Hi everyone, I possess a MBP late 2011. It was showing two 1333MHz 2GB RAMs correctly. Recently due to my work, I've replaced the default RAMs with 2 new Kingmax 1333MHz 4GB. Now it shows 8GB memory (in total) but only 1067MHz (each one). I wonder what the problem is and how to fix it. I highly appreciate any help and advice.