7970 / 280x does 16Mh/s on ETH now
In fact of the matter, Claymore's miner can mine at 22 Mh/s now on 7950/70.
Earlier I've written analogously post but even Claymore did not notice it.
But it's repeated again and again. And not only for ETH it has higher hashrate for SIA.
It's 6x7950 rig today:

You aren't mining ETH you are mining EXP or some other Dagger Algo coin. Something rented hash on Nicehash and pointed it towards that coin.