So I am replacing the stock case fans that my pc came with (it was acquired long ago, pre built. don't judge I was young! I'm slowly replacing components.) Long story short I have a hot running gpu and a major reason is terrible airflow (opened the case, got 12 degrees cooler). I have 3 fan spots, 2 120mm and 1 140/120mm. Should I put a 120 or 140 in that variable spot? I will also be getting a drive bay cover that will give another fan spot (or I'll get a whole new case). I also need advice on fan direction. There are 3 drive bays behind the front mesh on top that are empty, meaning there's a spot with no airflow.
120mm: http://www.newegg.com/Product/Product.aspx?Item=N82E16835103192
140mm: http://www.newegg.com/Product/Product.aspx?Item=N82E16835709024
case: http://www.newegg.com/Product/Product.aspx?Item=N82E16811208040
So, Q 1: 120 or 140?
Q 2: fan directions (intake or exhaust)?
120mm: http://www.newegg.com/Product/Product.aspx?Item=N82E16835103192
140mm: http://www.newegg.com/Product/Product.aspx?Item=N82E16835709024
case: http://www.newegg.com/Product/Product.aspx?Item=N82E16811208040
So, Q 1: 120 or 140?
Q 2: fan directions (intake or exhaust)?