Build Advice Should I insert a front bottom fan or upper fan?

[Mr.Stork]

I have Corsair Carbide Spec - 04 (Amazon link) (Corsair Link). I already have one rear fan installed, and one upper fan on top of the case. I'll get another one if required. Now my question is, I think there are three fan slots in the front, I could be wrong about the lowest one in front (correct me). If there a third place, should I put a fan below the middle fan that I already have or it doesn't matter? Btw the airflow from the lower fan might get blocked by the Drive holder place, idk please see images of and suggest. Or put a fan above? Does the placement help cool CPU or GPU?

All fans are 120mm.

Thanks and I hope to get some answers soon!

 

[Lutfij]

The case accepts 3x120mm fans at the front. The lower most fan at the front will blow air towards the drive cage which will benefit your mechanical drives. If you lack mechanical drives you can have only two fans at the front with the lower most left unpopulated.

 

[Mr.Stork]

The case accepts 3x120mm fans at the front. The lower most fan at the front will blow air towards the drive cage which will benefit your mechanical drives. If you lack mechanical drives you can have only two fans at the front with the lower most left unpopulated.

I have drives, but I'm not concerned about cooling the drives, so you think the lower fan's airflow won't reach the GPU? so only the top fans will do?