Aorus X399 / 2950X boot failure / loop, POST code 16

[Cantanko]

Hello folks,

 

Long time lurker, first time posting a new thread and unfortunately it's a plea for help - sorry :-(

 

New build to replace my ageing Sandy rig - Aorus X399 xtreme with a Threadripper 2950X, Seasonic PSU.

 

Problem:

On power up, the board cycles through a few codes but gets stuck at LED diagnostic code 16, which the manual helpfully lists as reserved. If you wait, the BIOS LED toggles to the backup BIOS, the LED codes cycle again and get stuck at 16 once more. The BIOS LED toggles back to the main BIOS and this repeats over and over. The CPU LED is lit red, which worries me.

 

Diagnostics so far:

I have a Corsair Vengeance CMK32GX4M4B3466C16 memory kit (which is actually on the approved list for that board / CPU combo). Pulling each stick makes no difference until I remove all RAM, at which point it gets stuck on code 10, which is listed as "PEI core is started".

 

I then pulled the CPU to check to see if I had mashed a pin or something, and can not see any damage at all. Trying a boot without the CPU at this stage gives code 00, which is again reasonable.

 

PSU voltages meter out fine, the CPU EPS cables are attached, having a video card present or not makes no difference as its not getting that far. The fact that its toggling between BIOSes worries me, as does the red CPU error LED. The damn thing has even been built at an ESD workstation!

 

And that's as far as I've got - any ideas however trivial would be welcome as its years since I've done my own complete build and could be missing something blindingly obvious. Googling for this state of things has got me nowhere.

 

Thanks in advance!

 

EDIT: Haven't checked for beep codes - need to actually find a speaker!

[Guest]

That board came out BEFORE the chip. Does it have a BIOS flashback feature? I'd bet it needs to be flashed.

[Cantanko]

The board supports Q-Flash: the manual states that you stuff a FAT12/16/32 USB in with the BIOS loaded and press the END key during POST.

 

So far, no luck; the manual shows the flash feature with video up and running - I'm not getting that far. I don't think it's even getting as far as initialising the keyboard to realise I'm pressing the END key...

[fop007]

I am having the same problem but with the 2920x. I got the CPU and motherboard replaced and the same error happens. Did the BIOS update solve it? The Gigabyte site says the CPU should be supported on all BIOS versions so I am very confused. Any follow up would be great, thanks.

[hyyyyyyyyyyy]

Hi did you solved this problem? I'm experiencing the same problem

[hyyyyyyyyyyy]

On 9/27/2018 at 6:49 PM, Cantanko said:

The board supports Q-Flash: the manual states that you stuff a FAT12/16/32 USB in with the BIOS loaded and press the END key during POST.

 

So far, no luck; the manual shows the flash feature with video up and running - I'm not getting that far. I don't think it's even getting as far as initialising the keyboard to realise I'm pressing the END key...

Hi did you eventually solved this problem? I'm experiencing the same problem

[Sir_Cadillac]

Same here. Aorus pro Board with 1920X. Cycling through some codes and resting at 16. No video output. Neither on hdmi, nor on dp. RTX2080 nVidia Founders Edition.

[alphag33k]

Same issue. The machine has been running perfectly for 3 weeks. Put it to sleep last night and it will not boot. Just cycles codes pausing at C0 and 16. I've pulled everything and put it all back.

[JackKelly]

I'm having a similar problem.  Did anyone find a solution?!

[JackKelly]

Oops, I figured out what the problem was - I hadn't put the RAM in the correct slots!  Doh!

[DarthSeal]

So I received code 16 on two different x399 boards from different motherboard manufacturers using ECC RDIMMS from two different manufacturers.

The X399 supports ECC but not registered signal processing

picked up some ECC UDIMMs and both boards booted right up.

 

I hope this saves someone some time.

[Mannyshu]

Got the same issue, either error 16 or 10. after reinstalling the rams hundred times (a lot of force needed) and reinstalling the cpu I realised it has to click twice. Just the second click is barely audible and sometimes they click simultaneously. also check bios, my 3200 ram bios identified as 2400, its simple to change it there tho.