If its any help, It might not be, I've thrown loads of modules at my 2x uZeus Power modules with the standard power bricks and they perform admirably.
I was considering selling them as I upgrade my Konstantlab setup but I'll probably keep them for later skiff or small case builds cos they do take a lot of sh!t without complaining. :)
Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.