# CPU Power and Ledger Integrity

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*The longest chain not only serves as proof of the sequence of events witnessed, but proof that it came from the largest pool of CPU power.*

\- Satoshi Nakamoto, Bitcoin Whitepaper

This concept emphasizes that the integrity of the Bitcoin ledger is maintained **through the collective computational power of the network**.

At scale, **the capacity of nodes** to solve the difficult proof-of-work problem is crucial, as nodes must also keep pace with the rest of the network in downloading, validating, and storing all transactions occurring in real-time.

The hashing machinery used to solve proof-of-work effectively votes for **the most capable node**, **incentivizing operators to invest in the fastest and most efficient machines** to attract the most hash power. This dynamic ensures that **the network remains healthy**, as node operators are motivated to invest in superior infrastructure to enhance their capacity for validating transactions and maximizing fee revenue.


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