Everything worked fantastic, I bought extra parts that ended up not being needed (fan splitter, extra velcro straps, usb2 header mounts)
The most challenging part I'd say was deciding which fan header approach to use. The motherboard options? or the H150i options?
the H150i comes with 3 fan connectors. I connected the 3 front RGB fans to this and mounted the radiator behind them.
I connected the H150i fan header to the CPU_FAN on the ASUS board per the H150i manual. There was an AIO port on the ASUS board but I went with Corsair (and their forum) recommendations. I did try the AIO_PORT however the motherboard complained no CPU_FAN detected, so per the Corsair instructions I left it on the CPU_PORT.
The three additional fans that came with the AIO I used as exhaust fans back, top and top front These fans are connected to CHA_FAN1 and CHA_FAN2 and CHA_FAN3 respectively. CHA_FAN3 I set to be very low and quiet to not create a negative pressure situation. It seems to be working very well.
Plenty of parts left over, screws, cables, tie wraps.
I also removed the 3.5" drive mount under the chassis to enable more room for cable management.
The seasonic PSU I installed fan UP per their manual.
Cinebench20 score was 8694 and CPU temp was 75c running on Windows 10 Pro for Workstations. I included 3 screencaps. Before, During and After so you can see the results.
3dMark Time Spy: https://www.3dmark.com/3dm/43240200?
Some post build tips.
Update the bios before doing anything using the USB port. https://www.asus.com/us/Motherboards/ROG-Crosshair-VIII-Hero-WI-FI/HelpDesk_BIOS/ Special note on the BIOS. The Asus Renamer called it C8HW.CAP and I read to call it C8HWIFI.CAP. I tried it with just the W and it didn't work. I also reformatted the USB stuck and put both and that did it. So it was either the reformat or the WIFI extension.
Disconnect the SATA drive and install your OS to the M2 drive, once OS is installed, re-connect the SATA drive. Windows likes to default to this drive and it is in fact listed as Drive 1.
I had to go into the BIOS to the extreme tweakers section and enable the industry standard settings for OC (I am not really Overclocking) but I did this to get my memory timings to 3600Mhz properly. By default I think it was 23xx or 26xx.
I tried to get bluetooth working but signal was terrible. Turns out you NEED the antenna included in the package, its not just for WIFI its also for bluetooth. So make sure to plug that in if you use bluetooth.
There is now an Asus plugin for iCUE: https://forum.corsair.com/v3/showthread.php?t=192965
1/26 update. I ended up returning the EVGA card. I was having some odd issues with it during gaming. All of a sudden the game would go choppy. And these games weren't demanding (rocket league) I returned it for an Asus ROG Strix RTX 2070 Super O8G which was about 150-170$ more than the EVGA. I felt this was worth it as 1. it supports SLI/NVLink, 2. I want this system to last a long time.