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I have a very old laptop... TMP246-M-3525 with the specs with Intel Core i3-5005U 2GHz, and 4GB DDR3L-SDRAM running windows 8.1 Pro... i have inserted an additional ram (2GB got it from an old Sony VAIO Laptop)... in the task manager it only detects 4GB but in CPU-Z it says 6GB... how would i know that the ram is working or its not? see attached photo for reference...
[Thread was edited to include the topic issue]