Tier1Timer - Windows Timer Resolution Optimizer

Tier1Timer is a free, lightweight Windows utility that lowers your system timer resolution to 0.5 ms for more consistent frame pacing and lower input latency in competitive games like CS2, Valorant, Fortnite, Apex Legends, and Overwatch 2.

By default Windows ticks at ~64 Hz (15.6 ms intervals), so any Sleep(1) call your games and drivers make can overshoot by up to 15 ms. Tier1Timer pushes the interrupt rate to ~2000 Hz so your inputs register faster and frames arrive on time.

Features

• Live dashboard — current / min / max resolution with one-click 0.5, 1.0, 2.0 ms presets and a custom slider.
• Auto Mode — detects running games every 500 ms, applies your per-game resolution, and reverts on exit.
• Game profiles — pre-configured for CS2, Valorant, Fortnite, Apex Legends, Overwatch 2, and more. Fully editable.
• Latency benchmark — measures real Sleep(1ms) accuracy so you can verify the improvement on your own hardware.
• Safety watchdog — always restores the default resolution, even on a crash. No kernel driver, no code injection.
• System tray — minimizes to tray with quick presets; tooltip shows the active resolution at a glance.

Download & full guide

Official download, checksum, and setup walkthrough: tier1settings.com/tier1timer

Background reading: The Ultimate Guide to Timer Resolution for Gaming