I am actually mining with the VEGA FE using genoil's miner, I got 32-29Mhs at stock stetting, i haven't measured the power used, here is my link:
https://steemit.com/mining/@crazy/mining-like-a-scientist-i-am-the-first-person-in-the-world-mining-with-an-amd-radeon-vega-frontier-edition-29mh-s-at-ethereum

the heat makes a massive difference to the hashrate