Remember when Ethereum mining was actually a thing? I've been thinking about how the whole ecosystem shifted, and it's pretty wild how different things are now compared to just a few years ago.

So here's the thing - before September 2022, if you wanted to understand how is ethereum mined, it basically came down to computational power. Miners would use GPUs to solve complex math puzzles, race to validate transactions, and whoever got there first snagged ETH rewards plus transaction fees. The whole network ran on Proof of Work, which meant your graphics card was doing the heavy lifting. People were running rigs with RTX 3070s, AMD 5700 XTs, and all that hardware just to stay competitive.

The setup wasn't trivial either. You needed at least 4-6GB of VRAM on your GPU, decent CPU, solid power supply (usually 750W minimum), and enough electricity to keep everything running 24/7. Most miners joined pools like Ethermine or F2Pool to smooth out their earnings instead of going solo. The profitability equation was pretty straightforward - hash rate, electricity costs, hardware investment, ETH price, and network difficulty all factored in.

But then The Merge happened. On September 15, 2022, Ethereum completely switched gears. Mining became obsolete overnight. The network ditched Proof of Work and moved to Proof of Stake, which meant no more GPUs solving puzzles. Instead, you had validators locking up 32 ETH to secure the network. Energy consumption dropped by about 99.95% - from roughly 112 TWh annually to basically nothing. It was a massive transformation.

A lot of miners got caught off guard. Some pivoted to other GPU-mineable coins like Ravencoin or Ergo, but the rewards were way lower and more miners meant tighter margins. Others just sold their hardware and took their profits. The GPU market got flooded with used equipment, which actually drove prices down for regular consumers.

Now if you want to earn ETH, the game is completely different. You can stake 32 ETH through validators and get around 3-5% annual rewards passively. Or you just buy ETH directly through exchanges. There's no more mining in the traditional sense - that era is done.

It's honestly one of the biggest shifts in crypto infrastructure. The network is more energy efficient, more secure in some ways, and operates fundamentally differently. If you're curious about what mining actually was and how the whole transition played out, that's the cliff notes version. The Merge wasn't just an upgrade - it was a complete reimagining of how Ethereum secures itself.