EVGATech_LeeM
We are planning to release a separate 1080 Ti Hybrid, designed to work with cards like the 1080 Ti SC Black Edition and 1080 Ti SC2. Jacob's mentioned it before, but it will still be a little while before we receive them.  The backplates are usable with the newer Hybrid kit, as well. You can't really compare the kits, because the newer one will be similar to the SC2 Hybrid, while the current 5388 kit is based on the regular design of a custom full-PCB baseplate and shroud.  The accessories, including screws, are different, as well.  
 
The main issue stems from the fact that the SC Black Edition backplate screw holes are a little larger than the holes in the Founders Edition, while the SC Black Edition screws are thinner than the standoff screws used between the PCB and backplate on the Founders Edition.  Founders Edition backplates have two very small squares of thermal pads, total; on the other hand, the SC Black Edition and other iCX Cooling/Tech cards have a great number of thermal pads and are designed to be used without standoffs.  Although the 5388 kit does provide screws for a compatible card to be used without a backplate (in addition to the screws provided for compatible backplates), those screws are not long enough to be used with a backplate, and would be too thick to work with a 1080 Ti using an iCX Cooling backplate.
 
To illustrate, here's a picture of the screws side by side:

 
The top two screws are used as the Founders Edition backplate screws and standoff screws, used between the PCB and backplate, respectively.  The third screw is used for cards which cannot use a backplate (includes 1080 Ti Black Edition, but also 1080/1070 cards in the compatibility list, as well).  The last screw is used on iCX Cooling backplates.  You can see that's a bit longer to cover the distance between the backplate and baseplate, but thicker than than the top screw, and thinner than the standoff screw.  Unfortunately, there isn't much room to find a screw that would let you use the 5388 Hybrid Kit and a 1080 Ti SC Black Edition backplate.  
 
If you're dead-set on using a Hybrid kit and a 1080 Ti SC Black Edition card with its backplate, then I encourage you to wait until the next Hybrid kit comes out.
 

bswope35
Thank you! I appreciate you keeping us in the loop throughout this thread. This is exactly the type of information that we needed. I am looking forward to hearing more about the SC2 style Hybrid kit now that I know it will be fully compatible with the SC Black (backplate included). I would definitely be interesting in ordering one. It would be great if it shows up relatively soon as summer is starting to ramp up here and temps are rising.

Zantis
Any updates on this? Does this kit 400-HY-5598-B1 ( support the backplate of the 1080 Ti Black Edition?

EVGATech_LeeM

bswope35
It looks like a new revision of the Hybrid Kit has just been released (part 400-HY-5598-B1 - https://www.evga.com/products/product.aspx?pn=400-HY-5598-B1). This looks much more in line with the SC2 style design. I assume that this is the previously hinted redesign that will be compatible with the SC Black and other non-FE cards, including full support for the backplates. Can anyone confirm?

I will confirm.  Backplates can be used with Founders/Blower, Black Editions, and iCX Tech 1080 Ti models (excluding FTW3 and KPE models, of course).

Hello,

Yes, I have double-checked and the 1080Ti SC Hybrid cooler is compatible with the backplate of the 1080Ti Black Edition. There are instructions in that Hybrid cooler's installation manual on how to reinstall the backplate.

Please feel free to contact us if you have any other questions.

Regards,
EVGA