Recognizing DDR3 RAM MORE now Why??!!##$$@@ not Plug and Play??

My acer came with 4GB Ram its a little over 2 years old; Core I5b with a 500GB HD.

I added a complementary 2 GB ram DDR3 to the empty RAM slot.

Weird weird, the machine did not recognize the additional 2GB; so I switched the RAM around placing the 2GB to where the 4GB but still no change it reads 2GB rather than 4GB; my preplexion than transports me to think that both DDR's need to be of the same amount I ask "would this be a true assertment; or not? does any1 know?? I tried the chat support, but I seem to not be on their fly list, maybe cause Acer is assuming im in the market for another Acer

[edited for privacy]

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ThV5k

Hello

Did you check out if the RAM on your specific unit was upgradable? and if so that what total capacity.

Good day.

Lafl1cin

I am having the same problem with upgrading RAM on my Acer Aspire X3400. I am running Windows 7 (64 Bit) - Home Professional which is compatible up to 16GB RAM. My system came with factory installed 4 GB (8 GB Capacity) It has four memory slots with 2 GB RAM in two slots. I purchased compatible RAM - received one 4 GB memory stick. Same situation as yours..... Did you ever get this resolved? I have searched high and low on the internet and haven't found a Forum yet that can answer my question! ARRRGH!!!!!!