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Why I can not use full 8GB memory?


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I have 2 sticks of Corsair Vengeance DDR 3 Memory (CMZ4GX3M1A1600C9)(Each 4 GB) I have Windows 7 Ultimate x64 operating system.When I look at the system specs it shows as




Why this is happening


I want to know that why I can not use full capacity of the memory i.e. 8GB

I have another PC with G.Skilll RAM (16GB ) do not have above problem,that PC is utilizing full 16 GB RAM


Some people (at Yahoo Answers)told me that your on board graphics might be eating 0.5 GB memory so try using Discrete graphics card so I borrowed AMD 5450 GFX card from my friend for few days & tested it but still there was no change


What Can I do so that I can use full memory benefit that I have installed


The System specs are


CPU:-AMD Athlon X2 260


Mobo:-Asus M5A88-M


Memory:-Corsair Vengeance 2x4 GB


PSU:- Corsair CX430 430W


Note two sticks purchased separately but having same model & timing

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