SCSKiller Shader Cache Size: How Much Disk Space You Need

Learn how SCSKiller's shader cache size works, how much space games need, and how to manage your GPU driver cache to eliminate stutter.

Shader compilation stutter has haunted PC gaming for years, and SCSKiller has quickly become the community's favorite weapon against it. But before you warm every game in your library, you need to understand the SCSKiller shader cache size implications — because pre-compiled pipelines aren't free. They live in your GPU driver's shader cache, and that cache can balloon to several gigabytes per game if you're not paying attention.

In this guide, we'll break down how the SCSKiller shader cache size works, what you should set your driver cache limit to, real-world cache sizes from popular games, and practical tips for keeping your storage under control.

What Is SCSKiller and Why Does Cache Size Matter?

SCSKiller — short for Shader Compilation Stutter Killer — is a free, open-source Windows utility developed by BlueHeisenberg. Instead of waiting for a game to compile shaders mid-gameplay (which causes those infuriating frame hitches), SCSKiller scans the shaders a game ships with, predicts the pipeline state objects (PSOs) it will need, and compiles them into your GPU driver's shader cache before you ever launch the game.

The catch: those compiled PSO binaries have to go somewhere. The SCSKiller shader cache size question matters for two reasons:

Disk space — large games can generate gigabytes of compiled pipelines
Driver cache limits — both NVIDIA and AMD cap the driver shader cache size, and if your compiled pipelines exceed that limit, the driver may evict entries and force recompiles in-game

In a Wccftech hands-on test, SCSKiller generated roughly 3 GB of NVIDIA PSO binaries for FINAL FANTASY VII Rebirth alone. Multiply that across a dozen stutter-prone titles and you can quickly approach a 16 GB cache limit — or exceed it.

Recommended Driver Shader Cache Settings

SCSKiller's interface actually displays your current driver shader cache usage against the limit — the developer's own screenshots show a system at "10.8 GB of 16 GB limit" with an NVIDIA GeForce GPU. Here's how the two major GPU vendors handle cache sizing:

Vendor	Default Cache Behavior	How to Adjust	Recommended Setting
NVIDIA	Managed automatically; size varies by driver	NVIDIA Control Panel → Manage 3D Settings → Shader Cache Size	10–100 GB if you have the space; "Driver default" for smaller SSDs
AMD	Managed by the driver	AMD Software → Graphics → Advanced	Leave at default; AMD handles eviction automatically

Tips for setting your cache limit

Set NVIDIA's shader cache to at least 30–50 GB if you plan to warm multiple large games. A cache that's too small forces the driver to evict compiled PSOs, undoing SCSKiller's work.
Don't set it to unlimited on a small SSD. The cache lives on your system drive by default.
Remember that driver updates wipe the cache. Every driver update clears your shader cache — which is exactly why SCSKiller detects the wipe and offers to recompile automatically.

Real-World SCSKiller Shader Cache Sizes by Game

Community reports and hands-on testing give us a picture of what to expect. Cache sizes vary by GPU vendor, driver version, and game engine, but these figures are useful ballparks:

Game	Approx. PSO Cache Size	Cold Cache Stutters (≥20 ms)	Stutters With SCSKiller
FINAL FANTASY VII Rebirth	~3 GB (NVIDIA)	19 (RTX 5090) / 162 (AMD)	0 on both
Hogwarts Legacy	Large (multi-GB)	1,014 (RTX 5090) / 27,743 (AMD)	87 / 206
Star Wars Jedi: Survivor	Large (multi-GB)	9,038 (RTX 5090)	11
Tiny Tina's Wonderlands	Moderate	583 (RTX 5090)	0
Silent Hill: Townfall	Moderate	24 (RTX 5090)	0

The takeaway: the worst stuttering offenders often demand the biggest caches. Star Wars Jedi: Survivor dropped from 9,038 shader stalls to just 11, but eliminating that level of just-in-time compilation means storing a serious volume of compiled pipelines.

How SCSKiller Fits Into the Storage Equation

SCSKiller itself is lightweight — the compiled pipelines go into your driver's own shader cache, not into SCSKiller's folder. According to the project's documentation, the app's settings and per-game plans live in %LOCALAPPDATA%\SCSKiller\, which stays small.

