Skip ECC RAM at your own risk

Not mandatory, but you’d have to be either lucky or reckless to run without it. No one is going to slash you for a single bit flip, but memory errors can cause missed attestations, invalid blocks, or even accidental equivocation—any of which can lead to real penalties.

The risk is small for a home validator on a modern system. Consumer DDR5 has some on-die ECC, but it’s not full error correction. If you’re validating serious money, the price difference between ECC and non-ECC is trivial compared to the cost of a penalty event. Solana and Ethereum both punish unreliability—missed votes, wrong proposals—and memory errors are a quiet way to trigger that.

I’ve seen people run years without issues on non-ECC. I’ve also seen a single bad stick take down a validator at the worst possible moment. The math is simple: ECC RAM costs maybe $50-100 more. A single slashing event (or even a week of inactivity leak) can cost way more than that. Don’t save pennies on the thing keeping your node honest.

Future You does not want to explain to a governance forum why you lost rewards to save sixty bucks.