XPS 8940, ASUS TUF Ultrawide, no pre-Windows screens

That sounds like I could do that.  Im just worried about the blinking error light.  If its an Nvidia issue that could possibly be resolved in the future and nothing to do with the Dell hardware, i'd be more comfortable with that.

I did order a the Dell Monitor 34"(144hz) and am considering returning the ASUS at this point.  Its very hard to find anything in relation to what my issue is online.  So I do appreciate all the info you've shared with me.  Thanks.

I have an old XPS 8700.  Do you mean taking the vid card out and putting it into that?  Would that graphics card be even compatible on that older motherboard?  I wouldn't want to "ruin" anything by attempting that, actually.

just make sure I understand your issue.  you are able to get good video signal from RTX 3060ti on your monitor, except for the start up led error and no show of Dell logo, correct?  other users had reported no boot and no DP video signal at all with their 3060Ti.  If you are able to get good video, seems the error is just mysterious and annoying but no real downside to performance.  am I missing something?

Re: Using the onboard graphics DP works with the monitor

when you use onboard DP, is the 3060Ti also installed in 8940 at same time?

Yes that is exactly correct. The PC will boot but the monitor wont dispay/turn on until the login screen for windows (no Dell logo so I cant go to the BIOS if i needed to). Hdmi to hdmi works no problem.

With DP yes Im able to boot, get my desired refresh rate 165hz, etc..

If i just use hdmi i can only get up to 100hz. 

So it seems like such a waste if I cant utilize this monitor as intended at 165hz with the DP.

My suspicion is that Dell is going to replace the vid card and mb (est Jan and the same thing is going to happen.  The what are my options.

Re: if I cant utilize this monitor as intended at 165hz with the DP.

I suppose you can use HDMI to access bios if needed (which you should not have to do on regular basis) and then use DP at 165 for your video applications.  the error is mysterious but you are otherwise doing all right.  you can run a user benchmark test to check the 3060 Ti and compare it to other users.

is there a way you can test the DP signal of your RTX 3060Ti in another desktop pc?  what is your Dell psu power rating?

Yes. The led error is probably due to a bios initialization error of 3060ti to handshake with monitor via DP.  Because of the error you have no Dell logo during POST.  

So I connected this ASUS monitor via DP to the PC gpu DP.  And also connected another monitor via hdmi to hdmi.  Booted it up, so far no error lights.  I got the Dell logo to appear on the HDMI monitor and everything seems to be running good with no error lights.  Ill try a to reboot again and see if the error lights return.  So far just leaving it on and running to see if it does anything.

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@robbysee wrote:

So I connected this ASUS monitor via DP to the PC gpu DP. 

And also connected another monitor via hdmi to hdmi. 

Booted it up, so far no error lights.  I got the Dell logo to appear on the HDMI monitor and everything seems to be running good with no error lights. 

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Yes, this is what you do when you are using strange/extreme resolutions and display modes.

Monitor should Auto-Detect between proper ports during boot-up. 

Wow.  This update wasnt showing up as a option in the dell app.  Anyway.  I updated it and just connected the DP to DP only (with no other connection) and it booted nicely with the Dell logo and currently there is no blinking error light.  Ill keep an eye on the next little while, but thank you so much for all the info your help.  Days and weeks of this, trying to work with support from dell and asus was a little tiresome.  Thanks again.

@robbysee  - Glad that solved the problem!  It should also put an end to the blinking power button too.