G.Skill Aegis 8GB (3000mhz) Not posting on Z370 board (MSI)

[tsepoulidisgiorgos]

Hello dear community,
I want your help with my issue. I want to say that i already did a search on memory forum section but didnt find something close to my case, so i m trying this new tread in hopes of finding a solution.
(also please excuse my english skills as its not my primary language).

So the situation is this. I had a pc with 7th generation cpu (i5 7600k) and the according motherboard. On this system i had a single 8GB G.Skill ram .
Then because of my motherboard being a bad, (the pci-express slot was dead after some use) i bought new one. i also found a chance to updrage my cpu while doing this change, by selling my old i 5 for the new 8th gen i5-8600K

So far so good, the new motherboard and cpu arived. alongside with a NEW G.Skill Aegis 8GB (3000mhz), wich is the exact same ram as my previus. this was to increase the capacity from 8GB to 16GB.
The problem is that, when i put the 2 rams in the new mobo, the computer did not post. I used the 2 slots that my manual and some forums i searched, 2nd and 4rth slot in my case. So i removed both memory chips and i insert just ONE of them to my FIRST ram slot. the results was this : the pc posted, and it suggested that i m not using an optimized slot, and that i should try the 2nd slot (isntead of the 1st i was using at the moment). I did it and then it posted absolutely fine.
Now after this, i believed that the combination of slots i was using, was bad. So i tried all diferent combinations. but no matter what the pc did not post with the 2 memry chips on it.

Then i moved even further and replaced the already working memory at the 2nd slot (the correct one according to MSI for when using a single module memory) with the one that i was puting on the other slots. So... the second memory did not post. that is as, it couldnt post on ANY ot the 4 slots. while the original (the one i had before i purchased the one one ) was working perfectly fine.

So after talking with the shop that i bought it (its located in another town so i couldnt take my pc to them for checking) we assumed that the memory is D.O.A and i sent it back for replacement.

Now the funny part. the technisian called me today. and he says that the memory is working fine both at 2133mhz and 3000mhz alike (with xmp enabled or dissabled).

We couldnt find any reason for this behaviour since the 2 rams are absolutely the same type. Thats where i want you guys to enlighten me and help with your knowledge. Perhaps someone had this problem before, or solved it for someone else?

Thanks in advance

 

[scout_03]

you did put the new memory in the system and no matter witch slot you use did not work so i would go see him with system and ask it to test ram in your system with you to prove that ram is working if not ask for another module .

 

[zyh1987]

does it work @ 2133 mhz with the two memory chip? or are you not able to boot with them at all.

i would reset bios to default, plug both ram in slot 2/4 then try to boot into bios.

if that works, there is something wrong with the xmp (could be different dram chip, despite the same model)

 

[10tacle]

If you do not buy memory in a kit (2x, 3x, 4x) then you are rolling the dice on separate modules being compatible even if the exact same model. There are many technical reasons for this including manufacturing tolerance differences at the time of the silicon fab. Also, memory vendors switch between different memory OEMs depending on manufacturing cycle. For example you could buy a Corsair stick one day by itself with Samsung memory, then the next day buy another single chip and it will have Micron memory.

There's a reason memory is sold in kit form: it has been tested to work together at the factory.