I am wondering how I might seriously increase the GPU airflow on my tower case. The configuration right now is GPU1 - three open slots -- GPU 2 -- 2 open slot -- PSU. Forward of the GPUs is a rather solid looking metal storage rack. It sits between the front fan and the GPUs so it doesn't look like beefing up the front fan will be too effective. I could potentially try and mount a fan in the empty 5.25 in drive bay(s) or somehow onto the back of the case on the empty slots. Noise target is something comparable to 1 or 2 box fans - loud but tolerable. Cheers