with a few hundred of gpus its possible

but for one normal person its to expensive
@nartur I understand you. feel happy by your new pool^^
yes but im asking for it is real or fake?
i cant imagine 450000 kh/s how a rig farm can do this?
it smells me its fake.
maybe he has his one server, with 30 cores and like a hole room with computers with each computer with 2-3 graphic card from the R9 amd in it.
it's possible but not for the normal miner.
he must has a computer shop or like a hole network (like in a school)