RTX 3090 no longer works after attaching AIO water cooling

Hello everyone,

I replaced the stock cooler on my ROG Strix GeForce RTX 3090 with an Alphacool Eiswolf 2 AIO because the stock coolers were to loud for me. The replacement went fine as far as I can tell, however, the 3090 no longer works:

* Installing the card with the AIO results in the PC not booting properly (the motherboard gives me a b2 error code). * Removing the AIO and reinstalling the stock cooler does not change anything (still b2). * Removing the coolers completely and just inserting the RTX 3090 allows the PC to boot properly, however, the 3090 is not recognized at all. * Installing a different card (an older RTX 3060) works fine, the card is recognized, so I'm pretty sure the problem is not the motherboard. * I've brought the 3090 to a repair shop for inspection and they were unable to figure out the issue.

I have inspected the card and cannot see any visual damage I might have caused during the cooler replacement - but I have no idea what else could be causing this issue. I have uploaded pictures of the 3090 [here](https://imgur.com/a/z33tfuR).

Any ideas?