I have a Corsair Carbide Series® 300R Windowed Compact PC Gaming Case and the ASUS Z87-C Motherboard. I also have a 600w PSU. My case comes with two fans but I am replacing the front 140mm fan with two Corsair LED 140mm Fans for better cooling. I also might replace the back rear fan. Is my case, PSU, and motherboard enough for an extra fan? Also, would it be wise to use the old fans on the top fan mounts or side panel?