The Evolution of Bitcoin Mining Hardware: CPU to ASIC

The ladder, in one view

Mining hardware climbed a four-rung ladder between 2009 and 2013. Ordinary computer processors first. Graphics processors second. Field-programmable gate arrays third. Application-specific integrated circuits fourth. Each rung did the same work faster than the rung below it, and each displaced the one before. The framework is uncontested history. The interesting parts are the boundaries, and only some boundaries have protocol dates.

A dated fact anchors the start. The first era paid 50 coins per block, and that rate ended at a specific block, 210000, reached on 28 November 2012 ^[3]. Whatever hardware did the work, the era’s pay ended when that block closed.

Rung one, processors, 2009 to the 2012 boundary

The opening years ran on ordinary processors. Anyone’s computer could enter the lottery, and many did. The work was cheap to do and cheap to join. The reward was large in coins and small in value. This era’s end is the protocol-dated one: block 210000 halved the subsidy and, with dedicated hardware arriving, general processors never held the field again ^[3].

Rung two, graphics cards

Graphics processors came next. They ran the block work far faster than general processors, and for a stretch they were the competitive edge. The rung matters to the history for what it established: the work rewards specialized silicon, and the network’s difficulty rule absorbs every improvement ^[1]. Faster hardware does not speed the chain. It raises the entry price.

Rung three, programmable chips

Field-programmable gate arrays followed. Chips whose logic could be reconfigured for the work, sharper than graphics cards, sharper still than processors. The rung was short. It proved the market would buy purpose-shaped hardware before purpose-built hardware existed. Consensus history dates this bridge era to the gap between graphics cards and the first dedicated chips, and this page carries no more precision than the record supports.

Rung four, ASICs, 2013 to now

Application-specific integrated circuits arrived in 2013. Chips built to do this work and nothing else. The first generation of that year reached the tens of gigahashes per second class, an uncontested detail of the era’s record. From that arrival, ASIC mining became the dominant method on the network.

One correction belongs to this rung, and it is this page’s own. The old version of this record stated ASIC dominance ran from 2013 to 2021, as though the era had closed. It has not. ASIC mining remains the dominant method today, and the honest end date is open ^[2]. A history page that closes an open era is describing its own writing date, not the hardware. The fix is stated here because quiet fixes teach nothing.

Why the ladder only climbs one way

The difficulty rule explains the ladder’s shape. As more mining power joins, the protocol retargets the work upward, holding the block cadence near ten minutes ^[1]. Every hardware generation raises the floor. The generation after it must clear a higher floor to matter at all. Nothing on the network gets faster for users. The ladder is a pricing-out machine, and each rung is the price of the previous one.

The same rule runs in reverse on value. Old hardware does not become sentimental. It becomes electricity cost without competitive return. That is why this page names no collector’s items and prices nothing.

The era you are in

The current era has a start date, 2013, and no end date. The subsidy side of miner income has crossed four halvings and now sits at 3.125 coins per block ^[2]. The hardware side sits on rung four, where it has sat for over a decade. Readers meeting a pitch that mining has entered some new post-ASIC era hold one check in hand: the documented record, which ends this page’s ladder on the same rung it reached in 2013. The check is cheap. The record is public. The block reads are public ^[3]. A claim about a new era that cannot point at a block, a chip, or a dated document is a claim this page’s method cannot carry.

How exact each date is

The boundaries are not equally dated, and a history page should say so. One boundary is protocol-exact: block 210000, 28 November 2012, with its timestamp verified identically by two independent block-data providers ^[3]. The rung transitions themselves are consensus history. Sharp in shape, softer at the edges, with no protocol event to stamp the day graphics cards gave way to programmable chips. This page keeps the two kinds apart. The first kind can be re-checked to the second. The second kind is the record this library inherited, labeled as such.

Where this page sits

The mining overview holds the issuance schedule this history rides on. The explainer holds the consensus mechanism. The mine page takes the practical question of entering today’s era, and the bitcoin hub is this family’s home root.