Hi John,
Which CPU water block do you have?
Would you send us the photo and receipt of the O11D water-cooling?
shopservice@bitspower.com.tw
Please send us an email, thank you.
Z490 is the Intel motherboard, if your CPU water block is for AMD,
you can switch the bracket to Intel with BPTA-CPUMSIPT.
There are the links to the bracket and the video.
If you have any questions, feel free to contact us.
https://shop.bitspower.com/index.php?route=product/product&path=419_421_427&product_id=8021
https://www.youtube.com/watch?v=rfYR75fppvY