Siacoin (SC) Mining Overview
Siacoin (SC) is the core cryptocurrency of the Sia decentralized storage platform, aiming to build an open, low-cost decentralized cloud storage network. Users can rent or sell storage space using Siacoin, while miners verify transactions and maintain network security and integrity through a Proof of Work (PoW) mechanism. Over time, Siacoin's mining ecosystem has undergone significant changes. Currently, only Application-Specific Integrated Circuit (ASIC) miners are supported for efficient mining, as Graphics Processing Unit (GPU) or Central Processing Unit (CPU) mining is no longer economically viable.
Siacoin Mining Fundamentals
Mining Algorithm and Consensus Mechanism
- Algorithm: Siacoin uses the Blake2b hashing algorithm.
- Consensus Mechanism: The Siacoin network operates through a Proof of Work (PoW) mechanism, where miners compete to package new blocks by calculating hash values and receive block rewards.
- Block Time: A new block is generated approximately every 600 seconds (10 minutes).
Hardware Requirements and Evolution
Early Siacoin mining supported GPUs, but with the advent and popularization of ASIC miners, the hashrate efficiency of GPU and CPU mining could no longer compete with ASICs. Currently, Siacoin mining has fully entered the ASIC era, and miners must use ASIC miners specifically designed for the Blake2b algorithm to participate effectively.
Block Rewards and Token Supply
Siacoin's block reward gradually decreases over time and will eventually stabilize at 30,000 SC per block. Siacoin has no maximum supply cap, but its inflation rate is predictable and gradually declining, aiming to incentivize miners to maintain network security through continuous block rewards.
Sia v2 Hard Fork
The Sia network activated the Sia v2 hard fork at block height 526,000 on June 6, 2025. This upgrade required all network participants (including users, host providers, wallets, exchanges, and mining pools) to update to software versions compatible with the new protocol to ensure smooth network operation and functional upgrades.
How to Mine Siacoin
Choosing the Right ASIC Miner
Siacoin mining requires specialized ASIC miners. Major manufacturers in the market currently include Goldshell and iBeLink. When choosing a miner, factors such as hashrate, power consumption, price, and payback period need to be considered comprehensively. Below are some examples of historical miner models (please note that these data are as of January 2024, and the latest models and performance may vary):
- Goldshell SC Lite: Hashrate approximately 4.4 TH/s, power consumption approximately 950W.
- Goldshell SC Box II: Hashrate approximately 1.9 TH/s, power consumption approximately 400W.
- Goldshell SC5 Pro: Hashrate approximately 11 TH/s, power consumption approximately 2820W.
After purchasing a miner, simple configuration is usually required, including connecting power and network cables, and setting the mining pool address and miner name in the miner management interface.
Choosing a Mining Pool
Joining a mining pool is a common way to mine Siacoin. Mining pools combine miners' hashrate to increase the probability of finding a block and distribute rewards based on contribution. When choosing a mining pool, factors such as fees, payment methods (e.g., PPS, PPLNS), payment threshold, and the degree of decentralization of the pool should be considered. Here are some mining pools that support Siacoin mining:
- F2Pool (鱼池): Supports Siacoin mining, offers a 3% PPS payment scheme, with a daily payment threshold of 100 SC.
- DxPool: Provides Siacoin mining services.
- Luxor: A Siacoin mining pool that contributes a portion of its profits to the Sia community.
- Nanopool: Has a relatively large number of active miners, contributing to network decentralization, with a 2% PPLNS fee.
- Antpool: Owned by Bitmain, controls approximately 5% of the network hashrate.
It is worth noting that Siamining.com was once the most popular Siacoin mining pool, at one point controlling over 55% of the network's hashrate (as of March 2023). This hashrate centralization raised concerns about the risk to network decentralization. Miners are generally advised to avoid using mining pools that control more than 25% of the network's hashrate to maintain healthy network decentralization.
Mining Environment Setup
ASIC miners typically require a 220-240V power supply and generate significant heat and noise. Therefore, miners need to prepare appropriate electrical infrastructure, efficient cooling and ventilation systems, and soundproofing measures to ensure stable miner operation and avoid disturbing the surrounding environment.
Mining Profitability and Risks
Profitability Considerations
Siacoin mining profitability is influenced by several factors, including:
- Electricity Cost: This is the largest expense in mining operations. Higher electricity costs reduce profit margins.
- Miner Efficiency: The miner's hashrate-to-power consumption ratio determines its energy efficiency.
- Siacoin Price: The market price of Siacoin directly affects the fiat value of mining rewards.
- Network Difficulty: Higher overall network hashrate leads to greater mining difficulty and a lower probability for individual miners to receive rewards.
As of January 2024, some Siacoin miners may face negative daily returns, meaning electricity costs could exceed mining revenue. Miners should use online profitability calculators, combined with their electricity costs and miner models, to conduct detailed profitability analysis.
Network Decentralization Risk
Excessive concentration of mining pool hashrate is one of the potential risks facing the Siacoin network. If a few mining pools control most of the network's hashrate, it could increase the risk of a 51% attack, thereby threatening network security. Miners should support a diversified mining pool ecosystem and avoid over-concentration in any single large mining pool.
Historical Controversies
In 2017, the Sia team, through its subsidiary Obelisk, produced its own ASIC miners to counter the potential centralization risk posed by companies like Bitmain secretly developing Blake2b algorithm ASIC miners. In 2018, the Sia team even implemented a hard fork to disable non-Obelisk miners, a move that sparked widespread controversy within the community, highlighting the complex relationship between decentralization and project control.
Acquiring and Trading Siacoin
In addition to mining, Siacoin can also be purchased on cryptocurrency exchanges. Siacoin (SC) can be traded on platforms such as Upbit, Binance, HTX, Poloniex, CoinW, Hibt, BYDFi, XT.COM, Gate, DigiFinex, BitKan, Kraken, MEXC, Bybit, and Crypto.com Exchange. Please verify the compliance and security of any platform yourself before conducting any transactions.
