Do you think your roms works with Powercolor r9 nano?
Yup, should work just fine!
Basically the only thing that's different is the sticker on the fan

Edit: Working on my Rom for my R9 390 Nitro's (Sapphire).. will update op as soon as i'm ready and tested it firmly

Greetings!
What is the model number of your Sapphire R9 390. If I buy it next time, I would like to get the same one.