Both memory modules run properly on a MSI 870A-G54 motherboard with Phenom II X4 955 BE. No problems in detecting the bolt. A little confused, I was whether the words "Simm" in the model number? I thought that would be a "Simm", but it is definitely a dimming. There is probably no DDR3 SIMM modules, but you never know. To elicit this, I first had to investigate on the manufacturing side, because this can be found here in the article description does not notice. This should definitely be supplemented times, so that all issues have been resolved. Otherwise, as I said, a very good memory module kit for the small purse.