Fatal1ty x399 won't post with 128GB RAM

Benja wrote: Hi, SVM enabled (SVM settings is needed to enable virtualziation functions), my memory are at stock speed/voltage...XMP profile is set to auto and the only other setting is enable XMP. Sorry but i don't want a workaround to have a stable configuration, i need a fix. I build my workstation/configuration for a virtualization lab and not for gaming pourpose, 128Gb is a must for my pourpose...i don't expect an enterprise support from Asrock...but if I haven't a resonable respone from the support whithin tuesday, I'll change the motherboard for another brand. @128noGB and @MisterJ if you consider to change MB pay attention to Gigabyte X399 Gaming 7, it have the same issue  http://forum.gigabyte.us/thread/1854/x399-gaming-128gb-ram-issue Waiting an ASrock response! PS. Yestrday i'm able to install VMware ESXi 6.5U1 on our buggy MB, OS see only 16Gb ( with 7 sticks installed, BIOS see correctly 7*16Gb)..10Gbit nic are not discovered (but 2 nic are enough to my lab)

Ahh, I must keep SVM enabled then as it is required for what I'm using this for as it is virtualization as well.

4x RAM sticks work just fine also.  No hardware reserved.  This only occurs with 7x RAM sticks.

from a quick read around on a google search

it would seem at present its not going to be cured by even using another brand of board

both gigabyte and asus seem to be having the same problem with x399
its just not liking 128gb/8 sticks

most users posts/feedback is cant get a boot with the 8 sticks, one or two guys have managed after many many hours of manual tweaking, to then be presented with windows not seeing all of the 128gb
phrases like '96gb system reserved'

i have literally found just one person stating they have had success
that was a gigabyte board and corsiar dominator platinum ram at 2400mhz

iif it was me guys

i would use the stable 4 sticks in quad (64gb) and stay with what you have for the later bios updates

(of course support tickets sent in with EXACT details of the ram kits and your board will help the bios/tech team to get the kits working)

Benja wrote: I have 1.3

Benja, if, and only IF, your system is STABLE on 4 sticks, I would highly suggest you upflash to 1.50. Using only 4 sticks to upflash with. NOT 8 installed.

1.50 addresses "some' 128GB (16GBx8) Kits. What ones I can't say as I'm not aware.

Please post back.

Is everyone here running BIOS rev 1.50 on their Fatal1ty X399 Pro Gaming MB's?

128noGB, do not upgrade yet. Please do as I ask in the PM and reply, letting me read your reply first. Do not flash to 1.50 if you have not yet.

parsec wrote: I don't know if this will help you, but I see a detail in your description of your procedure that if changed, possibly might help you. No guarantee... sorry to say. If you've done this already, never mind. Insert all eight DIMMs into the board, if they are not already there. Clear the UEFI/CMOS with the jumper on the board. Yes I want you to try running your memory at stock, default speeds, NO XMP profile. Plus you should always clear the UEFI/CMOS when changing the memory configuration. Yes it worked for you without doing that in earlier testing with seven DIMMs, but with XMP enabled? Regardless, please try eight DIMMs without XMP, and a UEFI clear before starting the board with eight DIMMs installed. With that much memory, you may not be able to run it all at 3000 without manual tweaking. Don't forget, most DDR4 memory like yours has the XMP profile tuned for Intel systems, not Threadripper or Ryzen. Your model of memory was first designed for Intel X99 board systems, the very first PC platform to use DDR4 memory. So while it may work with Threadripper, it was not designed for it. http://www.corsair.com/en-us/vengeance-lpx-128gb-8x16gb-ddr4-dram-3000mhz-c16-memory-kit-black-cmk128gx4m8b3000c16 If you had seven DIMMs running above the stock speed, that was very good. But all it takes is one more to cause difficulty. Next potential issue, common on Intel quad channel memory systems: POST completes and Windows boots fine. But not all of the memory is recognized. That will take voltage and memory settings tuning. About the exposed power connector wiring, those look like the ground connections for that connector. While it looks scary, shorting the ground connections would do nothing. Also, an M.2 SSD in the M.2 slot would not cause a problem with memory.

Hey there, firstly thanks for the response!

--->   Clear the UEFI/CMOS with the jumper on the board.

Could you confirm for me how to do this on the Fatal1ty x399 board?  I haven't found something that explicitly says what to do.

What I've done is this:  

1)  Turn off the PSU (the big PSU power switch)
2)  Press and hold the "Clear CMOS" button (button, not jumper) on the motherboard for 5 seconds
3)  Turn the PSU back on and boot

Is that correct way to clear the UEFI/CMOS?  I'm not even sure that is correctly clearing the UEFI/CMOS.  I can't figure out how to confirm it, since the system isn't POSTing correctly anyway.  The x399 Fatal1ty manual doesn't help on this as it doesn't specifically list exactly what to do.

I'm fine with saying "This memory won't work" (despite it being on ASRock's QVL).  I just want to know what memory would actually work.  I will go out and buy that memory in an absolute heartbeat.  I just need to know what to buy.  

The QVL told me this Corsair memory was the fastest to get, but it won't work, so what else should I buy that is the fastest?  Assume there is no budget constraint.

Many thanks again for the help!  If you tell me what to buy which is QVL for x399 ASRock then I'll buy it today (If Microcenter has it, I'll get it immediately and report back with the results on Saturday).