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Doesn't recognise new memory modules

\015 I have just installed 2x2gb memory modules in my Acer Aspire SA90. It is supposed to support up to 4gb, but it still says only 2gb are installed. Have I misunderstood what I read and wasted my money. Thanks. Sylvia.\015

Answers :

Try this;

Install only one memory module at a time then check how much memory it will recognized. If it say 1 gb may be somehow the module is mislabel for the correct capacity. Then contact the seller for clarification.
Make sure you have installed it correctly\015\012the memory banks (slots) are paired \015\0121 with 2 and 3 with 4 (they should have matching colors)
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