ExcessiveGBH wrote:
Don't worry about the GPU's being arse about in NVCP or MSI A/B etc. Everyone is seeing this for SLI on these M/B.

Your other issue is not related to the above but have you tried default settings, clearing CMOS or re-flash BIOS?

I have tried default settings and since the original post I flashed to BIOS 1004 (up from 0802). Still have the issue where first GPU is not posting in BIOS.

I'm curious to see if the posting issue will get resolved when I take apart my cooling loops and re-seat the GPUs.

Skunkfoo wrote:
I have tried default settings and since the original post I flashed to BIOS 1004 (up from 0802). Still have the issue where first GPU is not posting in BIOS.

I'm curious to see if the posting issue will get resolved when I take apart my cooling loops and re-seat the GPUs.

Same here! i can't get into the bios with GPU1 and even i can't get into the bios via Display Cable! ( just with HDMI i can)

I have a somewhat similar issue.

In this case my R6E motherboard reports both gpu's detected yet when the system boots, it attempts to POST on GPU2, leaving my screen attached to GPU1 in the dark until windows login screen. Very frustrating when it comes to tinkering in and out of bios with repeated power cycling. SLI performance seems unaffected yet NVCP reports my monitor being attached to my second card.

Kinda wish I don't have to keep flipping the PCI-E dips or plug in an HDMI cable on the second card and switch display input on my monitor everytime I want to go to the BIOS.

Dashwood wrote:
I have a somewhat similar issue.

In this case my R6E motherboard reports both gpu's detected yet when the system boots, it attempts to POST on GPU2, leaving my screen attached to GPU1 in the dark until windows login screen. Very frustrating when it comes to tinkering in and out of bios with repeated power cycling. SLI performance seems unaffected yet NVCP reports my monitor being attached to my second card.

Kinda wish I don't have to keep flipping the PCI-E dips or plug in an HDMI cable on the second card and switch display input on my monitor everytime I want to go to the BIOS.

Have you tried just having one card installed in PCi 1 and if it still doesn't post try the other card. Just a process of elimination.

ExcessiveGBH wrote:
Have you tried just having one card installed in PCi 1 and if it still doesn't post try the other card. Just a process of elimination.

i've tried
But still can't get into the bios via display port no matter one or two cards installed

ExcessiveGBH wrote:
Have you tried just having one card installed in PCi 1 and if it still doesn't post try the other card. Just a process of elimination.

GPU1 by itself posts normally.

Dashwood wrote:
GPU1 by itself posts normally.

Ok then...so now you have proved that MB & single video card are working correctly.
Did you try the other card as a single also?
Have you plugged in all the power cables for the mother board? There’s one down the bottom EZ_Plug, page 1.23
I see you’re using Win 10 but what version? (Insider builds can have issues)
Check the PCi contacts on the second card.
Install the second card in PCi slot 3 with the HB SLI bridge. Then retry.
Sometimes just reseating can fix issues.
Other things to try. (it’s a pain in the arse)
Swap cards around, just take note of which power connectors you are using from the PSU and also swap them around to just to eliminate voltage issue from the PSU.
Try another PCi slot, will require different size SLi bridge or use two of those flexible ribbons SLi straps (can use one strap also but want to keep continuity in your set up) Just to eliminate PCi 3 slot.
Try just one SLi strap instead of the HB bridge.
Check BIOS for each video card.
Have you access to a friend’s PC to try your cards in theirs and vice versa.