I just tried to mount 25 mm fans under DTX board Asus ROG Crosshair VIII Impact with the Ncase V6 and it's good, no need to remove the soundcard.
Tested with Noctua NF-A12X25, just removed 1 corner pad.
What information do you want ? I have the Asus Impact DTX board and can tell the dimm.2 board feet with NH-C14S.
Just one problem :
the aluminum plate use as radiator for the ssd is putting too much pressure on the ssd and twists a bit. I will try with HCM PRO EVO.X V.2 radiators instead of...
I want to wait the M1 case for taking good thermals and benchmark, with NH14S and NH-U9S (i have both).
Just upload 2 bench @ Stock with this setup :
AMD Ryzen 3700x With NH-C14S @ Stock
Asus ROG Crosshair VIII Impact
G.Skill RipJaws 32 Go DDR4 3200 MHz CL14 @Stock
EVGA GeForce RTX 2080 SUPER...