Bitcoin BLAKE2b Fork: SC Miner Test Guide

The Bitcoin BLAKE2b fork is not normal Bitcoin mining, but it has created a real test case for Blake2b-Sia ASIC owners. As of September 3, 2026, AlphaPool reports a live BLAKE2b pool with connected miners, active workers, and found blocks. That makes the topic more practical than a pure announcement, but it is still experimental infrastructure with wallet, liquidity, firmware, and payout risks.

For BT-Miners customers, the practical question is simple: should a Siacoin ASIC such as the Goldshell SC5 Pro II Siacoin Miner 14TH/s be pointed at a Bitcoin BLAKE2b fork pool? The answer is: only as a controlled test, not as a replacement for ordinary SC mining or as a guaranteed BTC income strategy.

What Changed With The Bitcoin BLAKE2b Fork

The fork materials describe a chain that moved proof of work from SHA256d to BLAKE2b at block 961640. The BTCB2 site says this chain is now on BLAKE2b, while the Bitcoin Knots release notes list BLAKE2b proof of work and a temporary 800 kWU block weight limit among the notable changes. Those are major consensus-level differences from the normal Bitcoin network.

The most important point for miners is that SHA-256 Bitcoin ASICs are not the relevant hardware category here. Antminer S19, S21, WhatsMiner M-series, and other normal Bitcoin miners are built for SHA-256. The BLAKE2b fork is targeting BLAKE2b-style mining work, which is why Blake2b-Sia hardware entered the discussion.

AlphaPool also makes the distinction explicit in its public disclaimer: the pool mines a community BLAKE2b hard-fork chain and is not affiliated with the Bitcoin network, Bitcoin Core, or Bitcoin Knots developers. In plain English, this is not the same as mining BTC on the Bitcoin mainnet.

AlphaPool Is Now Live, But Still Early

AlphaPool Blake2b stratum test checklist for ASIC miners

AlphaPool currently lists BLAKE2b stratum endpoints for the United States, Europe, and Singapore. The public API checked on September 3, 2026 showed live status, 2.5% fee, 28 blocks found, 23 miners, 21 workers, roughly 76.7 TH/s pool hashrate, and a synced node. The 24-hour hashrate endpoint showed a moving series ending near 78 TH/s.

That is a meaningful update from the earliest observation phase when the pool showed zero hashrate and no block history. It means some miners are already testing or mining. It does not mean the market is mature, liquid, or low risk.

Item checked	Current read	Miner takeaway
Pool status	Live and synced	A test can be run against public endpoints.
Fee model	PPLNS with 2.5% fee	Compare pool cost against expected block luck.
Blocks found	28 reported by API	There is block history, but still limited history.
Workers	21 workers reported by API	Some active participation exists.
Liquidity	No mature exchange market confirmed	Do not model mined coins like listed BTC.

Can Blake2b-Sia ASICs Connect?

AlphaPool says that Sia-family BLAKE2b ASICs are the relevant hardware category and lists examples such as Antminer A3, Innosilicon S11 SiaMaster, and Obelisk SC1. The shared test discussion also points to Goldshell SC-series hardware as likely compatible because these machines use the Blake2b-Sia mining family.

That does not remove the need for a live machine test. A miner can be the right algorithm family and still fail because of firmware behavior, stratum implementation, job format, rejected-share handling, DNS, pool latency, or payout-address validation. For that reason, a serious operator should test one miner before redirecting a fleet.

The Goldshell SC5 Pro II is the main BT-Miners product to consider for this experiment because it is a higher-hashrate Blake2b-Sia machine. BT-Miners lists it at 14 TH/s, 3300W, 235.71 J/T, Blake (2b-Sia)|SC, 180-280 VAC input voltage, and 13.1 kg. Those specifications make power planning more important than the novelty of the fork.

Safe Test Setup For SC5 Pro II Owners

Bitcoin BLAKE2b fork wallet isolation risk guide

A controlled test should be treated like firmware or pool QA, not like a finished investment decision. Save the current Siacoin pool configuration first. Then test one SC5 Pro II on a close AlphaPool endpoint, watch accepted shares, rejected shares, stale shares, miner temperature, pool-side worker visibility, and payout status.

The public AlphaPool connection pattern is standard: choose a regional stratum URL, use a payout address plus worker name, and use any password value such as x. The key caution is the payout address. The pool describes a bech32 bc1-style address from a fresh wallet dedicated to this chain. That address format can look familiar to Bitcoin users, but the coins are on the fork chain, not the ordinary Bitcoin network.

Test one miner first and record accepted-share rate for at least several hours.
Use a fresh fork-chain wallet only. Do not reuse a seed that contains real BTC.
Do not use a normal exchange BTC deposit address unless the exchange explicitly supports this fork.
Keep the original Siacoin pool settings so the miner can be switched back quickly.
Compare the result with normal SC mining using the BT-Miners ASIC miner profitability calculator.

