Will install upgrade DDR RAM- be compatible?

I bought SODIMM PC2700 @ 512MB for the Dell Inspiron 600M laptop.
Yes, I know that is is backward compatible with the stock memory of
PC2100. However, if I remove PC2100 stick & place only  one 512MB @PC2700 stick,
will the memory be read as PC2700 (faster)?

If not, then I think I will combine the 258MB @ 2100 with the 512MB@  2700 ( the 2700 running
slower @PC2100) for total more RAM.
What do u recommend?
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It will only be faster if the mainboard supports the faster ram.  As it came with the older speed ram the answer is probably no.  As a rule more ram it better then less faster ram.
jamesg1940Author Commented:
Thank u, I should've asked if this board is flexible to accept the faster RAM. The PC is vintage 2003.
I'd ask of Dell, but that Support Site is always busy & user has to go thru hoops verifying that one is alive & well, etc. when finally online with them.
Please give me an educated guess re. that question (& I'll close this question).
I'd guess no. The specs. just stated PC2100 & that was the only upgrade for it on Dell parts.
My two desktops are latest & accept 4 different RAM speeds.

It will accept it but it wont run faster.  Put both sticks in and get 768 and you will be happy with the results.

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jamesg1940Author Commented:
thanks I thought so.
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