X99 Extreme6/3.1 BIOS Version

OK, I updated BIOS A to Version P1.20. I am now able to see and use my Kingston HyperX DDR4 2400 16GBx4 sticks. (Model HX424C15FBK4/64).

CPU is properly detected and features match up WRT BIOS settings.
RAM is properly detected and working - I did NOT adjust voltage settings.
MB is properly working, too.

Thank you to Parsec and company for the excellent help.

Dr Debug is reporting A6. That mean anything? (runs off to look up codes)

I put in the Crucial 4GB CT4G4DFS8213 stick and the system boots fine; thereby proving there are no bent pins on the CPU. Everything seems as it should.

So, how am I to upload the P1.2 BIOS?

I created a FAT32 USB Drive and copied the P1.20 BIOS to it. Do I simply put it in the USB7 slot and reboot?

After browsing the BIOS information it seems I can also perform a network/internet update. Won't that install P3.00 instead? Something I've been cautioned against uploading on page 1 of this thread.

Like2Byte wrote: Hi, I'm considering purchasing this memory for $17.00 (US): Crucial 4GB Single DDR4 2133 MT/s (PC4-17000) CL15 SR x8 Unbuffered DIMM 288-Pin Desktop Memory CT4G4DFS8213 This RAM *is* on the supported memory list also. Is this RAM supported by BIOS version 1.0? (Or am I just gambling now?)

Yes, that Crucial DDR4 memory will work! I've used it in my ASRock X99 Extreme6/3.1 board (I forgot to say I have this board too) with the 1.00 UEFI/BIOS version.

I combined a 4 x 4GB kit of this memory with a 2 x 4GB kit, and it works fine in this board. Combining kits is normally not recommended, because a memory manufacture can use different memory chips in the same model of memory, when they run out of one type. Crucial (Micron) makes their own memory chips, so that won't happen for a much longer time. I can OC it to 2666, which must be done manually, there is no XMP profile in this memory.

I don't know if you just want to get one DIMM/stick so you can get into the BIOS, or want to use eight of them in your board. I would trust any Crucial DDR4 memory they say is for X99 systems to work in our board.

I worries me that you cannot get that memory running when it is listed in the Memory Support list. I hope something else is not wrong, like bent pins in the CPU socket.

Kingston may have changed the memory chips in the model of memory you have, which might be different than the memory chips in the memory that ASRock tested. X99 was the first board to use DDR4. When Skylake and Intel 100 series chipset boards were released (that use DDR4), the memory controller in Skylake processors is not quite the same as it is in our Haswell-E processors. Kingston might have changed the memory chips in the memory model so it will work with Skylake systems, but that change is not right for X99. Just an idea.

We do not know that the board cannot run 16GB DIMMs, just from your experience. The method I described for you about trying to set the memory options is NOT a standard procedure from ASRock. It is a procedure that I thought of, and just makes sense.

Don't forget to clear the UEFI/BIOS if you try another kind of memory.

"Are you able to complete POST and get into the UEFI using one DIMM?"

No, I am not. I've rotated each stick into the DDR4_A1 slot and retried. Each time Dr Debug reports error 60.

My brother recommended trying it in pairs, too, (as I've already rotated each RAM stick into DDR4_A1 at least once) and seeing if that worked. That's not per the manual but if it wont cause damage....

Apologies for the quick succession of posts. Didn't realize that the person's message one replies to is beneath the editor. Had I scrolled I could have put this all in one response. Live and learn. :)

Confirmed: I only need BIOS Version 1.20. I will NOT update to Version 3.00 at this time.

Why doesn't the board understand 16GB RAM Sticks yet?

As I am unable to POST yet I'm considering RMA'ing the board today. I find it unacceptable that I might have to purchase a smaller amount of RAM just to get the board to POST.