Warzone asks a lot of a PC at once. It streams a huge map from your drive, compiles shaders, renders long sight lines and runs a busy network game, all while you try to win a gunfight on a rooftop. When it stutters, the cause is rarely one setting. It is usually two or three layers fighting each other.

This guide goes through those layers for Call of Duty: Warzone on PC: shader preloading and texture streaming, the graphics settings that move frame time, the VRAM target, what Ricochet anti-cheat and Secure Boot mean for you, Windows, the GPU driver and the network. The 60-second fix comes first.

The 60-second fix before you drop

• Let shaders finish preloading. After an update, wait in the menu until shader preloading completes before you queue. Dropping in early is the classic first-match stutter.
• Turn on NVIDIA Reflex (On + Boost) in the graphics settings.
• Set Display Mode to Fullscreen Exclusive. It usually gives the lowest latency and the most consistent frame pacing.
• Close the browser and recording tools you are not using. Warzone is heavy on CPU and memory, and both are shared.

Why Warzone stutters

Shaders and the first match

Call of Duty compiles shaders for your exact GPU and driver. After a game or driver update that work has to be redone. If it is not finished, it happens during the match, and you see it as hitches on new effects and areas. The Restart Shaders Pre-Loading option in the graphics menu rebuilds them if something went wrong.

Streaming a huge map

Warzone loads the world around you as you move. A slow or nearly full drive, or a busy CPU, shows up as hitches when you drop, redeploy or drive fast. Installing the game on an SSD with free space is one of the biggest fixes available.

Graphics memory

When the game wants more VRAM than your card has, it swaps data in and out and frame times jump. The VRAM Scale Target setting controls how much memory the game aims to use; keeping it from reaching the limit removes a whole class of stutter.

In-game settings that actually matter

Setting	Recommended	Why
NVIDIA Reflex Low Latency	On + Boost	Shortens the render queue, lowers latency.
Display Mode	Fullscreen Exclusive	Most consistent frame pacing and latency.
On-Demand Texture Streaming	Off on slow connections or small drives	Downloads higher resolution textures while you play, which costs bandwidth and disk work.
VRAM Scale Target	Around 80 to 90	Leaves headroom so the game does not hit your card's limit.
Upscaling (DLSS, FSR, XeSS)	Quality mode if the GPU is the limit	Better image at the same cost than lowering resolution yourself.
Shadow, Particle and Volumetric quality	Low	Large frame time cost in busy moments, little gameplay value.
Motion blur and depth of field	Off	They hide detail you need to see.

Ricochet, Secure Boot and what is safe to change

Call of Duty uses Ricochet anti-cheat, which includes a kernel level driver. Recent Call of Duty releases on PC also require TPM 2.0 and Secure Boot to be enabled in the BIOS. If the game refuses to start after a BIOS change or a BIOS reset, check those two first; it is a setting, not a broken install. Our BIOS settings guide covers what else lives there.

Ricochet looks for software that reads or alters the game's memory or interferes with its driver. Power plans, driver settings, network adapter options and background services are ordinary configuration. We do not claim any tool is invisible to an anti-cheat, because that cannot be promised honestly. RIP Tweaks changes Windows and driver settings and does not touch the game's memory or files. More in is RIP Tweaks safe.

Where Warzone is installed matters

Warzone is large and keeps growing with updates. An SSD with at least a fifth of its space free keeps loading and streaming fast; a hard drive, or an SSD filled to the brim, turns every redeploy into a stutter. If you play on Battle.net, RIP Tweaks will not list it automatically, so add it with Add Game; the Steam version is found on its own.

Windows is the real bottleneck

Warzone streams a huge map from disk while it renders, so a busy drive or a CPU stuck on background work shows up as a hitch every time you drop or redeploy.

• Power plan and core parking. On a balanced plan the CPU drops its clocks and parks cores whenever it thinks it is idle, and waking them costs time at exactly the wrong moment.
• Background apps. Launchers, overlays, RGB tools and updaters each wake up on their own schedule. One is nothing. Twenty of them are a stutter every few seconds.
• Timer and scheduling. A coarse system timer makes the game wait longer for its turn, which shows up as uneven frame pacing rather than lower average FPS.
• Storage. A nearly full drive slows every asset load, and that is felt as a hitch the first time something new appears.

