Oh, I apologise! I did find something, though! Someone had written: "The gigabyte oc uses the reference pcb and since the 2070s uses the same pcb as the 2080 those blocks will fit". Of course, this is just a message from a user on Reddit, but maybe it's true. So that means you could basically use a watercooler from an RTX 2080? BTW Here is the Reddit:
https://www.reddit.com/r...
You can read up a bit here.