Depends on the mobo. Look on the manufactures web site and see if there are any compatabilty probs. Should be much of an issue with newer motherboards. Sometimes causes problems when overclocking, as it is best to keep the memory the same. With those 2 name brands you shouldn't have a problem.
There has been some talk about problems with A7n8x's and Crucial memory though I think it was older modules and not the new ones.