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My 4GB only recognised as 2GB


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Hi all


Recently my computer just went off, and I managed to bring it back to life by replacing the motherboard.


However, the RAM can not be recognised correctly. I have 4 2x2GB Corsair DDR3 RAM, CMX4GX3M2A1600C9, so I expect to have 16GB, but both BIOS and windows only see 8GB. The motherboad is Asus M5A78L-M/USB3, so it should support this RAM.


The computer is running 64-bit windows 7.













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Thanks for your reply.


I am getting a little confused, I think this RAM itself is 4GB (because it is 2x2GB), it is a 240 pin DIMM packaging, that's why if I insert 4 of them on board, I should have 16GB in total.


By the way, this is the motherboard I used before

https://www.msi.com/Motherboard/890GXMG65.html#hero-specification ,

So would this show 16GB? If so, what makes the difference please?

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Each module is 2 GB, not 4 GB. The TOTAL CMX4GX3M2A1600C9 kit is 4 GB. It is a 4 GB kit comprised of TWO 2 GB sticks.


So with TWO CMX4GX3M2A1600C9 kits you have FOUR 2 GB sticks.


Slot 1 = 2 GB

Slot 2 = 2 GB

Slot 3 = 2 GB

Slot 4 = 2 GB



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