Would 2133 ddr3 have similar performance to the ddr4 2133? Because recently I had a build I showed my parents that had a ddr3 mobo & ram which they ended up ordering for my christmas present. It was an unfinished build which I later switched for a motherboard with ddr4 support, and the corresponding ram. Is it worth letting them know I checked their email to know what I got to try to make sure they get the right parts? (Not coming here for a lecture, on being a bad kid, or making a bad initial build. I updated the parts list, but I don't think they looked at the new one before buying the parts)