I received my Sapphire RX 480 Nitro+ (4GB) GPUs yesterday. Is there also a ROM that I can use?
Without any modification I get ~22MH/s while mining ETH.
You can easily mod it yourself a little bit +2to4mhz. Save your bios rom with Atiflash and open it with PolarisBiosEditor. In the TIMING section copy 1500mhz strap(long code) and replace 1650, 1725, 2000mhz straps. Save and write new bios.
Ok, I will try that later, thank you. Is there a thread/website listing good settings for GPUs so that I do not have to test all settings?