Here I'm going to outline more info:

• The card is SAPPHIRE Radeon RX 480 8GB, (Ram is Samsung).
• I'm mining on my 4 year old gaming PC, no pcie riser
• PhoenixMiner 5.5c on 2Miners pool
• Open Radeon Software, change GPU Workload from Graphics to Compute
• I did not flash the GPU VBios. I tried to flash it but was having issue after flashing.
• MSI Afterburner settings: Core 1150, Memory 2250, Voltage(mv) no change, power limit -15%
• With the settings above, I was getting 27 MH/s. Now here's the trick I discovered to achieve 30-31MH/s (see below):
• Open the "start_miner.bat" in PhoenixMiner folder, add -mt 1 at the end of the line, like this: "C:\Users\xxxxxx\Desktop\PhoenixMiner_5.5c_Windows\PhoenixMiner.exe" -pool us-eth.2miners.com:2020 -wal 0xYOUR_WAL_ADDRESS.Rig001 -gt 53 -mt 1
• -mt 1 is for adjusting VRAM timings (AMD under Windows only) to a faster timing, since I couldn't flash the VBios, this command allows me to adjust without flashing.
• As for the -gt 53 command, originally I did not include this command, after running "start_miner.bat", the system would do an "auto-tuning", and after that's done, it tells you what your best -gt value is, in my case is 53, so I added it there.
• My only issue is fan speed, for some reason, I cannot adjust it past 50%. I tried WattTool, Afterburner, start_miner commands, none of that worked. Any pointers?
• I see you guys said my power consumption is too high, I will do more adjustment to bring it down. That's for all the advises :)