How i can fix this problem with my M.B and RAM?

[kiarash56]

Hello my friend
My machine's motherboard m4n78 but does not recognize more than 4 GB of RAM.
All RAM on my system are transcend.
The module are in two dual-channel (2x2Gb) and other modules (2x1Gb)
But even during boot and in Windows system information is displayed only 4 GB.
Please guide me.

 

[alexoiu]

Hi, Are you running Windows 32 or 64 bit?

 

[kiarash56]

Thank you very much for paid attention to my question.
I have windows 7 Ultimate(64-bit)

 

[alexoiu]

Do both kits work separately in both channels?