Try2 has the voltages of a normal 470, non mining edition. I have a few of them so I changed the voltages to the ROM you sent me to match the other ones and moded the timing to ubermix.
So I tried to flash try1 and ATIFlash says "Cannot erase ROM".
Anyway, I now used PBE one-click on 193398.rom and flashed it.
On 1150/1950 it does 27Mh/s