The two Samsung modules should not give you  any problems and, if they 
are a match, you will get a minor performance benefit from them. If not 
matched, you really will not miss it as the CPU, in your system, has 
more of an effect on performance than matched memory.

Check your motherboard manual to make sure that matched memory is 
automatically sensed. With the multitude of motherboards, you might have 
to manually set a jumper on your MB or change a setting in your BIOS. If 
there is a manual setting, I would start without a matched memory 
configuration to assure myself that the memory worked OK. Then I would 
try setting it for matched memory and see if there were any problems and 
see if matched memory is acknowledged.

I hope this helps. If there is a problem, you can return the memory to 
the present configuration and post again.

Tom Mayer

Ron Smith wrote:
> Hello
> I wish to upgrade the memory on my computer from 256 Mb to 512Mb, as Everest tells me it needs more systems memory to improve performance. The Crucial systems scanner says the maximum capacity is 512Mb, and that the memory is pc2700.
>
> The motherboard has two DDR DIMM RAM slots (ECS 741 GX-M) and an AMD sempron 900MHz processor, with WindowsXP.
>
> But I have been told that if two of the same memory modules are used in Dual Channel mode, problems can arise when the two MM's are not properly matched by the Manufacturer. I have two Samsung pc2700 256Mb DDR memory modules; can I replace the existing module with these and expect to be problem-free? Or just put one in the empty slot? And, what disadvantage would follow if Dual Mode were not adopted?
> Thanks in advance,
> Ron
>
>          
>
>
>   

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