[[File:Atxscale.svg|thumb|ATX motherboard size comparison; rear is on left.
thumb|ATX motherboard size comparison; rear is on left.
thumb|FlexATX PSU FlexATX is a motherboard form factor derived from ATX. The specification was released in 1999 by Intel as an addendum to the microATX specification. It uses a subset of the motherboard mounting holes required for microATX and the same I/O plate system as ATX and microATX.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).