Has anyone purchased and applied this block to the FTW3 3090?  I am seeing people with issues from the EK block and it honestly has me a little worried.  I bought the extended warranty for the card but really don't want to have to RMA it if there is an issue with the EK block.  I have both on the way but would like to see if anyone has had success with the Optimus.

I have the optimus block. It took 7 weeks to get it.  I've had the same experience as tt0ne above.  Temps are what you would expect from a passive backplate with a giant thermal pad.  It's super easy to put on.  It's a very chonky boy at near 8 pounds so expect to support the card if not mounting it vertically.

When is the EK active coming out for 3090 FTW3? I wonder if it will outperform the optimus

That's ironic - I would give the opposite advice and say that you should run these on water because of how much heat they generate.
 

Jynxed16
if you want to run the risk of ruining your 3090 sure go ahead and do it.

I work for micro center I’ve seen more of this then you’d like to believe

It's not an issue of keeping the card cool, it's an issue of people being morons taking the cards apart.  It happens with every single card people want to water cool.

Blemish items are usually ready to ship in a few days or so.  "In stock" has their manufacturing times added after you order.  CPU blocks are fairly quick within a couple of weeks, the GPU blocks are 4-6 weeks.  I ordered my GPU block in April and got it about 6 weeks later.  The AMD CPU block took about 2 weeks from order to delivery in late May.  I have been happy with my order and would buy it again without a doubt.  

Loving every second

Where can I buy an Optimus cooling block?
(Germany?)

The reason I posted what I did 7 posts ago, has to do with how conditioned I am to the quick selling out of things during this time of various computer component shortages. When I went to Optimus' site on Friday to buy the block, I thought there would be a mad scram to buy a small amount of blocks at noon Eastern, and to get one, you would have to be quick. As it turns out, no, it is not an F5 game; when Optimus opens the FTW3 blocks up for purchase (which for regular stock, is like a pre-order, because it ships in 4-6 weeks.) the purchases stay open for most of the day. There was no need to rush. My reaction was added to because I bought a blemish block. I would thought there was only one of those, and so I couldn't believe I was able to buy it. It turns out that they had a whole production run they were not satisfied with, so the block I bought truly existed. 
 
The block arrived today. It was a copper block, as apposed to the nickel ones they are selling as main stock, and it is beautiful. The obvious question is what the blemish was, and I am not actually sure. There are no blemishes in the acrylic. What I did notice, was there were imperfections in the micro fins on the right side of the jet plate like structure if the block is oriented such that the ampere text is in the upper left. It is subtle. It appears as if that 20% off was essentially a gift. 
 
The thing is heavy of course. There are Lian Li anti-sag brackets at my nearest microcenter, and only there. The gas to drive there will be twice as much in price as the bracket. I am trying to fit this into a Lancool II Mesh with 120x360x60 mm radiator in the front with push pull on the top two sections. The card will bisect the entire case, so I have to fit my D5 pump (EK packaging) entirely underneath it. This way the 3 slot air cooler will not even fit in there, and I will have to dismount the pump and have it dangle awkwardly to test and benchmark the card on air. Then, with EKs mounting bracket (I could jimmy up a custom one.), if measured correctly, the top of the pump mount is exactly the height the block will stick down, so the bock will sit exactly on the pump making a accidental anti-sag support. It is like using USB type A cable (oh, I hate that cable) to retain a graphics card, except not as bad. 
 
My FTW3 3090 to put it on will not be shipped until Monday, according to EVGA. (It is a step-up, they have to inspect and test my old 3060.) Then the 'fun' starts.
 
 

Has anybody ordered the 3090 ftw3 block from the uk, if so how did everything go?. 
Out of all the 3090 ftw3 blocks I have looked at online the Optimus block stands out as the best, I would like this block for my new build. 

This block won't fit a regular O11D horizontally.

I had to sell mine and go with an XL version. And since it has more room, I'm probably gonna mount it vertically so I can stare at the beautiful block.