There is a bit over 9.6" to the rear of the second HDD cage.
Aigo...
As always, Silverstone gives up functional design for other factors, mainly appearance. It is a nice large case, built like a tank but that's about it. I wish they would consult with someone who knows how PCs function before they crank out their high-end designs. Really no excuse for lacks in style, construction or functionality at that price point. The Temjin 7 only does a really good job on two of the three...
If I were to buy a TJ07, I'd be buying two smaller PSUs instead of a 1kW unit and save a bunch O' bux. Ditto with a Stacker if I were to buy one. Nutz to buy that big of a PSU...
.bh.