commenced mining Ethereum in 2017 and also experimented with a variety of alt coins (PIRL, LUX, MUSICCOIN and many others). Below are the details of one of our first experimental mining configurations and how it was configured and setup to mine Ethereum with 30Mh/s GPUs @ 92 Watts of power. This experimental rig has now been decommissioned and we were able to produce 30.54 MH/s using 73 Watts of power as described on our RX 580 Ethereum Mining Guide.


Asus H370 Mining Master | RX 580 Ethereum Mining -

No PCIe connectors required on the H370 Mining Master Motherboard. The Asus B250 Mining Expert is a good alternative

THE H370 Mining Master Rig

Experimental Mining Rig For Up to 13 AMD Cards.

30.54 MH/S ON MSI ARMOR RX580 8GB (73 WATTS)

The experimental rig above (with 2 GPUs) has now been decommissioned, but was previously kept indoors as an experimental rig whilst the other 5 rigs are running 24/7 in the garage to keep them cool and to avoid the noise generated by the cooling fans. during winter, Its worth noting the cards can run comfortable at ~50 Degrees with their fan speed set to 50%, whilst in summer I have adjusted the fan speed to 75%. All rigs are attached to Wi-Fi power meters to enable me to terminate the mining operations from anywhere at any time if needed. My goals was to achieve a hash rate as close to 30 MH/s whilst keeping the power as close to 100 Watts for the RX 580 rigs.

Power Monitor | Ethereum Mining Watts -

These low cost power meters give you accurate readings on your rig power consumption in real time.


Using a Power Meter will tell you exactly how much power your rig is drawing. This includes the total power cost (MB, Components, GPUs etc.)

In the experimental rig there are only 2 cards running but this can easily be scaled up.

60.4 Mh/s at 328.3 Watts (includes entire rig running cost).

Total GPU cost 2 x $173.32 ($346)

12 cents / KWh

According to WhatToMine, we are on track for approximately $4.16 profit per day mining Ethereum with just these 2 cards.

Updated: 9 January 2021

WiFi Power Meter.JPG
Power Monitor | Ethereum Mining Watts -
Power Monitor | Ethereum Mining Watts -


These Wi-Fi power meters give you full control over the operation of your rig. Start and stop your rig simply by toggling the power on/off. Control your rigs using your phone.

Within the BIOS set APM AC Power Loss = Last State


The Ethereum Mining Rig Frame

For this experimental setup is a custom built frame from material sourced from a hardware store. The Motherboard is fixed to the wooden frame and the PSU is cradled by 2 corner brackets to allow the PSU to be lifted out easily if required. The PSU and MB positioning is easily adjusted and will need to be once additional cards are loaded onto the Rig. It's important to keep the PCIe ports to the center of the rig to allow the risers enough reach.


Consider the size of the frame, in most cases smaller is better so that you can transport / move it if you need to. The first frame built was too large and needed at least 2 people to move it, which quickly became impractical.

Ver 006C with SATA Power Connector | PCIe Riser | Ethereum Mining -

PCIe x16 The Risers

Ver 006C with SATA power connector

After some extensive research, the Ver 006C with SATA power connector has proven to work very well. Risers with the foam under padding are best, to avoid unnecessary and unintentional contact with the circuit board when handling the riser or when placed on the rig framing.

Secure the graphics card by adjusting the clip to ensure the GPU is firmly connected and cannot come loose during operation. Do not leave a riser connected to the PSU if you are performing maintenance on your rig. Partially powered devices will cause damage to your equipment. Unplug everything including removing the riser from connections from your motherboard if there is no graphics card connected and power appropriately when performing maintenance.

M.2 to PCI-E 4x 1x Slot Riser Card Adapter | Ethereum Mining -

M.2 to PCI-E 4x 1x Slot Riser Card Adapter

The ASUS Prime H270 Plus Motherboard like many motherboards today are often fitted with M.2 slots designed for an M.2 hard-drive. These adapters can be used to add additional GPUs to your rig where traditional PCIe slots are limited. The Motherboard BIOS may have settings to enable PCIe on M.2 (M.2_1 Configuration & M.2_2 Configuration).

Do not overload your PSU. Overloading your PSU will ultimately destroy the unit and may lead to damaged GPUs, Risers & Motherboard, and in some cases pose a significant fire risk.

Attach only 1 Riser per peripheral / SATA connector. Do not daisy chain your SATA connections to multiple risers.

SATA cables will supply ~54 - 60 Watts for the entire cable. Even though there may be multiple SATA connectors on a single cable, only connect 1 riser to the SATA adapter closest to the PSU to avoid overheating. Its important to check the PSU rails and understand the power output before connecting any risers to your PSU.

Molex will deliver anywhere between 50 and 130 Watts depending on the rail. Understand your PSU rails to avoid damage to your equipment and to prevent the risk of fire.

Motherboard BIOS Settings For Multiple GPU Rig - ASUS

To setup your ASUS 1151 Chipset Motherboard for mining you must set the following options. These options have proven stability and maintain your rig up-time.

  • Disable all ASPM (Active State Power Management) options

  • VT-d = Disabled

  • Above 4G Decoding = Enabled

  • DVMT Pre-Allocated = 96M

  • PEG Port Configuration -> PCIEX16_1 Link Speed = Gen3

  • PCI Express Configuration -> PCIe Speed = Gen3

  • Aggressive LPM Support = Disabled

  • HD Audio = Disabled

  • USB power delivery in Soft Off state (S5) = Disabled

  • Serial Port = Off

  • APM Configuration = All Disabled

  • Fast Boot = Disabled

  • CSM (Compatibility Support Module) -> Launch CSM = Enabled

  • Boot Device Control = UEFI and Legacy OPROM

  • Boot Option #1 = "Your Ethos USB Stick will appear here" (for me: SanDisk 14664MB)


Ethos has a great knowledge base to help you get started. My experimental rig has the following config set.

### /home/ethos/local.conf

###Ethereum Classic - SOLO Mining

maxgputemp 75

stratumproxy miner




flags --cl-global-work 8192 --farm-recheck 200

globalfan 50


###Overclocking & Under-Volting settings

###7fc29f is the name of the rig - yours will be different

###The adjustment below are specific to the MSI Radeon RX 580 Armor OC, 8GB GPU with One Click BIOS mods.

###01 Ellesmere RX 580 xxx-xxx-xxxx Micron

###03 Ellesmere RX 580 xxx-xxx-xxxx Micron


safevolt disabled

cor 7fc29f 1200 1200

mem 7fc29f 2140 2140

vlt 7fc29f 880 880

Some useful ethos commands to get you started.

$ helpme (will show you the most useful commands)

$ ethos-smi (will give you the details of all GPUs and their power usage)

$ r (will reboot your rig)

$ show miner (will display the miner log and you can check for network connectivity issues / DAG issues)

$ nano /home/ethos/local.conf (NANO is the default editor to allow you to edit your config files)

$ force-local (will for ethos to use your local config file. If you don't do this, your local.conf will be replaced by remote each reboot)

$ disallow (will prevent the miner from starting)

$ minestop (will stop the miner - your GPU fans will continue to spin but mining will stop)