# Steam SteamOS 3.8.20 Beta

- Product: Steam (https://whatsnew.fyi/product/steam)
- Vendor: Valve
- Date: 2026-06-30
- Original notes: https://store.steampowered.com/news/app/1675200/view/701020348316911443
- Permalink: https://whatsnew.fyi/product/steam/releases/2026-06-30-steamos-3.8.20-beta
- Labels: Platforms: Desktop

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Updated Mesa graphics driver to a new major release with ray-tracing performance improvements and other performance and functionality improvements
- **changed** — Greatly improved VRAM management to improve performance and stability in cases where VRAM is limited
- **fixed** — Fixed issue with Steam streaming in Desktop Mode in fullscreen games
- **fixed** — Fixed graphics driver issue where the main menu in Sniper Elite 5 would not render correctly
- **fixed** — Fixed various issues with the SD Card reader on some Legion Go S models

This update is for the Steam Deck Beta and Preview channels, and includes new features that are still being tested. You can opt into this in Settings > System > System Update Channel.

_Note: This beta contains changes that were simultaneously released to SteamOS stable channel as _[3.8.12](https://steamcommunity.com/games/1675200/announcements/detail/701020348316911442)_, noted below_

**General**

- Updated Mesa graphics driver to a new major release, containing many ray-tracing performance improvements, as well as other performance and functionality improvements

- Greatly improved VRAM management, improving performance and stability in cases where VRAM is limited

**Fixed in 3.8.12**

- Fixed issue with Steam streaming in Desktop Mode in fullscreen games

- Fixed a graphics driver issue where the main menu in Sniper Elite 5 would not render correctly

- Fixed various issues with the SD Card reader on some Legion Go S models