I used the command line option -acm, which turns on AMD compute mode.

My computer:

OS:                           Windows 7 64-bit edition
Graphic card:             XFX AMD Radeon RX580 GTS XXX Edition
graphic card driver:    Adrenalin 2020 Edition 20.8.1

GPU_Caps_Viewer reports:

  - Name: AMD Radeon RX 580
  - GPU codename: Polaris 20
  - Device ID: 1002-67DF
  - Subdevice ID: 1682-C580
  - Revision ID:   E7
  - Driver: Adrenalin 2020 20.8.1 (27.20.2001.13001)
  - Bus Id: 7
  - Shader cores: 2304
  - Texture units: 144
  - ROP units: 32
  - TDP: 185W
  - BIOS version: 015.050.002.001/113-58085SSD2-M80 (2019/08/20 02:23)
  - Memory size: 8192MB
  - Memory type: GDDR5
  - Memory bus width: 0-bit
  - GPU clock: 300 MHz, memory: 300 MHz, VDDC: 0.750V
  - GPU clock: 600 MHz, memory: 1000 MHz, VDDC: 0.769V
  - GPU clock: 900 MHz, memory: 2120 MHz, VDDC: 0.881V
  - GPU clock: 1020 MHz, memory: 2120 MHz, VDDC: 0.975V
  - GPU clock: 1040 MHz, memory: 2120 MHz, VDDC: 0.987V
  - GPU clock: 1060 MHz, memory: 2120 MHz, VDDC: 1.006V
  - GPU clock: 1080 MHz, memory: 2120 MHz, VDDC: 1.025V
  - GPU clock: 1110 MHz, memory: 2120 MHz, VDDC: 1.043V
  - Radeon PowerTune info:
    - GPU power limit: 120 % TDP
    - GPU power min: 50 % TDP
    - GPU power max: 150 % TDP

Please help me !!

My AMD RX 580 card only provides a hash rate of 10 Mh/s. It is a brand new card. Why is it slow ?

What hash rate does the AMD RX 580 provide for Ethereum using Phoenix Miner?