Asus X399 - won't post with 2nd GPU (Code OE )

eco_bach

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Oct 18, 2015
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Hi guys
Posted on the Asus ROG forum but thought I would ask for help here as well. Anxious to get my 2nd gpu working

I have a Asus X399 extreme mobo with a Titan V GPU and 1200W EVGA P PSU.
Works great, no issue

Just purchased a 2nd GPU, Nvidia RTX 2080 and want to have a 2nd GPU running on my rig

However, when I install the 2nd GPU and boot, I always get a Code OE error and can't even get into BIOS

What I tried

1- Clearing CMOS

2- Booting again with just the TitanV in PCIE slot 1 to confirm everything still works

3- Booting with ONLY my new RTX 2080 in PCIE slot 3 to confirm it boots (yes)

4- Swapping the power card to GPU's

My best guess is that I need to change something in my BIOS in order to boot with a 2nd GPU

Does anyone have any suggestions?
 

eco_bach

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Oct 18, 2015
116
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18,580
Update:
Tried putting my RX2080 in PCIE slot2 instead

Seems to work, however, doubt this is a workable solution because ther is NO clearance between my Titan V and the RTX2080, and the back plate of the 2080 gets quite warm!

Running out of options I next tried swapping my cards

TitanV in slot3
2080 in slot 1

I seem to be making progress, as I can post, get into BIOS, however once I try and get past the Ubuntu GRUB menu I get repeating BAD DLLP and BAD TLP errors

Possibly related to my threadripper or ??
https://forum.level1techs.com/t/threadripper-pcie-bus-errors/118977

arghhh!!!!!