Have you tried each module to see if both perform the same?
I realize you are coming in late on this, but it would be advisable that you take the time to read the entire thread before posting when you DO come in late. Because if you had you could avoid recommending remedies which have already been suggested to no avail. Just saying.
Have you tried the memory individually, in the A2 slot, to see if you can get them to run at the advertised speed when only one memory module is installed? And try both modules to be sure it isn't just a bad memory module?
I still don't see the results or answer to the question so that's what I'm waiting for.
My PC will not turn on when I try just 1 memory slot and no I don't know anyone else with another system where I can try my memory modules in.
So I am getting my replacement kit tomorrow. What is the safest thing for me to do? Load an A-XMP profile or do it manually?RAM can always be the reason for any kind of poor performance if something isn't right, but that doesn't necessarily mean that is the case, in this case. However, obviously if the memory isn't able to run at the advertised speed and in dual channel, performance is going to tank.
@gskill support , so you're trying to tell me that the fact that the G.skill configurator shows ZERO support for that motherboard on ANY module which is 2666 or 3000mhz, is accurate? Because when you search out compatible memory on the G.skill site for the OP's motherboard, the MSI X470 Gaming Plus, there are ZERO 2666 or 3000mhz sticks that show up. That can't be right, and if it is, it's a gross lack of any attempt to find compatibility.
So, if this is accurate, which I'm doubtful of, it could certainly explain why those sticks don't want to work right in your board.
Would you look at that https://gyazo.com/96adc35cc223b8c723d5e8066ddf8ec2I'd just set the XMP profile first, and only deal with setting things manually if you end up having problems.