Why my memory sticks read 4GB instead of 6GB?

[NUCLEAR_SUBSTANCE]

Hi all,

I'd like to ask why my RAM only reads 4GB instead of 6GB? It is Corsair Dominator Triple Channel memory. My system specs are as follows:

CPU: i7-965
Mobo: Gigabyte EX58-UD5
RAM: Corsair Dominator 6GB triple channel CM3X2G1800C8D XMS3-1800 8-8-8-24 1.80V

I put the memory sticks in different slots, many different combinations, even removing the dedicated RAM cooler, but still only reads 4GB. Could it be a BIOS issue or dead memory stick?

Here's a link to the picture of my RAM. They're 2GB each, a total of three sticks.

https://www.dropbox.com/s/lg1v3ijdp7n2qb6/IMG_20170706_215507865.jpg?dl=0

Thanks for your time.

 

[Colif]

Try running the free version of memtest86 on the sticks, 1 at a time. Any errors are too many and could show you why its not responding. It creates a bootable USB so don't need to run it from windows.

If all 3 sticks come out as fine, check the slots as well

 

[NUCLEAR_SUBSTANCE]

Try running the free version of memtest86 on the sticks, 1 at a time. Any errors are too many and could show you why its not responding. It creates a bootable USB so don't need to run it from windows.

If all 3 sticks come out as fine, check the slots as well

Oh, I see. Thanks for the help!

 

[Lkaos]

Where are you getting that information? In Windows? You probably have 32 bit version....

 

[NUCLEAR_SUBSTANCE]

Where are you getting that information? In Windows? You probably have 32 bit version....

I've always used 64-bit Windows 7. It reads 4GB in the BIOS and applications like CPU-Z.