Counter-Strike 2Input lag and mouse delay

Fix CS2 Input Lag and Mouse Delay on Windows 11

CS2 runs on Source 2, which can queue frames between your mouse input and the monitor, and when the CPU cannot feed the render thread on time those queued frames are felt as mouse delay even while the FPS counter looks healthy. Input latency is a chain of mouse polling, CPU frame pacing, GPU render queue and display scanout, so the fix is to shorten the queue instead of chasing a higher average FPS.

15 min

first check

blind tweaks

100%

reversible focus

Common symptoms

The crosshair keeps drifting for a moment after you stop moving the mouse.
Counter-strafing feels late even though FPS stays above your refresh rate.
Delay gets noticeably worse when the GPU sits at 99 percent usage on high settings.
The game felt sharp yesterday and heavy today with no setting changed.

Likely causes

The GPU is fully saturated, so finished frames wait in the render queue before they reach the display.
NVIDIA Reflex or AMD Anti-Lag is off, letting the driver buffer extra frames ahead of the CPU.
A balanced power plan lets CPU clocks fall between rounds, stretching frame times on the Source 2 main thread.
Overlays such as Discord, Steam, capture tools and browser hardware acceleration hook the swap chain and add presentation latency.

Safe fix order

1.Cap FPS a few frames below what your PC holds consistently and judge 1% lows instead of the average, so the GPU never sits pinned at 100 percent.
2.Turn on NVIDIA Reflex or AMD Anti-Lag in the CS2 video settings and keep the in-game FPS cap active.
3.Close overlays you do not need during a match, disable browser and Discord hardware acceleration, and switch Game Bar and background recording off.
4.Set a high-performance power plan, turn Windows Game Mode on, and confirm XMP or EXPO is enabled so RAM runs at its rated speed.
5.If the delay survives all of that, do a clean GPU driver install with DDU and then test HAGS on and off for a few sessions each before deciding.

Where DRX fits

DRX Optimizer applies the Windows-side part in a reversible way: power plan, Game Bar, background services, safe cleanup and per-game Game Mode, with a real status recheck after reboot. It does not touch CS2 video settings, so Reflex and your FPS cap stay your call.

Download DRX Optimizer

Before installing: what DRX changes on Windows · is DRX safe?

FAQ

Can a Windows optimizer get me banned by VAC or FACEIT?

DRX does not inject into the game or read game memory; it only changes Windows-level settings and can revert them. Leave Core Isolation and VBS as they are, because FACEIT and other anti-cheats expect the default security configuration.

Why does CS2 feel delayed when my FPS is over 400?

A high average hides frame time spikes and render queue depth. A stable frame time with Reflex enabled usually feels faster than a higher but jittery average.

Does an 8000 Hz mouse polling rate fix input lag?

It can shave a fraction of a millisecond, but on weaker CPUs a very high polling rate adds interrupt load and can worsen frame pacing. Test 1000 Hz against a higher rate and keep whichever is more consistent.