What Is Ethereum PoW and How Does It Work?

The Origins of Ethereum PoW

Before September 15, 2022, Ethereum operated on a Proof of Work (PoW) consensus mechanism, much like Bitcoin. This system required miners to use computational power to solve complex mathematical problems, validating transactions and creating new blocks on the blockchain.

On September 15, 2022, however, a landmark event in blockchain history took place: Ethereum officially transitioned from PoW to a Proof of Stake (PoS) consensus mechanism through an upgrade known as "The Merge." This shift meant that, instead of relying on mining equipment, validators now only needed to stake their ETH on the network to participate in consensus.

After Ethereum moved to PoS, all previous mining equipment could no longer mine ETH, which dealt a major blow to the incomes of miners worldwide. To protest this change and preserve mining-based earnings, a group of miners—primarily from China—launched Ethereum PoW, a forked version of the original Ethereum network.

What Is Ethereum PoW?

Ethereum PoW (ETHW) is a blockchain forked from the Ethereum network at the point of its switch to PoS. The main feature of ETHW is that it retains all technical parameters and historical data from the original Ethereum blockchain, but continues to operate using the PoW consensus mechanism instead of moving to PoS.

With the official launch of Ethereum PoW, the Ethereum ecosystem split into two parallel chains:

• Main Ethereum Network: Uses PoS with ETH as its native coin, widely supported by both the community and developers
• Ethereum PoW Network: Continues using the PoW mechanism, introducing a new coin called ETHW

Significantly, everyone holding ETH at the time of the hard fork received an airdrop of ETHW in a one-to-one ratio with their ETH balance. For example, if you held 10 ETH before The Merge, you would receive 10 ETHW at no cost.

Challenges Facing Ethereum PoW

Although created to keep mining alive, Ethereum PoW encountered several serious challenges right from its inception:

Liquidity limitations: Unlike the main Ethereum network, which is listed on most major exchanges, ETHW is only available on a handful of platforms. This results in much lower liquidity, making it harder for users to trade or transact in ETHW.

Lack of ecosystem support: Major DeFi protocols and oracle services, such as Chainlink, have publicly declared they do not support Ethereum PoW. This limits the ability of many decentralized applications (DApps) to function on ETHW, greatly reducing the blockchain’s practical value.

Technical issues with Chain ID: ETHW initially adopted Chain ID 10001, already in use by a Bitcoin Cash testnet. This overlap caused compatibility problems with popular wallets like MetaMask, making network access more difficult for users.

Security risks: As a new network with a much lower hashrate than the original Ethereum, ETHW is more vulnerable to 51% attacks, posing significant security risks for users and investors.

How Ethereum PoW Operates

Ethereum PoW runs on the Proof of Work consensus mechanism, just like Bitcoin. In this system, miners use their computers’ processing power to solve complex cryptographic puzzles.

The process works as follows:

1. Transaction validation: When a user initiates a transaction, miners gather these transactions into a new block.

2. Solving cryptographic puzzles: Miners compete to find the correct hash for the new block, trying millions of possible calculations.

3. Creating new blocks: The miner who finds the correct solution first adds the block to the blockchain and receives a reward.

4. Receiving rewards: In exchange for their effort and energy costs, successful miners are awarded new ETHW coins (block reward) plus transaction fees from the block’s transactions.

This mechanism secures and decentralizes the network, as a would-be attacker would need to control over 51% of the total network computing power to succeed.

How to Acquire ETHW Coins

If you’re interested in acquiring ETHW, there are three primary methods:

Receive a free airdrop: This simple method is only available to those who held ETH before the hard fork. You receive ETHW at a 1:1 ratio to your ETH holdings. For example, if you owned 5 ETH, you would receive 5 ETHW.

Buy on an exchange: You can purchase ETHW on centralized exchanges that support the coin. While not as widely listed as ETH, ETHW is available on several reputable platforms. This method suits investors who want exposure to ETHW without holding ETH beforehand.

Mining: The most traditional—but capital-intensive—method. You’ll need to invest in specialized mining rigs with high-performance GPUs, as well as cover significant electricity costs. If you already own Ethereum mining equipment, you can repurpose it for ETHW mining.

Secure Storage Options for Ethereum PoW

Choosing the right way to store ETHW is essential for asset security. Here are the common wallet types and their pros and cons:

Hot wallet: These wallets are always online, typically as exchange wallets. They offer convenience for quick trades, but carry greater security risks due to their internet exposure. Hot wallets are best for frequent traders who only store small amounts of ETHW.