Here's where everything lives:

Data	Location	Typical Size
SCSKiller app + plans	`%LOCALAPPDATA%\SCSKiller\`	Small (MBs)
Compiled PSO binaries	GPU driver shader cache (NVIDIA/AMD managed)	1–5+ GB per warmed game
Recorder files (optional)	Individual game folders	Removed when recording is off

This design is smart: because the binaries land in the driver cache, the game reads them natively at launch — no injection, no hooks. You can even close SCSKiller after compiling and the game will still benefit.

How to Manage Your SCSKiller Shader Cache Size: Step by Step

Follow this checklist to keep storage and performance in balance:

Step	Action	Why It Matters
1	Check free space on your system drive	Warmed caches can consume 10+ GB across several games
2	Raise your driver shader cache limit	Prevents eviction and in-game recompiles
3	Warm only games you actually play	Avoids wasting GBs on titles you'll never launch
4	Let SCSKiller rebuild after driver updates	Driver updates wipe the cache; the app recompiles automatically if allowed
5	Clear the cache manually if space runs low	NVIDIA and AMD both offer cache-clear options; SCSKiller will rebuild on demand

Which games should you prioritize?

Games without proper pre-compilation screens — if a game never compiles shaders at startup, it's a prime candidate
Unreal Engine 4 titles — historically the worst offenders for traversal-time PSO stutter
Games you revisit regularly — the cache investment pays off across many sessions

What SCSKiller Can and Cannot Fix

Before you start warming your entire library, set expectations. The developer is refreshingly honest about the tool's scope:

Fixes: shader compilation stutter, the hitch you feel when a new effect forces a driver to compile a pipeline mid-frame
Cannot fix: traversal stutter, asset streaming hitches, and frame drops from other causes like CPU bottlenecks
Occasionally: a shader the tool couldn't predict or record will still compile in game

The measured results are impressive, though. Per the developer's testing with a pipeline recorder (about five minutes of play per game on a cold cache), Hogwarts Legacy on AMD's Strix Halo platform fell from 27,743 stutters to 206, and worst-case stall times dropped from multi-second freezes to around 100 ms.

Safety and Compatibility Notes

A few important points before installing:

Supported platforms: Windows 10 (version 2004) or 11, 64-bit, with NVIDIA or AMD GPUs. DirectX 12 games are supported on both; DirectX 11 is supported on NVIDIA.
Anti-cheat safety: SCSKiller never launches, injects into, or records anti-cheat-protected games — it only reads their files. The sole exception is an opt-in, offline-only recording mode for ELDEN RING and ARMORED CORE VI, confirmed before every launch and used at your own risk.
Download only from the official GitHub repository — the developer warns that unofficial downloads exist, and releases aren't code-signed yet, so SmartScreen will flag the first run. Verify the SHA-256 hash against the release notes if you're cautious.
Smart App Control users on Windows 11: unsigned apps are blocked outright, so you'll need to wait for a signed release (signing through the SignPath Foundation is in progress).

Frequently Asked Questions

How large is the SCSKiller shader cache size for a typical game?

It varies widely, but expect roughly 1–3 GB per major title. FINAL FANTASY VII Rebirth generated about 3 GB of NVIDIA PSO binaries in testing, while smaller or better-optimized games may need far less. SCSKiller's library view shows the cache size per game before you compile.

What should I set my driver shader cache limit to?

If you have SSD space to spare, set NVIDIA's Shader Cache Size to 30–100 GB via the NVIDIA Control Panel. A limit that's too small causes the driver to evict compiled pipelines, which forces recompiles and brings the stutter right back.

Does SCSKiller's shader cache size shrink if I uninstall a game's cache?

Yes. You can clear your driver's shader cache through the NVIDIA Control Panel or AMD Software at any time, and SCSKiller will simply rebuild the pipelines next time you ask it to. The compiled data is regenerable — it's never modified game files.

Is it safe to use SCSKiller with anti-cheat games?

Community-verified information from the project's documentation says yes: SCSKiller never launches, injects into, or records anti-cheat-protected games, reading their files only. The narrow exception is a per-game, opt-in offline recording mode for ELDEN RING and ARMORED CORE VI, which carries risk and should be used with care.

Final Thoughts

The SCSKiller shader cache size is the trade-off for buttery-smooth gameplay: a few gigabytes of disk per game in exchange for eliminating hundreds or even thousands of frame stalls. With results like Jedi: Survivor falling from 9,038 stutters to 11, most PC gamers will consider that storage a bargain. Just size your driver cache generously, prioritize the games that actually stutter, and let SCSKiller handle rebuilds after driver updates — your frame times will thank you.