So I bought 16GB of LPX ram to go along with my already installed 16GB and I noticed a slight difference in part number.. CMK16GX4M2B3200C16 vs CMK16GX4M2D3200C16. I looked them both up and the timings are slightly different. One being 16-18-18-36 and the other 16-19-19-36. Is this going to be an issue? I have not installed the new sticks yet and can still return them if I need to.. I'd rather not though. Thanks for any insight.