Hardware wallet: These dedicated physical devices keep your private keys offline. Hardware wallets like the Ledger Nano S provide the highest security since private keys never leave the device. This is the best choice for long-term storage of large ETHW holdings.

Software wallet: Installed on your computer or phone, these wallets give you full control over your private keys. Software wallets balance security and convenience, making them ideal for experienced users.

Mobile wallet: Designed for users who need access on the go and can’t always use a computer. Mobile wallets are convenient but require strong phone security.

Paper wallet: This traditional method involves printing your public and private keys as QR codes or character strings on paper. Fully offline and safe from hacking, paper wallets are vulnerable to physical damage and are less user-friendly.

Step-by-Step Guide to Buying Ethereum PoW

If you want to buy ETHW, follow these steps for a safe and effective transaction:

Step 1 – Choose an exchange: Research and pick a reputable exchange that supports ETHW. Consider trading fees, liquidity, security, and community feedback.

Step 2 – Register an account: Sign up on your chosen exchange with your email and a strong password. Most platforms require email verification before proceeding.

Step 3 – Complete identity verification (KYC): Finish identity verification as required by the exchange. This usually involves submitting an ID and sometimes a selfie. The process can take minutes or days, depending on the platform.

Step 4 – Deposit funds: Fund your account using supported methods such as bank transfer, credit card, or a crypto transfer from another wallet.

Step 5 – Find ETHW trading pairs: Go to the trading section and look for ETHW trading pairs (e.g., ETHW/USDT or ETHW/BTC) that match your deposited currency.

Step 6 – Place a buy order: Enter the amount of ETHW you want to buy and confirm. Choose either a market order (buy at current price) or a limit order (set your price).

Step 7 – Withdraw to your personal wallet: Once purchased, withdraw ETHW to your personal wallet for maximum security, especially for long-term holding.

The Future of Ethereum PoW and Its Long-Term Challenges

The future of Ethereum PoW faces key questions about sustainability and competitiveness in the rapidly evolving blockchain industry.

Energy consumption issues: PoW inherently requires miners to perform millions of hash calculations for each block, leading to massive electricity usage. Notably, all the energy used by unsuccessful miners is wasted, which negatively impacts the environment.

Comparison with PoS: While ETHW continues to attract miners looking to sustain mining, Ethereum’s PoS mechanism offers tremendous energy efficiency advantages. PoS uses up to 99.95% less energy than PoW and enables the network to scale efficiently, with faster transaction speeds and lower fees.

Long-term outlook: As the world shifts toward environmentally friendly and energy-efficient blockchain solutions, ETHW may struggle to attract developers and new projects. The lack of support from the DeFi ecosystem and major protocols is another major barrier to long-term growth.

Community and market positioning: Even so, ETHW could carve out its own niche if the mining community continues to support and build unique applications. ETHW’s success will depend on its ability to deliver distinct value and attract users, rather than simply being a replica of Ethereum.

FAQ

What is Ethereum PoW? How does it differ from Proof of Stake (PoS)?

Ethereum PoW uses computational power to validate transactions and create new blocks. PoS, by contrast, selects validators based on staked capital. PoW consumes more energy than PoS but is often considered more secure in the early stages.

How does Ethereum PoW work? What’s the mining process?

Ethereum PoW uses a Proof of Work system where miners solve complex cryptographic puzzles to validate transactions and add new blocks to the blockchain. The first miner to solve the puzzle gets the reward.

Why did Ethereum switch from PoW to PoS? How does this affect miners?

Ethereum adopted PoS to cut energy use by 99.9% and boost efficiency. Miners can no longer earn block rewards, but PoS introduces staking opportunities with potentially higher yields.

What equipment do you need to mine Ethereum PoW? What are the costs and potential profits?

Mining Ethereum PoW requires dedicated ASICs or high-performance GPUs. Hardware and electricity costs are substantial, but profits depend on ETHW price, power costs, and competition. With quality equipment in a favorable market, mining can be profitable.

How much energy does Ethereum PoW use? Does it impact the environment?

Ethereum PoW consumes about 45 terawatt-hours of electricity annually, causing significant environmental impact due to high energy demand. Ethereum has since transitioned to PoS, cutting energy use by up to 99.9%.

How can I participate in mining Ethereum PoW? Is solo mining or pool mining better?

Pool mining is more efficient than solo mining for Ethereum PoW. Mining pools offer shared resources, lower costs, and a higher probability of consistent rewards. Small-scale miners should choose pool mining for more stable returns.