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Optimize Input Latency: Quick Guide for Intel-based Systems

Updated on Jun 21,2024

Optimize Input Latency: Quick Guide for Intel-based Systems

Table of Contents

  1. Introduction
  2. How to Lower Input Latency on Intel-based Platforms
    • 2.1. Download and Install RWEverything
    • 2.2. Accessing the XHCI USB Controller
      • 2.2.1. Locating the Base Address Registers
      • 2.2.2. Adding and Editing the Base Address Registers
    • 2.3. Disabling Interrupt Coalescing
  3. Conclusion

How to Lower Input Latency on Intel-based Platforms

In today's fast-paced world, reducing input latency has become crucial, especially for gamers and professionals who rely on rapid response times. If you're using an Intel-based platform and want to optimize your system for lower input latency, this guide will walk you through the necessary steps.

1. Download and Install RWEverything

To begin, you'll need to download and install RWEverything, a powerful utility that allows you to access and modify low-level hardware settings. Visit the official website, rw-everything.com, and download the 64-bit version of the software. Once downloaded, extract the files and run the setup to install RWEverything on your system.

2. Accessing the XHCI USB Controller

The XHCI (eXtensible Host Controller Interface) is responsible for handling USB communication on your Intel-based platform. By making adjustments to the XHCI USB controller settings, you can effectively reduce input latency. Here's how:

2.1. Locating the Base Address Registers

Open RWEverything and navigate to the top left corner of the interface. Click on the first option in the shutdown menu. From there, look for the XHCI USB controller, specifically the Base Address Registers. Depending on your system, you may have one or multiple Base Address Registers.

2.2. Adding and Editing the Base Address Registers

If you have multiple Base Address Registers, start by double-clicking on the first one to ensure the numbers match up on the left side. In case you have more than two Base Address Registers, repeat the same process for each one. Once you've identified the Base Address Registers, proceed with the following steps:

  1. Double-click on the address field.
  2. If you have two Base Address Registers, add the Second one before the first one.
  3. For instance, if the first Base Address Register is "XXXX" and the second one is "YYYY," the final entry should be "YYYYXXXX."
  4. Configure the entry to 16-bit.

Now, click on the "Address" field. If you have two Base Address Registers, you'll need to add four spaces and "2024" at the end. Press Enter to save the changes.

2.3. Disabling Interrupt Coalescing

This step involves disabling interrupt coalescing, which allows packets of data to be combined and sent as a single unit. While this feature can save CPU resources, it can also introduce higher latency. Here's how to disable interrupt coalescing:

  1. Locate the "0x00C8" entry in the top left corner of the window.
  2. Double click on it.
  3. Look for three instances of "1" and set them to "0" by simply clicking on them or pressing the "0" key on your keyboard.
  4. Once done, click "Done" to save the changes.

Remember, it's essential not to close the additional windows while making these edits. Doing so may require you to repeat the entire process.

3. Conclusion

By following the steps outlined in this guide, you can effectively lower input latency on Intel-based platforms. Disabling interrupt coalescing and fine-tuning the XHCI USB controller settings can lead to improved response times and a smoother user experience. While there may be some performance trade-offs, it's a worthwhile trade-off for those seeking optimal input latency.

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