I just got my kingpin today and i took out one of my 3090s so instead of 2 3090 FTW 3 ultras i have one 3090 Kingpin and one 3090 ftw 3 ultra, but the way the kingpin is designed makes the nvlink bridge placement basically impossible. any tips or info?

You can Sli with riser cables out side pc case. You raise kingpin card up to make even with ultra so Nvlink fits . Looks like a train wreck ,but works.  http://www.3dmark.com/pr/778825

I  just did that because Of not having 2 matching cards. I just have the Ultra with water block in case now. Will get another Kingpin or Ultra when I can  to run Sli. It was fun to play with and the Ultra with block is the better card over the Aio kingpin. With a i9 10980XE  in SLI in time spy ex. it can pull right up to 1600 watts total for rig.

Dabadger84
You can thank NVidia for not standardizing their own connectors & not having a "reference PCB" design on their FE cards for this.  Same issue happens with almost every brand including FE models - I don't understand why eVGA couldn't at least standardize their own plug in distances from the slot etc, but it is what it is.
If you want to run 1 FTW3 & 1 Kingpin, you would have to use riser cables & rig it up to fit, that's the only way to do it.  I.E. how GamersNexus had to do their first SLi attempt becuase they didn't have matching cards.

 
Honestly, I don't understand, why the NVlink Bridge needs to be rigid.
 
Back in the days, you could get flexible Sli Cables. That would fix all NVlink Problems for the people that want to run sli on 30's...

telehog
You can Sli with riser cables out side pc case. You raise kingpin card up to make even with ultra so Nvlink fits . Looks like a train wreck ,but works.  http://www.3dmark.com/pr/778825

Sorry I'm a little late to this conversation but I have to say...
 
That is an AMAZING build!!!!!!! Seriously pretty much my dream setup. Are you using an Obsidian 1000D? Looks amazing! I think the video cards look sick together! I've had sli in the past, I know they are not cost efficient but I f*ing love them. 
I have a 10900KF on an ASUS Maximus XII Apex with a 3090 FTW3 Ultra. I just ordered an optimus block for my cpu. I'm #39 on the kingpin card queue right now. That's how I found this googling if you can run kp and 3090 in nvlink.
This will be my first full custom watercooling setup. I am just finishing up my shopping list on aquatuning so hopefully in a month or so I'll have everything set up.
 
Again awesome build!

That's awesome! I have an Obsidian 800D right now. I need something new though, this is my 4th build in the 800. I bought a Phanteks Ethoo Pro 2 a few months ago because it was well reviewed. As soon as I took it out of the box I knew it wouldn't work for me. It's too small and just seems cheap to me after the Obsidian. The Ethoo is all plastic and not near the quality of an Obsidian. It's not a fair comparison, they're in different price brackets. 
I'll most likely end up buying a 1000D. It just sucks where I live there are no computer stores so I have to order everything and shipping is a pain. There was a thermaltake full tower I wanted but no one would ship it to me. 
 
Where do you buy most of your water cooling gear? Are those monsta rads? On your motherboard are both GPU's getting x16 PCIE?  
 
I'd say go for another KP, you're probably be waiting the shortest amount of time for that just because it's the most expensive and the queue would be the shortest. 
 
I didn't originally plan on buying a 3090 but I signed up too late for the 3080 queue because I preordered one from memory express here in canada but they gave no info about queue position or length so I signed up for the 3090 queue and only waited a month, got it Nov. 3. I just cancelled my preorder and got a refund. I was a little late signing up for the KP queue but I'm only #39th now. I really like overclocking that's why I'm getting a KP. I have the hybrid kit for the 3090 now but eventually I plan to have an Optimus block for the 3090 and KP.  I haven't caught a 3090 block in stock at optimus yet. I just got the V2 Intel CPU block ordered a few days ago. Hopefully soon I get a 3090 block ordered. It will be a couple more weeks after ordering before I get it so hopefully soon. 
 
I'm guessing you're pretty happy with your optimus block? Everything I've read and watched said they are the best of the best. So I'm pretty pumped to get mine. This 10900KF runs hotter than h*ll! The Apex is a beast of an OC motherboard I just need to keep everything cool enough now.
 
Again awesome build! I love seeing sick builds like yours, it gives me something to strive towards. 

telehog
You can Sli with riser cables out side pc case. You raise kingpin card up to make even with ultra so Nvlink fits . Looks like a train wreck ,but works.  http://www.3dmark.com/pr/778825

 
What is going on in there? I feel like I'm watching Mad Max - The Computer Warrior edition LOL