Dear Aaron,
Would you please send us the PCB photo of MSI GeForce RTX 3080 Ti Ventus 3X 12G OC?
Mostly the water block for MSI GeForce RTX 3090 Gaming Trio should be compatible with 3080 Ti.
We will check and compare the PCB photos.
Here is our email address, thank you.
shopservice@bitspower.com.tw