I know I'm a little late to the party here but I just found the thread after experiencing this issue and figure I'd share my experience:
I got the card when it released and my temps would always hover around 52C-53C while gaming while connected to a substantial water cooling loop. I thought this was a little high compared to other cards I've had with EK water blocks but I figured since it was a hybrid there was some compromises and this was the best I was going to get. I never realized the block wasn't making great contact.
Well that changed last week when I upgraded my motherboard and CPU. After reinstalling the GPU in the new board I immediately noticed that my temps had skyrocketed to nearly 90C, it was alarming because I never even heard the fans turn on before but they shot up to 100% as soon as a I launched any 3D applications. I guess removing the card from my old system and reinstalling it caused something to shift/made the pre-existing issue much worse. I did a little experimenting and after a while I realized that applying upward pressure on the cooler with my finger caused the temps to instantly drop down to between 50C-60C. So I did what others in this thread have tried and I used a little wooden dowel to support the card and this more or less fixed the problem. My temps were in their normal range that I would get in my old system.
Then I found this thread because I was curious if anyone else with the card had a similar problem and I noticed a user suggested the "washer solution". I decided to try it yesterday and I removed the backplate and cooler and inserted small plastic washers under the springy screws. I needed 2 different sizes but luckily I had tons of these little washers from all the waterblocks/cpu coolers/motherboards etc that I've bought over the years.
I'm happy to report that after applying this fix I'm seeing temperatures lower than I've ever seen with this card, after a long gaming session my max temp was only 44C!
Unfortunately though I found the RGB connector that controls the LEDs on the infinity panel very difficult to remove and I inadvertently severed the wires with a pair of needlenose pliers attempting to remove it. This was mostly my fault, I got a little overzealous trying to remove it and I should have pried it from the edges with a flat screwdriver instead. Anyway, I had to find a donor connector from an old 980ti heatsink that was the same shape and size and solder the wires to it to get the LEDs working again. So the washer solution definitely works and I recommend anyone with this problem give it a try, but be careful removing the connectors!
I tried tucking the wires away the best I could but you can sort of see some of the carnage here:
https://imgur.com/NXSj8PGAnyway system is all up and running and cooler than ever!
https://imgur.com/YL7GmZx
