UPDATE:

We achieved 41Mh/s at 225W of power usage on Lyra2z today. The board operated for approximately 20 minutes before shutdown occurred. As reported by whitefire and others, the BMC disables the board when temperature exceeds configured shutdown temperatures. We were operating on a completely unmodified VCU-1525; it has no upgraded cooling or components like the BCU-1525 will have. We are confident enough in the hashrate now to report 40Mh/s as the shipped hashrate for lyra2z. There is still some room for some improvement and we may be able to achieve up to 60Mh/s.