I was wondering if anyone has any experience running a Tower PC on it's side. The reason I'm curious is due to the set up of my graphic cards. I have two 7870 in crossfire and with them in a vertical position the heat raises upward and by doing so the heat from one GPU hits the other GPU. So I thougt why not rest my Tower on it's side so the GPU heat travels upward. This would also put less strain on the heat sink which is a fatty hyper 212. My only fear is hard drive resting side ways, I don't care about Opitcal drives, dead technology in my opinion. I know all the case fans will need to be reconfigured for a horizontal postion, I know how to set that up so none issue. I just want to know if the hard drive will have a hire chance of failing.