Minimum hardware requirements to run a stake pool

The latest technical specifications and supported platforms can be found on the Cardano Node release page.

Currently the following specifications are recommended on Mainnet:

Servers: 1 for block producer node + at least 2 for relay nodes
CPU: An Intel or AMD x86 processor with two or more cores at 2GHz or faster
Memory: 24GB of RAM
Storage: 150GB of free storage (250GB recommended for future growth)
Operating system: 64-bit Linux (Ubuntu 18.04+, Mint 19.3+, Debian 10.3+)
Broadband: a good network connection with about 1 GB of bandwidth per hour on a public IP4 address
Air-gapped environment for key security

For testnet pools, some requirements are smaller: