I have a new cooler for my FX-8350, the cooler I bought is a noctua NH-U9B, the fans are in a push pull config but it con only be mounter vertically mean it has to take air from the top of my case or the hot air from the gpu. I am wondering whether it is better to take hot air from the GPU or from the top of the case where there are no holes at all for ventilation. I do though have a fan at the front of me case which pulls air in to the gpu ?