chipset hardware to address
> a 256MB DIMM, but only enough internal/external
> hardware to support 256MB of memory.  This is why
> you can use 2 x 128MB or 1 x 256MB, but 2 x 256MB
> will not work.  In a perfect world, the BIOS would
> compensate for this -- or at least, tell you that
> the memory configuration was wrong -- but it's
> difficult to support many different sizes of memory
> and detect wrong combinations, too.
> 
> If you really want 512MB of RAM, you need a new
> motherboard.  :^(
> 
> Regards,
> 
> -BW
> 
> --
> Bruce Wahler
> Ashby Solutions\ufffd   http://music.ashbysolutions.com
> CloneWheel Support Group moderator
> 978.386.7389  voice/fax
> bruce@...
> 
> 


=====
============================
           DAN C.

      Toronto, Canada  

email> elektro_dan@...
============================

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