According to the [release notes of 2017.05](https://grml.org/changelogs/README-grml-2017.05/), the new baseline is the i686.
<ul>
- <li>Intel-compatible CPU (i586 or later, preferably Pentium class or higher)</li>
+ <li>Intel-compatible CPU (i686 or later, preferably Pentium class or higher; although some i586 processors e.g. the 'AMD Geode' are still supported)</li>
<li>>=256MB of RAM (>=512MB recommended)</p>