I had bought this Ares 1866 RAM earlier on sale for another build I had planned though a friend of mine gave me some older components that included a Phenom II 955 BE as well as an older Asus M4A78T-E Mobo. I was wondering whether I would run into any compatibility problems? I figured it would automatically run at 1333 while still being recognizable by the older motherboard. Thought I would ask for second opinions to be sure in case I should possibly return the ram I bought for some 1600 RAM.