X399 taichi recognizes only 24G out of 32G memory

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   Are you running XMP or just default 2400MT/s?

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xhue Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 17 Aug 2018 Status: Offline Points: 634	Post Options Post Reply Quote xhue Report Post Thanks(0) Quote Reply Posted: 27 Sep 2018 at 2:23am
	Are you running XMP or just default 2400MT/s?

mhp Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Sep 2018 Status: Offline Points: 6	Post Options Post Reply Quote mhp Report Post Thanks(0) Quote Reply Posted: 27 Sep 2018 at 1:34am
	Hi there, I just assembled my new PC with X399 Taichi MB and 4 x 8GB memories but the MB only reports 24GB of total memory. (Both in BIOS and in windows) I've tried several configuration and it seems that whatever put in memory slot A1 or A2 doesn't get counted. However, the MB seems to still recognize it. e.g if I put A2, B2, C2, D2, the memory is running in Quadruple mode with total 24GB, but if I put only B2, C2, D2, it runs in Single channel mode with 24GB. I also tried putting the memories in B1, B2, C2, D2. Then it reported 32GB total but only runs in Single channel mode, which is too slow. I also tried using a single slot to narrow down the issues. System doesn't boot if I use A1 or A2 alone, but using B1 or B2 works. It would be highly appreciated if you could provided some support on this. The memory is G.Skill F2666C16-8GRB. BIOS version is 3.30. Thank you!