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Modrinth · Minecraft modpack
OneClient (Modpack / Client) [ Optimized FPS / Vulkan ]
All in one modpack for OneClient by Polyfrost, the client for everyone. Optimized FPS / performance, world hosting, QoL features, in one place. Polydium Vulkan backend for 1.21.11 / 26.1.2
Quick answer
Which OneClient (Modpack / Client) [ Optimized FPS / Vulkan ] release should I use?
OneClient v2.0.512 (26.3) is a complete pack release for 26.3 with Fabric 0.20.1. Install it as its own launcher instance. If the creator publishes a separate server file, make sure it names this exact pack release. 135 mods in this pack file.
Pack setup
How should I set up OneClient (Modpack / Client) [ Optimized FPS / Vulkan ] for players and a server?
Use OneClient v2.0.512 (26.3) as the pack version. Install the pack as its own launcher instance. The creator’s listing does not name a separate server file, so check the release notes before setting up a dedicated server. Do not upload the ordinary client folder blindly.
A pack is a matched client and server setup, not one mod with an install-side label. Keep its release, loader, manifest and overrides together.
These numbers come from the pack file you chose. “Not labelled” means we don’t know which side it belongs on—not that it is safe everywhere. The file count is not a RAM estimate.
What are the server requirements for OneClient (Modpack / Client) [ Optimized FPS / Vulkan ]?
OneClient v2.0.512 (26.3). Change the pack release and its contents or setup may change too.
The selected pack release is OneClient v2.0.512 (26.3). That file is for Minecraft 26.3 with Fabric 0.20.1. It contains 135 mod projects. The creator’s listing does not name a separate server file. Check their notes before using one, and do not upload an ordinary client folder or rebuild the pack mod by mod. A file count cannot tell us the right RAM, CPU or storage; size the server for the players and world you actually run.
About this project
What kind of pack is OneClient (Modpack / Client) [ Optimized FPS / Vulkan ]?
OneClient
OneClient ships the most bleeding-edge mods, packaged with the best visuals out of any client, powered by OneConfig.
Performance
In the background, our competitors like Lunar Client and Feather/Dawn Client literally run an instance of Chromium in-game to power their GUIs.
Yes, clients actually are running Chrome IN YOUR MINECRAFT...
We use our own rendering library called PolyCompose (based on JetBrains Compose), resulting in drastically better visuals but also performance.
We package almost TWICE as many performance mods as Fabulously Optimized (27 vs 14 mods), meaning performance is significantly better in-game. And don't even get us started with Lunar/Feather...
User Interface
OneClient features a clean and sleek user interface, meticulously designed by actual designers. Optimized for looking good without sacrificing any easy of use. Supports themeing, so you can choose between what you prefer.



HUDs
We package our own HUD mods: EvergreenHUD and VanillaHUD, two of the best HUD mods ever created for Minecraft. On Hypixel SkyBlock, we support all the major SkyBlock mod HUDs, meaning all your favorite mods' HUDs show in one place.
Fully open-source
This should go without saying, but we are 100% open-source. We haven't had a single private repository on our GitHub since January 2026.
Project description from Modrinth.
Mods in OneClient v2.0.512 (26.3)
Open any mod on Modpacks.ch to check its files and dependencies.
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OneClient (Modpack / Client) [ Optimized FPS / Vulkan ] by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.2
1 loader build26.1.2
1 loader build1.21.11
1 loader build1.21.10
1 loader build1.21.1
1 loader buildMade local changes? Try them in a copied instance before touching a world you care about.
Recent files
OneClient (Modpack / Client) [ Optimized FPS / Vulkan ] versions and loaders
Looking for an older file? The official Modrinth project page is in Resources.