# ClockRes - Sysinternals | Microsoft Learn

Title: ClockRes v2.1 — Summary Author: Mark Russinovich Published: July 4, 2016

Summary

* ClockRes is a small Sysinternals utility that queries the system clock resolution (the maximum timer resolution an application can obtain) using the Windows API function GetSystemTimeAdjustment.
* The app displays the result of that query so you can see the current clock/timer resolution on your system.
* Supported platforms:
  * Client: Windows Vista and higher
  * Server: Windows Server 2008 and higher
  * Nano Server: 2016 and higher
* Download: <https://download.sysinternals.com/files/ClockRes.zip> (494 KB)

Notes

* The original page includes additional learning resources about dates, times, and time zones for developers.
* Last updated: 03/23/2021.