I heard somewhere that mixing your memory is usually a bad idea, also even using different kits say 2x4gb and separate 2x4gb is not good either. How true is this?
I currently have a G.Skill 1600MHz 4gb (http://www.gskill.com/en/product/f3-12800cl9d-8gbxl) mem stick that when running through memtest x86 gives me a ton of errors (not overclocked, all is stock) they have a lifelong warranty, but the require both sticks for testing so I haven't gotten into it yet. In the end, is mixing the same memory very bad, I can understand mixing different manufacturers of memory would be, but how about the same manufacturer and the same speeds?