Laptop memory expansion, over specifications

Hi,

  I currenlty own an ASUS M3000-N, with 2x256mb memory config. Asus datasheets specify that the maximum configuration is 1024mb, using 2x512mb. What I would like to know is what do you think about using:

1. 1x1024mb (like this: http://www.ec.kingston.com/ecom/configurator/PartsInfo.asp?ktcpartno=KVR266X64SC25/1G)
2. 2x1024mb (total of 2gb)

  For what I have read and been told, laptops made a few years ago weren't associated with using 1gb sodimm ddr modules because simply there weren't any available (or were far too expensive). Saying this, computer specs were limited by what was available in the market, that was 512mb. Using only 2 available slots in my computer, the maximum memory specification would automatically be 1gb of total memory.

  I would appreciate examples of this being applied successfully (on asus laptops, preferably), and of course absolute confirmation that this can/cannot be done (and why). Note that I won't accept answers stating "you can't because specifications say so", because I already know what the specs say :P ...

Thank you very much in advance
 

 
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acsevenAsked:
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nobusCommented:
>>   Asus datasheets specify that the maximum configuration is 1024mb, using 2x512mb    <<  then using other ram sticks is at your own risk.
you can check compatibility of ram and mobo at www.crucial.com or at www.kingston.com
rindiCommented:
I agree with nobus. What you can try doing is take the laptop along to a PC store and test the RAM in it first.
acsevenAuthor Commented:
Yeah, I know that I would be at my own risk. Like I said in the question, that's not the answer I'm seeking, maybe I wasn't clear, sorry ;) ... But thanks for the comments though. I already had checked both sites, and they state exactly what asus states.

What I really wanted is to know if you can find me some examples (or report your own testings, if by any chance anyone should have done something like this in the past) of laptops using (for example) 1gb sodimm when the specs don't allow it.

I already searched on the web, but didn't find anything, and I was hoping someone would. Of course I know this question is a long shot, but I had to try and see if someone knew this.

The problem with testing in a store is that most stores don't have 1gb sodimm's in stock, so they would have to import it. This of course makes the testing very difficult. I am already in contact with some stores, and we're exchanging info on this (but most of them send me to asus).

cheers ;)
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rindiCommented:
The problem is without being able to test it you won't be sure if it works or not. You'll either have to find a shop which has the memory in stock, or then make a deal with them that allows you to return the memory if it doesn't work.
PCBONEZCommented:
It has an Intel i855GM chipset which supports up to 2 GB of memory.

Just because the chipset supports it does not mean the BIOS will.
If the BIOS won't go there then neither will you.

~ Unless a BIOS revision/update addresses the issue.
~ But don't count on it.

http://support.asus.com/download/download.aspx?Type=All&model=M3N 



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acsevenAuthor Commented:
Hi,

That is good to hear (the chipset specs); I never thought of checking it ;)

Is there any way to determine the maximum memory amount that can be addressed by the BIOS?

cheers
acsevenAuthor Commented:
Hi again,

  I have found a tool (http://www.esupport.com/biosagent/index.cfm) for retrieving BIOS info, and it reports that the maximum memory installable is 3072 MB. How reliable is this? :S
PCBONEZCommented:
Reliability depends on if the source of the information. If the query to the BIOS was just a check of what chipset is installed it doesn't tell you anything new. If it checks what the BIOS can actually do then you are golden.
I don't know what the program looks at so I can't say.

In other words.
It doesn't mean more memory will definitly work.
But at least it doesn't say that it won't work.

Honestly, at first I didn't think this would fly. Now I'm not so sure.
At this point If it were mine:
I would 'borrow' some memory to find out.
I wouldn't buy any memory unless it worked.

And to your much earlier question of have I ever seen something like this work.
Yes, it was pretty common back in the 486 through P2 days for a board to support more memory than advertised.
I also remember questioning the seller of a Gateway 9150 Laptop that had memory modules in it one size larger than what Gateway specs says it will run. The seller wasn't mistaken about the module sizes and supposedly it worked fine.

PCBONEZCommented:
I dunno about that program now.
It says my max memory is 2097152 MB.
[Or 2097 GB.]
Not bad as I'm on a system with a BX chipset.

So, obviously it doesn't look at the Chipset.
PCBONEZCommented:
Here is the blurb from that programs help file:

Memory Maximum
This field identifies the maximum amount of memory that can be installed and is supported by the motherboard. This information can be helpful when deciding whether to upgrade your system with more memory. BIOS Agent attempts to identify this information through DMI built into the BIOS. Some BIOS versions, especially those dated earlier than mid 1998 may not support DMI. In addition, even if DMI is supported by the BIOS, the motherboard manufacturer may not support this field through DMI or the memory maximum amount may sometimes not be accurate or correct. If BIOS Agent is not able to detect Memory Maximum through DMI, ²Unknown² will be displayed, otherwise BIOS Agent reports whatever is memory size is reported back through DMI.

My old board probably doesn't support the DMI.
Yours probably does.

I think your propsed upgrade might work!
acsevenAuthor Commented:
Yeah, I really hope so! I have been on a quest for BIOS info tools, and now tried AMIDiag (from american megatrends, the maker of the bios) and another one (can't remember the name - i'm on another computer), and both of them analyzed the memory banks and returned 1024mb as the maximum memory module size. So dimm size is 1gb and max memory 3gb.. I might get lucky here!

I think that I am now ready to close this question, and take this info to ASUS, to see what they say. As you got me thinking on the right track, I'll award the points.

Thanks, and cheers ;)
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