The Hydra 5 Rev. B is a custom made open frame rack for 20 GPU-based Learning/Mining/Rendering servers. It supports ultra wide 3-slot graphics cards, larger E-ATX motherboards, and up to 5 power supplies! You can install an Asus B250 Mining Expert motherboard for 19 GPU mining, or an Asus Z10PE WS (dual LGA2011-v3) for dual CPU rendering. There is plenty of space at the front of the case for ten 120 x 120 x 38 mm thick server fans to blow air around the equipment.
Like all Hydra server cases, this one is properly built with thick gauge steel and aluminum so nothing is flimsy and everything fits precisely.