Of course it is possible. But it is not a standard configuration and you will have to modify your pins_ramps.h file and make a couple of tweaks in Marlin_main.cpp
It is very difficult to offer suggestions when you have no idea about what is intended.
But remember... The RAMPS board only has 3 MOS-FET's. So if you want to control both fans independently of each other, you will need to do something special. Either add a MOS-FET driver, or put the fans in parallel.
You can get another MOS-FET driver board very cheaply here: [www.ebay.com]
It is very difficult to offer suggestions when you have no idea about what is intended.
But remember... The RAMPS board only has 3 MOS-FET's. So if you want to control both fans independently of each other, you will need to do something special. Either add a MOS-FET driver, or put the fans in parallel.
You can get another MOS-FET driver board very cheaply here: [www.ebay.com]