It's called mining hack, lol. But with $30 seems like too expensive (Amazon price), your cost looks better, my DIY wood rack costly around $15.
-IMG-
I love those saphires, I have 2 580 8gbs in my regular pc, I mine with them, my best cards by far.
Aha, but that's not my favorite. R9 295X2 (middle one) is my favorite. Power hungry, but stronger.
That's my old rig before I'm moving to my new place.