MSI x399 MEG Creation RAM issue

tep1981 · 14 Mar 2019 at 10:15

Corsair Vengeance LPX 4x 16gb 2666mhz, installed in the recommended slots but only 49gb is recognised, Windows reports the same that only 3 slots are in use, I've tried enabling A-XMP/reseating the memory in serial number order

I've used the same memory in my other Zenith Extreme board with no issues, albeit that was running a 2950x

Any other suggestions?

orbitalwalsh · 14 Mar 2019 at 14:04

Mobo RMA ?

Best thing to do is try every stick one at a time I. Every slot . Least that way you've cleared the way in RMA reason.

Freddie1980 · 14 Mar 2019 at 19:53

Update the UFEI software?

Minstadave · 14 Mar 2019 at 20:41

Could be bent pins in the socket. That could stop one channel working.

tep1981 · 15 Mar 2019 at 07:36

I've tried each stick on the far right slot and 1 stick causes a no video signal, however when I use a the other 3 sticks and the suspect stick in another slot it does boot but as mentioned the motherboard is giving conflicting results
https://imgur.com/x3keaaJ

sandys · 15 Mar 2019 at 07:53

I had that BIOS said I had 32GB and windows recognised less and only replacing the RAM kit solved it, others have had similar due to a poorly seated CPU.

does the machine boot with the single DIMM that failed in last slot placed in another slot? On my TR with just one stick in it would boot and load into windows, so I just tried it with each stick until I found the offender that wouldn't boot into windows.

Something you can also do is run the RAM in the other channel.

tep1981 · 15 Mar 2019 at 12:58

No the single DIMM does not work in any slot, also if try and use the 4 DIMMS in a different slot configuration I get warning saying that these slots are not optimised or something like that

sandys · 15 Mar 2019 at 13:29

Sounds like you have a faulty DIMM then much like I did.

Minstadave · 15 Mar 2019 at 14:21

sandys said:
Sounds like you have a faulty DIMM then much like I did.

Yup seems the most likely case.

Skynet5 · 16 Mar 2019 at 10:38

Minstadave said:
Yup seems the most likely case.

Best result really. At least you sent RMAing the mobo.