SteamOS 3.7.20 NTSYNC Vs FSYNC: Is There Any Difference?

In this video we’ll compare NTSYNC Vs FSYNC in SteamOS 3.7.20 across 10 AAA/AA Games using Proton GE 10-32 Vs Proton 10.0-4 to see if there is any difference in performance, frame times or FPS.

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✅ What is NTSYNC? – https://fedoraproject.org/wiki/Changes/NTSYNC
✅ SteamOS 3.7.20 Patch Notes: https://steamcommunity.com/games/1675200/announcements/detail/502851820603836935

⚙️ How To Check NTSYNC is working Launch Command: PROTON_LOG=1 %command%
⚙️ How To Manually Apply NTSYNC Launch Command: PROTON_USE_NTSYNC=1 %command%

🎮 Steam Deck OLED
🕐 Tested: 12th March 2026
⚙️ SteamOS 3.7.20
🛠️ Proton GE 10-32 Vs Proton 10.0-4
📀 Steam Version Full Game
🎮 Post-Demo Content

After testing 10 games on SteamOS 3.7.20 with NTSYNC (Proton-GE 10-32) and FSYNC (Proton 10.0-4), I saw little to no performance differences across all games tested as expected.

Frame time may be slightly improved in games like Metaphor and Elden Ring, but overall the differences are very small and negligible at best.

Older games that use DirectX11, DirectX10 and below like older Call of Duty’s can benefit from NTSYNC, but as it currently stands modern titles show minimal differences.

⏱️ Timestamps ⏱️
00:00 – Elden Ring
00:29 – Spider-Man 2
00:47 – Red Dead Redemption 2
01:22 – Black Myth Wukong
02:02 – Resident Evil 9 Requiem
02:44 – Hogwarts Legacy
03:21 – Baldur’s Gate 3
04:00 – Cyberpunk 2077
04:35 – Metaphor ReFantazio
05:07 – No Rest For The Wicked

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Steam Deck OLED
SteamOS 3.7.20
4GB VRAM

Under section 107 of the Copyright Act 1976, allowance is made for “fair use” for purposes such as criticism, comment, news reporting, teaching, scholarship, education, and research.
No Games Are Included Or Added

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