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Build 6 GPU RTX 3080 Ethereum Mining Rig In 2021

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RTX 3080 Ethereum Mining rig

It is such an amazing thing to build a cryptocurrency mining rig today. Ethereum, for the first time in 2 years, has crossed $1000 in value and is continuously on the rise.

If you are looking to build an RTX 3080 mining rig, then you are at the right place. In the next 5 – 10 mins, I can show you how you can build your next-generation mining rig.

But before we start – Is it too late to build a mining rig? or Is mining still profitable?

I guess not; Mining is still profitable.

Now that Bitcoin has crossed the $30k mark, it will be evident for you that you can start mining cryptocurrency. With the follow-up, Ethereum has reached yearly highs of over $1000 in value. Experts say that this is just the start of the bull trend. With Bitcoin making, ATH Ethereum has barely made a move as of yet. This means there is another uptrend for Ethereum coming soon.

Today, we are talking about GPU mining, i.e., mining with the help of graphics. Nowadays, you do not mine Bitcoin with a GPU. The only reason is Bitcoin Mining ASICS is more efficient than the GPUs.But, You can mine cryptocurrencies like Ethereum, Zcash, Ravencoin, UBIQ, etc.

The reason you should mine these with GPU cause few coins like Ethereum are ASIC resistant. So, you can only mine ethereum only with the help of graphics cards.

So, let’s talk about how you can start mining in 2021.

6 GPU RTX 3080 Ethereum Mining Rig

There are several things required for building a mining rig, such as –

Graphics CardNvidia RTX 3080
MotherboardAsus Prime Z390-P
PSUCorsair AX Series AX1600
SSDWestern Digital 1TB SSD
ProcessorIntel i5-8400 Processor
PCIe RiserUbit 6 Pack PCIe Riser
Mining FrameVedha Open Mining Frame
OSLinux / Windows

Combining this equipment, you will be able to start mining. So let us look into what all do you require to start mining cryptocurrency –

1. Nvidia RTX 3080

RTX 3080

Nvidia RTX 3080 is currently the best graphics card for mining cryptocurrency. It doesn’t only give the best hashrate but also consumes lesser electricity than other cards. Nvidia has improved its architecture and memory that ultimately performs better on the Ethash algorithm.

Nvidia RTX 3080 outputs 90MH/s on Ethash Algorithm. But, when overclocked, you can easily achieve 95-100 MH/s. The power consumed by the graphics is about 220W.

The graphics card is built upon Nvidia’s Ampere architecture, which provides better Ethash performance at low power. Although 220W is a lot of power, 90MH/s isn’t a small number.

As we are building 6 GPU RTX 3080 Mining rig, we would be requiring 6 GPU’s.

Combining which we would be generating – 90 * 6 = 540MH/s.

Total power consumed would be = 220 * 6 = 1320W.

How much profit would you generate with RTX 3080 mining Ethereum?

Ethereum Mined Per Day – 0.0071 ETH, i.e., $7.17

Power Consumed Per Day – ~$1

Profit Per Day –  $6.17

6 GPU Profit Per Day – 6.17 * 6 = $37.2

6 GPU Profit Per Month –  $1116

You can see that you would be earning more than a thousand dollars per month. Currently, the RTX 3080 card is very overly priced due to scarcity and scalpers. But even if you get your cards at the price of $1000, you will be able to recover your investment in about 8 months.

Once you recover your GPU & Mining rig cost, whatever you mine is yours to keep. Another advantage of this mining rig is that you can always sell your graphics card, and gamers are always ready to buy.

2. ASUS Prime Z390-P LGA1151 Mining Motherboard

Asus Z390-P mining Motherboard

Next, you will need a mining motherboard. There is a Zotac Mining motherboard, but there has been a stock crisis.

But Asus Prime Z390-P is an excellent alternative you could buy. The motherboard has an LGA1151 Socket, meaning it supports Intel Processor. So you will need an Intel 8th or 9th gen processor.

There is a 6 PCIe slot so that you can install all of your RTX 3080 graphics cards. Another good feature of this motherboard is you can always monitor the temperature of the monitor.

The motherboard support DDR4 RAM. The motherboard is decently priced and would have no problem in running your RTX 3080 mining rig.

Do not forget to buy an ATX power switch to turn on your mining rig.

3. Corsair AXi Series, AX1600i


The power supply is an essential part of the mining rig. If chosen wrong, could do more wrong.

PSU for mining rig would depend upon several GPU and their power consumption.

So let’s calculate –

6 (RTX 3080) * 220W (Power Consumption) = 1320W

So we require 1320W just to run the GPU and an extra 200-300W for Processor, RAM, Motherboard, SSD, etc.

So it is safer to choose 1600W PSU. You can choose Corsair AXi Series 1600i PSU or 1600W EVGA.

4. Western Digital 1TB WD Blue


Blockchain size is increasing day by day. Ethereum adds about ~75GB per year to its blockchain size.

For mining, it is required for you to download the whole blockchain and start mining from the current block. You will contribute towards all the future blocks.

You can also choose HDD, but they are slow and consume more power than SSD. SSD’s are not a cheaper way but definitely worth the price.

Western Digital 1TB would be enough for you to download the current ethereum blockchain and start mining.

5. Intel Core i5-8400 Desktop Processor

Intel i5 processor

The Asus Z390-P Motherboard support Intel 8th & 9th gen processors. That also includes a Pentium gold processor. But our bet this time would be to go with an i5 processor. Today while checking the prices, there is a mere difference between i3 & i5 prices.

So, Why not go with the better processor?

We would indeed be GPU mining the ethereum and not CPU mining. But, i5 can consistently run the mining rig.

The processor consumes about 65W.

6. Ubit 6 Pack Latest PCI-E Riser Express Cable

Mining PCIe Riser

There are 6 PCIe slots on the motherboard, but only two are PCIe 1X remaining 16X. So, you would need PCIe risers to attach all the RTX 3080 graphics card to the motherboard.

I also recommend you attach only a single GPU to the motherboard to connect your display. Rest all; you will connect to the riser. The riser is the best way you could your GPU mining rig cool.

We have also written a detailed guide on – How to choose a PCIe riser?

7. RXFSP 6/8 GPU Aluminum Stackable Open Air Mining Frame

mining frame

Mining Frames are there to arrange and keep the graphics cards cooler properly. There are several GPU mining you can choose from, but this particular one can be the best.

You can also save on not buying a mining frame but by building the frame at home. All you will require are few aluminum rods from which you can build an open mining frame. Also, make sure that you keep sufficient space between the graphics card, and additional fans could keep the 6 GPU rig cool.

8. OS

You could go here with two options—the free one, Linux & the paid one, Windows 10.

All the mining software is available on Windows & Linux. Suppose you have never used Linux. I advise you to use Windows 10 as your mining OS. It is also easier to overclock the graphics card with Windows rather than Linux.


There are several ways you can be profitable. Ethereum price is just taking off. Our prediction lies Eth would be above $5000 in 2021.

You can always hold your Ethereum and sell it when in profit. I have always been holding my Ethereum, only withdraw them to pay the electricity cost.

This was our guide on how you can build 6 GPU RTX 3080 Mining Rig.

If you have any doubt, you can put them down below in the comment, and I will be able to help you out.

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3 days ago

and what about the RAM?

3 days ago

What would you reccomend if I want to put 12 RTX 3080s?

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