When making my build it says that the CORSAIR ICUE 5000X RGB MID TOWER CASE (black version) can have up to 10 fans but only lets me select 9. Whereas the white version of the case allows me to select 10 fans. They are the exact same case.
Kinda depends on what you're selecting for example a CPU cooler can take up fan slots when it's mounted to the case depending on which one you select? Hard to give advise without seeing the build but I can guarantee that 9 or 10 fans is just silly and the computer will be stupidly loud