I was hoping they had given you an exact cause of the situation.  If they had just upgraded the quality of the cable, it should have worked normally on a correctly configured 3090Ti.  If they had to change a physical connection point, that might explain why the first cable would work and the new one would not.
 
If you noticed, some of the new Z690 motherboards for Asus has a capacitor that were installed backward and some boards caught on fire.  Things can go wrong in the manufacturing process so maybe that is what happened in your situation.  If that did happen, you might expect to get a new cable or perhaps a replacement video card.  If it is the USB connection, I don't understand why that would matter if you were connecting to the system USB connectors and not the USB C connector on the video card.
 
I don't know why but right now the 3090Ti card has its own special Nvidia driver.  I have not seen a card before selected for a special driver.

Having same problem, new driver did not correct display port issue. Very frustratin.

Wesley_Pipes
I am running into the same sort of display port issue with an Oculus Rift S that I just posted about here as well. I have been following the multiple threads about this issue with the HP Reverb G2 but haven't come across any Oculus users saying it works for them or not so.....maybe there is a VR in general display port issue going on with the 3090 ti. Will keep my eyes on this thread as well.
 
Cheers

Same here! Phew, I sure am glad I'm not the only one. I got a Reverb G2 as an upgrade but also as an alternative to the Rift S which wasn't working after I installed my 3090 Ti. Same error too, Display cable. I've read all the info on the reddit thread(s) from nvidia and hp on this, and it seems like everyone's generally aware of it. I'm going to sit back and wait for a fix hopefully. Apparently the V1 Reverb cable works (versus the V2 cable which doesn't)... may try that.

The same thing happened to me, used the V2 cable and would not connect.  I had to buy an old V1 cable on eBay and that worked just fine (not sure why).  
 
I had to use the USB C to USB A converted in order for it to be recognized with the V1 cable.
 
Hopefully they will address this soon, either at EVGA, Microsoft, or Nvidia.

Nvidia 512.77 drivers now show the 3090 Ti as compatible in Windows MR. Unfortunately the Reverb G2 still gets 1-4 error when connected.

I am here for the exact same reason. Brand new build, dropped tons of cash to get all the up-to-date stuff, and this... unbelievable. Very Very frustrating. Please keep us posted if anyone finds a solution. Thanks. 

Here's what was on the latest driver update...
GeForce RTX 3090 Ti] Oculus Rift S/Pimax 8Kx is not detected. [3632289][3626116]

Not a peep. Did go through technical support with nvidea and HP, but after moving up the totem pole, it was … no idea, we’ll get back to you!  Mine is also sitting in a box until either HP or Nvidea does something. Whatever that something is?

Nvidia posted last week on reddit that they were still looking into it. So it isn't a dead issue but it is definitely slow moving.

Sadly I have not been able to do any VR in over a month because I had already sold my old card. Pretty frustrating.

Yeah still ongoing issue, well I am a Oculus Rift S user but seems to be most of the VR headsets that use display port.
 
I installed the new 512.95 driver to see if anything changed even though they still have the issue listed in Open Issues notes, but alas still no VR.
 
Come on Nvidia! I didn't buy a $2000+ video card to watch 2D porn like a peasant.

jnleslie1
I contacted HP customer service and they're sending me a new data cable which is supposed to fix the issue.. I should have it this week I'll report back to you guys to let you know if it works.

Now that's very interesting, yes please report back and I am going to contact HP tomorrow.  From all my understanding, the V2 cable didn't work, V1 yes if you could find it, does HP now have a V3 cable...hmmm

What is HPs problem? First you need a new cable for AMD and now that cable doesn't work with 3090TI so use the old cable again? What if you have a 3090TI in an AMD system?

I talked with 2 very nice HP tech reps today, they had not heard of the problem, I chatted with one last evening, have not heard of the problem, EVGA support had not heard of the problem.
 
We are screwed :(
 
All these tech guys and gals where very nice, I think the problem comes from above, we are .05% of the buying public with this combo, why would they care?
 
Heck I've even heard that the youtubers out there say it's too small of an issue to bring up in there vids.

@Saltgrass,
 
What have you heard about this with Win 11 upgrade?

If I was a betting man, I would put big money that this is not a WMR issue, rather an Nvidia driver issue.  Could be wrong, but this is my uneducated guess, lol