TL;DR - Went from stock cooler to EKWB. OC went from +145 core and +795 mem. To +90 core and +760 mem. A decent difference in FPS and almost 400 pts in 3dMark TimeSpy.
First off, thank you to anyone who attempts to help with this. I just installed my first custom loop after using AiOs forever. The two products I used to complete this loop are these from EKWB.
https://www.ekwb.com/shop/ek-kit-p360
https://www.ekwb.com/shop/ek-quantum-vector-trio-rtx-2080-ti-d-rgb-nickel-plexi
https://us.msi.com/Graphics-card/GeForce-RTX-2080-Ti-GAMING-X-TRIO
So I set up my loop following their instructions provided very closely. After installing thermal pads and paste to my card I attached the block, then removed it to ensure proper contact between the two. After finding it to match descriptions of proper contact, and no physical damage to be seen, I re applied the waterblock with the provided screws and washers (I did follow the instructions to use the smallest screw in the bag of screws provided).
After leak testing I finally booted up 3dMark to get some details about my performance. The first big change was that the benchmark would not run until I changed my core voltage to +0, and my power limit back to only 100. These sliders had been maxed while the card was air cooled. Next the benchmark wouldn't run with my current OC settings of +145 to core and +795 to mem, and after some testing I arrived at the highest values that would work which ended up being +90 to core and +760 to mem.
I hands down love the cooling, my card hit 50C max during my repeated test attempts, I understand 3dMark may not be the most heat intensive application, but my card was low to mid 60s before. I just am baffled as to why I've lost performance when I keep hearing about how watercooling can help your card step up a few notches. I use a Samsung CRG9 as my monitor so every little bit of extra performance helps games look better in 32:9.
Thank you again for the help. I knew I would have some road bumps in my first custom loop endeavor, I just didn't expect this to be it.