Memory size in task manager changed

[bluetech]

After I connected my ram the first time I saw in windows 10 task manager 16GB now it says I have 8GB but the weird thing in the right side of the display in the performance tab directly 2 or so inches to the right of the bold memory woed it says 16.0 GB DDR3. Is this considered dual channel? I have 2 8GB sticks placed in slot 1 and 3 BTW.

My motherboard is the Gigabyte GA-990FXA-UD3 (rev. 3.0)

Here is a screenshot.

 

[Burpo]

You haven't said what motherboard you have, but I suspect it can only read 4Gb sticks & it cuts off addressing the extra 4Gb offered by each module, resulting in only 8Gb being addressable.

 

[Ken g6]

Are you sure both sticks are seated correctly? You have to push them down until they click on both ends.

Edit: @Burpo:

Mobo: Gigabyte GA-990FXA-UD3 (rev. 3.0)

 

[bluetech]

I will check to see if there are both inserted correctly.

 

[Burpo]

Ok, board supports 8Gb sticks, but are you running 32 bit Windows? That will also prevent it from being addressable.

"4 x 1.5V DDR3 DIMM sockets supporting up to 32 GB of system memory (Note 1)"

(Note 1) Due to a Windows 32-bit operating system limitation, when more than 4 GB of physical memory is installed, the actual memory size displayed will be less than the size of the physical memory installed.

 

[bluetech]

Turns out the ram was not properly installed. Some things just do not click in my brain i.e. checking if the ram is installed correctly.