The quickest way to find out what your motherboard manufacturer, like ryder said, is to READ your manual for your motherboard.
I actually did just that for your motherboard, your MSI P965 Platinum, and just like on many Gigabyte boards, color means nothing. On your board, according to the board's user's manual in Chapter 2, page 7, headed Hardware Setup, subheading Memory (who'd have thought they'd actually hide the information under something as obtuse at that?), Dual-Channel: Channel A in GREEN; Channel B in ORANGE....and that means you put one stick in a green slot, either slot 1 or slot 2, and then your matching stick in an orange slot, either slot 3 or slot 4, depending upon whether you are using slot #1 or slot #2 in the green.
So, if you use green slot #1, use orange #3 (counting from the top green slot downward)...or if you are using green slot #2, use orange slot #4 for dual channel function.
Putting your ram into both green slots or both orange slots does
not give you dual channel function on your particular board, despite what cpu-z is telling you.
Follow the link below to download your user's manual, since you seem to not have one:
(I figure if you did have a user's manual for your board, you'd already know the answer to your question about RAM and slot population.)
http://global.msi.com.tw/index...incat_no=1&prod_no=266