All of it can be done by hand if you know which services are safe to touch and how to undo them. We wrote that route up in the full input delay guide.

What RIP Tweaks does for Call of Duty: Warzone

RIP Tweaks finds Call of Duty: Warzone on its own when it is installed through Steam. If it is missing from the Games page, use Add Game and point it at the game's program file. Clicking the game opens a launch panel with two modes.

• Balanced (free) quiets background apps and applies GPU Priority, I/O Priority and Purge RAM Cache before the game starts. It touches nothing risky.
• Performance (Premium) adds Disable Segment Heap and Unbind CPU 0, which keeps the game off the processor core Windows uses most, and can close Explorer for the session. Your taskbar comes back when you stop.

Those settings are tied to the game's program file only, not to your whole PC, and you can untick any of them before you launch. With an NVIDIA card you can also apply the general high performance driver profile to Call of Duty: Warzone from the same panel. There is no Call of Duty: Warzone specific profile, and we would rather say so than pretend. The system wide tweaks for power, timers, network and input apply to every game, with a restore point created first.

What it does not do: it does not change Call of Duty: Warzone's own settings, read the game's memory or touch its files. The in-game section above is still yours to set, and the Games page guide explains the rest.

GPU control panel

NVIDIA: set Power Management Mode to Prefer Maximum Performance for Call of Duty: Warzone and leave Vertical Sync off. Low Latency Mode does not matter while Reflex is on in game, because Reflex takes over the render queue.

AMD: turn on Anti-Lag in the Adrenalin profile for the game, and leave Radeon Chill and Wait for Vertical Refresh off.

Then update the driver, and do it cleanly. A driver installed on top of years of older ones carries their leftovers with it, and a fresh driver also means Call of Duty: Warzone rebuilds its shader cache, so expect the first match after an update to stutter once.

Ping, packet loss and the network

Warzone matchmaking weighs ping, but a high average ping is rarely what loses fights. Jitter and packet loss do, because they make players appear to teleport and shots arrive late.

• Use a cable instead of Wi-Fi whenever you can.
• Turn on the packet loss and latency graphs in the telemetry settings so you can see problems rather than guess.
• Pause downloads, game updates and cloud sync on the whole network while you play.
• If on-demand textures are on, they share your bandwidth with the match. Turn them off on a slow connection.

The rest of the network side is in how to lower ping in games.

Seeing whether any of it worked

Call of Duty has its own telemetry overlay (Settings, Interface, Telemetry) that can show FPS, GPU and CPU temperature and latency during a match. Watch your 1% lows across a few matches before and after a change, not your average, and change one thing at a time.

For a proper recording, free tools such as PresentMon or CapFrameX log every frame and calculate the 1% and 0.1% lows for you. If a change did not move the lows, it did not help, however much the average went up.

The checklist

• Shader preloading finished before the first match
• Reflex On + Boost, Fullscreen Exclusive, motion blur off
• VRAM Scale Target below the limit, on-demand textures off if bandwidth is tight
• Game on an SSD with free space
• TPM 2.0 and Secure Boot enabled if the game will not start
• Driver clean installed, Prefer Maximum Performance for Warzone
• Cable, telemetry showing loss, nothing downloading
• 1% lows measured in real matches, one change at a time

Frequently asked questions

Why does Warzone stutter in the first match after an update?

Shaders are being rebuilt for the new version. Wait for shader preloading to finish in the menu, and if stutter persists, use Restart Shaders Pre-Loading once.

Why will Warzone not start after I changed my BIOS?

Recent Call of Duty games require TPM 2.0 and Secure Boot. A BIOS reset or change often turns one of them off. Turn them back on and the game starts again.

Does tweaking Windows risk a Ricochet ban?

Windows and driver settings are normal system configuration, not what Ricochet looks for. It looks for software touching the game's memory or driver, which RIP Tweaks does not do.

Should I turn off On-Demand Texture Streaming?

If your connection is slow or your drive is nearly full, yes. On a fast connection with plenty of space it improves texture quality, so it is a trade-off rather than a rule.