CS 1.6 Mouse Settings: Fix Acceleration & Raw Input

Last updated: May 3, 2026

Setting up the perfect CS 1.6 mouse config means achieving absolute 1:1 raw input. Any form of mouse acceleration, smoothing, or Windows interference will ruin your aiming consistency and muscle memory. This guide covers the exact settings required to lock your sensitivity, disable acceleration, and configure your eDPI correctly. If your current client ignores raw input commands, download a clean CS 1.6 client before proceeding.

Raw Input Config (Quick Setup)

To instantly disable all acceleration and force 1:1 raw tracking, apply these two steps.

Launch Options

Right-click CS 1.6 in Steam → Properties → Launch Options (or add to your Non-Steam shortcut Target line):

-noforcemparms -noforcemaccel -noforcemspd +m_rawinput 1

Console Commands

Open the in-game console (~) and paste:

m_rawinput 1; m_filter 0; m_customaccel 0; zoom_sensitivity_ratio 1.0

Windows Pointer Settings

Windows applies dynamic cursor speed changes by default. Disable this at the OS level before changing anything in CS 1.6 — Windows acceleration affects the game regardless of in-game settings on older builds.

1. Press the Windows Key, search for Mouse Settings, and open Additional mouse options.
2. Go to the Pointer Options tab.
3. Uncheck “Enhance pointer precision” — this disables Windows mouse acceleration.
4. Set the pointer speed slider exactly to the 6th notch (dead center). Any other position causes Windows to skip or multiply mouse pixels, adding hidden acceleration even with “Enhance pointer precision” disabled.

Non-Steam Fixes: RInput, MarkC & DirectInput

Many Non-Steam CS 1.6 builds do not have the m_rawinput command built into the engine. If you type m_rawinput 1 and get an “Unknown command” error, your game is relying on the Windows API which forces hidden acceleration curves even if you disabled “Enhance pointer precision”. Non-Steam players must use one of these three solutions.

Solution 1: RInput.exe (Raw Input Injector)

RInput is a lightweight tool that intercepts raw mouse data and injects it directly into the CS 1.6 executable, bypassing all Windows mouse processing and mimicking native raw input.

• Download RInput v1.44 — direct download, no registration required.
• Launch your Non-Steam CS 1.6 client.
• Alt-tab out, open RInput.exe as Administrator, type hl.exe into the console window, and press Enter.
• RInput immediately bypasses Windows scaling. You must do this every time you launch the game — or create a .bat file to automate it.

Automate with a .bat file: Create a new text file, paste the following, and save it as start_cs.bat in your CS 1.6 folder:

start "" "hl.exe" -game cstrike
timeout /t 3
start "" "RInput.exe"

Run start_cs.bat as Administrator instead of launching CS 1.6 directly.

Solution 2: MarkC Mouse Fix (Registry Edit)

The MarkC Mouse Fix alters the Windows registry to force a perfectly flat 1:1 mouse curve system-wide, eliminating acceleration for all legacy DirectX and OpenGL games without running any injector.

1. Download the MarkC Windows 10/11 Mouse Fix — search for “MarkC mouse fix” on any major gaming forum.
2. Check your display scaling: Settings → System → Display → Scale and layout (usually 100%).
3. Run the corresponding .reg file (e.g., Windows_10_Fix_100%.reg) and click Yes.
4. Restart your computer. The fix is permanently applied until you revert it.

Solution 3: DirectInput Launch Parameter (-dinput)

Forces the GoldSrc engine to use Microsoft’s DirectInput API instead of the standard Windows cursor API. Less accurate than RInput but requires no external tools or registry changes.

Add -dinput to your CS 1.6 shortcut Target line, combined with -useforcedmparms:

-dinput -useforcedmparms -noforcemaccel -noforcemspd

Launch Options

These parameters prevent CS 1.6 from reading Windows mouse settings at startup. Required for Non-Steam players without native raw input, and recommended for all players as an additional safeguard.

Parameter	Function
-noforcemparms	Stops the engine from loading Windows mouse button configurations at startup.
-noforcemaccel	Forces the game to ignore the Windows mouse acceleration curve entirely.
-noforcemspd	Forces the game to ignore the Windows pointer speed slider value.

Console Mouse Commands

Command	Function
m_rawinput 1 (Steam/Modern builds only)	Reads mouse data directly from hardware. Zero OS filtering, zero delay. If console returns “Unknown command” — use RInput instead.
m_filter 0	Disables mouse smoothing. Smoothing averages your last two input frames, adding artificial input lag to every movement.
m_customaccel 0	Disables CS 1.6’s internal acceleration curve. Must be 0 — even with raw input active, this adds acceleration if left at default.
m_yaw 0.022 m_pitch 0.022	Horizontal and vertical sensitivity multipliers. Do not change from 0.022 — even on stretched 4:3 resolutions.
zoom_sensitivity_ratio 1.0	1:1 sensitivity scaling for scoped weapons (AWP, Scout) relative to hip-fire sensitivity.

Finding the Best Sensitivity (eDPI)

Copying a pro player’s in-game sensitivity is meaningless without knowing their mouse DPI. Use eDPI to compare and calculate your correct sensitivity regardless of hardware.

eDPI = Mouse DPI × In-Game Sensitivity

Most professional CS 1.6 players use an eDPI between 500 and 1200 for precise micro-adjustments at long range.

Playstyle	eDPI Range	Example at 400 DPI
Low — Arm Aimers	500–800 eDPI	400 DPI @ sensitivity 1.5–2.0
Medium — Wrist Aimers	800–1200 eDPI	400 DPI @ sensitivity 2.0–3.0
High — Twitch Aimers	1200+ eDPI	400 DPI @ sensitivity 3.0+

Starting point: Set your mouse to 400 DPI or 800 DPI in your mouse software. Set in-game sensitivity to 2.0. A full arm swipe from center to edge of mousepad should complete a 180-degree turn. Adjust from there.

For a complete breakdown of professional sensitivity settings and grip types, see best CS 1.6 mouse settings for good aim.

Mouse Polling Rate & Lag Fix

Polling rate is how often your mouse reports its position to the PC. CS 1.6 runs on the GoldSrc engine which has a fixed input processing limit — too high a polling rate causes the engine to overflow and freeze.

• 500Hz (Recommended): Most stable for GoldSrc. 2ms response time with no tracking errors on any CS 1.6 build.
• 1000Hz: 1ms response time but can cause crosshair skipping or stuttering on older Non-Steam builds.
• 4000Hz / 8000Hz — do not use: Modern mice (Razer, Corsair, Logitech G series) default to 4000Hz or 8000Hz. The CS 1.6 engine cannot process this many inputs per second and overflows — causing the game to completely freeze when moving the mouse. Lower to 500Hz in your mouse software immediately.

Saving to userconfig.cfg

Public servers can execute scripts that reset your sensitivity or re-enable acceleration mid-session. Lock all mouse settings permanently in a protected config file.

1. Open your CS 1.6 installation folder and go to the cstrike directory.
2. Create a new text file named exactly userconfig.cfg.
3. Add your settings:

   sensitivity "2.0"
   m_rawinput "1"
   m_filter "0"
   m_customaccel "0"
   zoom_sensitivity_ratio "1.0"

4. Open config.cfg, scroll to the very last line, and add: exec userconfig.cfg
5. Right-click config.cfg → Properties → check Read-only. This prevents servers from overwriting it.

For full instructions on protecting all CS 1.6 settings from server overwrites, see how to save CS 1.6 settings permanently.