What Is Ethash?
Deciphering Proof of Work Mining
When proof of work mining occurs, data from a block header is used as an input and is hashed repeatedly with a cryptographic hashing method.
This yields a fixed-length output that reflects the hash value.
Miners will hash variants of the input data by using a new sequence number each time the data is submitted into the process.
How Does It Work?
Ethash is a modified version that eliminates the computational cost that existed in its previous version, Dagger-Hashimoto.
The program makes use of a vast dataset that is produced regularly and gradually expands over time. It is small enough to fit in the VRAM of a contemporary GPU.
With Ethash, the hash value produced by the process must be less than a given threshold.
This is known as difficulty, and it entails the Ethereum network raising and lowering the threshold to manage the pace at which blocks are mined.
If the rate at which blocks are found rises, the network automatically increases the difficulty level, lowering the network threshold so that the number of valid hashes capable of being found lowers as well.
If the pace of discovered blocks falls, the network threshold rises, resulting in a greater number of accurate hash values that can be found.
Efficiency and Speed in Ethash Mining
The network generates one block every 12 seconds on average.
Miners frequently raise the memory clock frequency on their GPUs to obtain huge gains in Ethash hash rates.
To counterbalance the related heat production, power or temperature constraints, as well as manually-set high fan speeds, are occasionally found.
To achieve the most cost-effective mining farms, it’s usual to see custom-built PCs specified with six or more high-end GPUs for mining Ethereum, with little attention on the other components.