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Z87 PRO4 showing only 4GB memory (16 installed)

Have a new Z87 PRO4 MB.
I installed G.Skill memory, 16GB (2x8GB) #F3-12800CL10D-16GBXL.
The BIOS is reporting that it is in dual channel mode, but that it has only 4GB (2x2GB) installed.
"2048 667MHZ (DDR3-1333) 9-9-9-24"(twice)
I know that F3-12800CL10D-16GBXL is not on the compatibility list for the MB, but F3-12800CL10Q-32GBXL is, and G.Skill explicitly lists the Z87-PRO4 as being compatible with #F3-12800CL10D-16GBXL.
My understanding is that the two are of the same spec with the single exception that the latter is 4x8 instead of 2x8.
Do I really need to pull out the F3-12800CL10D-16GBXL and replace it with something else?
Or is there some other setting or configuration I should try to get it to see all 16GB?
I have tried putting the memory in slots 0 & 2, as well as in 1 & 3.
ANY thoughts, ideas, or suggestions would be greatly appreciated.
-Gary
3 answers Last reply Best Answer
More about z87 pro4 showing 4gb memory installed
  1. Are you running 64bit Windows? 32bit only addresses about 4GB.

    Also possible bent CPU/mobo pin or bad RAM.
  2. Windows OS is not yet loaded on the system. I will be loading Win7 64 bit once Everything in the BIOS appears normal.
  3. Best answer
    Where do you see this value?

    "2048 667MHZ (DDR3-1333) 9-9-9-24"

    The memory should work fine in that motherboard and show the full 16GB.

    Thank you
    GSKILL SUPPORT
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