Just curious, will there be a problem if I put the mid-2015 iMac RAM (running at 1600MHz) and the late-2015 iMac RAM (running at 1833MHz) into the same computer? I have a late-2015 iMac at home, and my work has a mid-2015 iMac. I recently upgraded my iMac to 32GB, so I have two spare 2x4GB RAM. I wonder if I can simply put my spare RAM into my work computer, but I don't want to do it if it will damage the computer in any way. Any answer is appreciated.