Question about AOpen MK79G-N (91.8B110.101) Motherboard

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RAM compatibility with MK79G motherboard

I have bought 1Gb of RAM (DDR 333 PC2700 184 pin) for my MK79G motherboard but it does not seem to be recognised by the motherboard. I have tried taking out the 256Mb memory currently installed and slotting hte new memory in the first memory slot but the machine gives out an intermittent beep when switching on and will not boot. Putting both the 245Mb and the 1Gb memory in together allows the machine to work but only recognising 256Mb.

From my limited technical knowledge I think I have got the correct RAM but I am unclear why it is not recognised by the motherboard - are you able to advise me please?

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  • keefmorgan Feb 16, 2009

    Thanks for your response.



    THe original memory was 256mb ddr pc2700 / 333mhz. THe new piece of memory I got was also 333 mhz. I tried using just the new module I bought without the original memory (tried in both slots) but the machine didn't boot at all. I can only presume I have got the wrong memory module or one that is not compatible with the MK79G motherboard?



    I found the following description on the Fixya website which has an on-line manual:

    With NVIDIA nForce2-G/GT chipsets, the MK79G-N / MK79G-1394 can support Double-Data-Rate (DDR) RAM. The DDR RAM interface allows zero wait state bursting between the SDRAM and the data buffers at 400/333/266/200 MHz. The four banks of DDR RAM can be composed of an arbitrary mixture of 64, 128, 256, 512MB or 1GB DDR RAM and maximum up to 2GB. The MK79G-N / MK79G-1394 allows DDR RAM to run at either synchronous or pseudo-synchronous mode with the host CPU bus frequency (400/333/266/200MHz) (When enabling VGA onboard, memory can run max. up to 333MHz).


    This seems to suggest that memory with different sizes can be mixed but it also mentions 'four banks' and i'm pretty sure there are only 2.
    THe rest of it doesn't make a lot of sense to me.


    Does the make of the memory affect its compatibility? Is it possible I have bought the right specification of memory but that it just isn't compatible?
    I suppose the other option is that the memory is malfunctioning but that should be fairly unlikely I would have thought (having been careful to handle the module correctly and earth myself before handling etc.




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Hi, I am assuming that the original piece of memory was a 256mb ddr pc2700/333mhz ?
i have looked at your board on the product maker website and it supports memory to 2gb of pc2100,pc2700/pc3200 type memory. Be certain however that the new piece added is the same clock speed as the original that you are trying to use with it. You cannot mix clock speeds, either pc will not boot or it will only recognise the compatible piece. Have you tried booting with just the new piece 9 leaving out the older piece)if yes what was the result. Need more help ?? compdoctor2005@btinternet.com

Posted on Jan 03, 2009

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