---
title: CPU speed atom
framework: quicktime-file-format
role: symbol
role_heading: Data field
path: quicktime-file-format/reference_movie_descriptor_atom/cpu_speed_atom
---

# CPU speed atom

A reference movie atom may contain an optional CPU speed atom.

## Overview

Overview Only one CPU speed atom can be present. See CPU speed atom ('rmcs') for more information.

## See Also

### Data fields

- [Size](quicktime-file-format/reference_movie_descriptor_atom/size.md)
- [Type](quicktime-file-format/reference_movie_descriptor_atom/type.md)
- [Data reference atom](quicktime-file-format/reference_movie_descriptor_atom/data_reference_atom.md)
- [Data rate atom](quicktime-file-format/reference_movie_descriptor_atom/data_rate_atom.md)
- [Version check atom](quicktime-file-format/reference_movie_descriptor_atom/version_check_atom.md)
- [Component detect atom](quicktime-file-format/reference_movie_descriptor_atom/component_detect_atom.md)
- [Quality atom](quicktime-file-format/reference_movie_descriptor_atom/quality_atom.md)