Look at the picture:

Forgive my ignorance, but the algo nist5 is not resistant to ASIC?
I think 5GH/s is enough for GPU's ... even if they were R9 280x with 7 mh/s would need more than 700 GPU's to total 5GH/s
I'm probably wrong but it seems to be a miner ASIC u.u
So I am not the only one who is thinking about it. Price of the whole mining beast together with other components necesary, and the power consumption. So I think they found a way how to mine these coins with asics.