It's Friday 13th, time for something spooky:

https://hashfast.com/hashfast-announces-fastest-bitcoin-mining-chip-in-the-world/

500GH/s on a single chip.

And they expect to get more.

If they can get it up to 750GH/s (i.e. 3TH/s on 4 boards), they will have acheived now what KNC are promising 7 months from now