Wallet Risk Is The Biggest Operational Issue

The fork pages and AlphaPool materials both point miners toward chain-specific wallet handling. The Bitcoin Knots release notes also warn that third-party wallets may require upgrades to remain compatible. This is the area where miners should be most conservative.

If a pool balance appears but the wallet cannot see or spend it, the hardware may be working while the payout workflow is still unusable for the miner. That is why wallet isolation matters. A fresh wallet dedicated to the fork chain is safer than importing an existing Bitcoin seed or sending payouts to a mainnet-only wallet.

Operators should also separate three different questions that are often mixed together: whether the miner accepts work, whether the pool credits shares, and whether the mined coin can be safely stored or sold. A successful stratum connection only answers the first two questions.

What This Means For Siacoin Miner Buyers

For miners who want a higher-throughput Blake2b-Sia test unit than smaller SC boxes, the iBeLink BM-S3+ Siacoin Miner 25Th/s is also a relevant BT-Miners option to evaluate. The product page lists it as a Siacoin / Blake2B miner, so it fits the same practical test logic as the SC5 Pro II: use it first for normal SC mining economics, then only point a controlled worker at the fork pool if you have a fresh fork wallet, understand that BTCB2 is not exchange-listed Bitcoin, and are prepared for high variance or zero recoverable value.

The fork can increase attention around Blake2b-Sia hardware, but it does not change the base investment case for a Siacoin miner. The normal use case for the SC5 Pro II is still SC mining. The experimental fork is an additional optional test path for operators who understand the risks.

That distinction matters when comparing machines in the BT-Miners Siacoin miner collection. A compact SC miner can be easier for home testing, while a 3300W SC5 Pro II needs industrial-style power, ventilation, noise control, and uptime monitoring. The right purchase decision should still be driven by electricity cost, cooling capacity, expected SC revenue, and resale risk.

For a deeper background on the algorithm separation between BTC news and SC miners, read the earlier BT-Miners article BTC News and Blake2b-Sia: What SC Miners Should Know. The current article is the follow-up: now that AlphaPool shows live pool activity, the issue becomes how to test safely and avoid confusing fork-chain coins with mainnet BTC.

Decision Framework For Miners

Use a staged decision rather than an all-in switch. The fork may become a short-term opportunity for idle Blake2b-Sia hashrate, but the risk profile is closer to experimental alt-chain mining than established Bitcoin mining.

Decision step	What to check	Stop if
Hardware fit	Miner supports Blake2b-Sia work and accepts shares.	Shares are rejected or firmware becomes unstable.
Wallet fit	Fresh fork-chain wallet can receive and track payouts.	The wallet cannot verify or spend received coins.
Pool fit	Pool shows worker hashrate, shares, blocks, and maturity.	Pool visibility or payout rules are unclear.
Economics	Power cost, uptime, and expected coin value make sense.	Revenue depends only on unsupported assumptions.
Scale	Small test remains stable before fleet expansion.	One miner does not run cleanly for a full test window.

The conclusion is practical: the Bitcoin BLAKE2b fork is worth watching for Blake2b-Sia ASIC owners, but it should be approached as a controlled experiment. If you are buying a Goldshell SC5 Pro II, buy it first for the Siacoin mining category, then treat BTCB2-style fork mining as an optional test scenario.

FAQ

Can a SC5 Pro II mine normal Bitcoin?

No. A SC5 Pro II is a Blake2b-Sia ASIC, not a SHA-256 Bitcoin ASIC. It cannot mine ordinary BTC on the Bitcoin mainnet.

Can a Blake2b-Sia miner test the Bitcoin BLAKE2b fork?

Possibly, but it must be tested on real pool endpoints with real accepted-share monitoring. Algorithm family compatibility does not guarantee every firmware and stratum combination will work.

Is BTCB2 the same as BTC?

No. Public pool materials describe it as a community BLAKE2b hard-fork chain. Treat mined coins, wallets, addresses, and liquidity as separate from normal Bitcoin unless a service explicitly supports the fork.

Which wallet should miners use for this fork test?

Use a fresh wallet dedicated to the fork chain. Do not import or reuse a seed that holds real BTC, and do not assume a normal exchange BTC deposit address supports fork-chain payouts.

Should miners switch all Siacoin hashrate to AlphaPool?

No. Start with one miner, confirm accepted shares and payout visibility, compare against normal SC mining, and only scale if the operational and economic case remains defensible.

Sources Checked

This article is educational and does not provide financial advice. Mining results change with pool luck, network difficulty, coin liquidity, wallet support, firmware behavior, electricity cost, cooling, uptime, taxes, shipping, and resale demand.