Using Wattman, your values may have to be tweaked depending on the silicone lottery:

Memory: 2200mhz (overclocked), 975mv (underclocked)
Power Limit: +15%

This will draw 825w from the wall with 3 cards.

Stock for these cards are:

Memory: 2000mhz, 1000mv
Power Limit: 0

In the Claymore Miner config.txt:

-ethi 8
-dcri 60

I left the Core clock at stock which is defaulted to 1266 or 1288 (XFX version)

More can be done with tweaking the Core Clock, but my 850w power supply was already at 825w with 3 cards and motherboard/fans.

Installing another power supply for 3 more cards will let me tweak the numbers some more.

With the settings above, I was able to get:

ETH/ETC: 27 Mh/s (26 Mh/s on one of the cards)
DCR: 810 Mh/s (790 Mh/s on one of the cards)

Heat and Fans:

Max: 80 C
Target: 75 C

This build deals with setting up Windows 10 to mine Ethereum and Decred, using the RX 480 GPU.

Install Windows 10 x64
—-
Install the latest AMD Radeon Crimson Drivers

http://support.amd.com/en-us/download/desktop?os=Windows+10+-+64

Crimson Edition 16.7.3 (Main installer, run this.)

After Crimson is installed, then do an update within Crimson. You will then be at “Crimson Edition 16.8.3” (or later)
—-
Install AwesomeMiner

http://www.awesomeminer.com/

—-
Configure Claymore ETH/DCR

New Miner Wizard
—-
Example of config.txt for mining ETC (Ethereum Classic)

-r 1
-ethi 8
-dcri 60

-etha 0
-mode 0

-gser 2

### ETC ########################################
-epool us1-etc.ethermine.org:4444
-ewal 0xBAf5706B333F709211Ab5A2A5669970A55385934.YourMinerName
-esm 0
-epsw x
-allpools 1
-allcoins 1

### DCR ########################################
-dpool stratum+tcp://dcr.suprnova.cc:2252
-dwal YourUserName.YourMinerName
-dpsw YourPassword

Example of config.txt for mining ETH (Ethereum)

-r 1
-ethi 8
-dcri 60

-etha 0
-mode 0

-gser 2

### ETH ########################################
-epool us1.ethermine.org:4444
-ewal 0x7563A2D88F2151B659F22FAd213E3A0E6fedE943.YourMinerName
-esm 0
-epsw x
-allpools 1
-allcoins 1

### DCR ########################################
-dpool stratum+tcp://dcr.suprnova.cc:2252
-dwal YourUserName.YourMinerName
-dpsw YourPassword

Example of epools.txt

POOL: etc-eu.suprnova.cc:3333, PSW: YourPassword, WORKER: YourUser.YourMiner, ESM: 0, ALLPOOLS: 1
POOL: us1.ethermine.org:4444, PSW: YourPassword, WORKER: 0x57f57167a82da3de4e69de73d1bc9c731cdcbaf8.YourMiner, ESM: 0, ALLPOOLS: 1
POOL: us1.ethpool.org:3333, PSW: YourPassword, WORKER: 0x57f57167a82da3de4e69de73d1bc9c731cdcbaf8.YourMiner, ESM: 0, ALLPOOLS: 1

Example of dpools.txt

POOL: dcr.suprnova.cc:2252, PSW: YourPassword, WORKER: YourUser.YourMiner, ESM: 0, ALLPOOLS: 1
POOL: dcr.coinmine.pl:2222, PSW: YourPassword, WORKER: YourUser.YourMiner, ESM: 0, ALLPOOLS: 1
POOL: dcr.pool.mn:4722, PSW: YourPassword, WORKER: YourUser.YourMiner, ESM: 0, ALLPOOLS: 1

—-
How to reboot straight into mining:

Setup Autologin In Windows.

Lock after login:
rundll32.exe user32.dll,LockWorkStation

Set Awesome Miner to start on reboot.
Set your managed miner to start on reboot.
—-

Other Software you may want to install:
—-
Install Chrome
—-
Install Notepad++
https://notepad-plus-plus.org/
—-
Install TortoiseSVN
https://tortoisesvn.net/downloads.html
—-

Other Settings you may want to adjust:

Allow Remote Access
Power Options
    Turn off display: Never
    Put Computer to sleep: Never
Auto login: netplwiz
Windows Folder defaults:
    Unhide known extensions
    Unhide system folders

Never get stuck after a windows crash. Run this as administrator:

bcdedit /set {current} bootstatuspolicy ignoreallfailures

Remove the popup after a crash

gpedit.msc

Navigate to:
Computer Configuration/Administrative Templates/Windows Components/Windows Error Reporting

Double click on "Prevent display of the user interface for critical errors"

Set to Enabled