Corsair 780 fan advice

[DD_Crash]

I have a Corsair 780 case with 2 fans pulling air in at the front, a H100 AIO pulling air in on the top and an exhaust fan at the back. I am going to fit one fan at the bottom. Would it be best to install this as an exhaust fan?
Thanks in advance

 

[mickyflinn]

Fan at the bottom as an intake adding more cool air to the gpu .

 

[DD_Crash]

Thanks for that