Slay the Spire 2 runs on a DirectX 12 and Vulkan renderer — a modern, multi-threaded pipeline that drives the game's animated card effects and dynamic combat backgrounds. On most hardware the workload is light: the turn-based structure means your GPU spends the majority of a run idle between turns. The performance exception is effect-heavy board states — Defect Orb Evoke chains, Watcher stance-switch combos, and multi-hit Silent builds where dozens of animations resolve simultaneously and create localised frame time spikes on budget hardware. This guide covers the five changes that prevent those spikes and a complete settings reference for every tier from integrated graphics to mid-range GPUs.
5 Settings to Change First
These adjustments address the most common performance issues. Make them before changing anything else:
- VSync → Off. VSync adds input latency and causes frame pacing issues when GPU output varies during heavy effect sequences. Turn it off and use the in-game Frame Rate Limit instead — you get a stable ceiling without the latency penalty.
- Frame Rate Limit → your monitor's refresh rate. A turn-based card game delivers no gameplay benefit from uncapped frames. Cap to 60, 144, or 165 Hz to match your display and eliminate unnecessary GPU and CPU load during idle menus and map screens.
- Particle Effects → Medium. The single most impactful setting on budget hardware. High particle counts during Orb Evoke chains, Watcher stance sequences, and multi-hit card strings spike GPU usage significantly. Medium preserves full card effect readability while eliminating the worst frame time spikes.
- Shadow Quality → Low or Off. Dynamic shadows in a card game's top-down combat view contribute minimally to visual quality. Dropping from High to Low recovers 15–20% frame time on GTX 1050 Ti and below with no perceptible difference during gameplay.
- Anti-Aliasing → 2x MSAA. StS2's illustrated art style benefits from light edge smoothing for card text and character outlines. 2x MSAA delivers clean edges at roughly one-third the GPU cost of 4x. Off mode introduces visible jaggies on card borders at 1080p.
Slay the Spire 2 Video Settings: Full Table
Settings are found under Options → Video. The table covers two hardware tiers: budget (integrated graphics or GTX 1050 Ti class) and mid-range (GTX 1660 / RX 580 class). For a full explanation of what these setting types do across PC games, see our Game Settings Explained guide.
| Setting | Budget / iGPU | Mid-Range GPU | Notes |
|---|---|---|---|
| Display Mode | Borderless | Borderless | Allows fast alt-tab without a black screen. Exclusive Fullscreen adds no FPS benefit in a turn-based game |
| Resolution | 1920×1080 | Native | Card text and UI render at fixed DPI — dropping below 1080p makes text harder to read with minimal FPS gain on iGPU |
| Frame Rate Limit | 60 | Monitor refresh | Set to your display's refresh rate. No gameplay benefit to uncapped frames in a turn-based game |
| VSync | Off | Off | Causes frame pacing issues and adds latency. Use Frame Rate Limit instead |
| Particle Effects | Low | Medium–High | The primary GPU lever on budget hardware. Defect Orb chains and Watcher stance sequences spike particle counts significantly |
| Shadow Quality | Off | Low–Medium | Minimal visual impact at card-play camera angles. Off saves meaningful frame time on integrated GPUs |
| Anti-Aliasing | Off or FXAA | 2x MSAA | 2x MSAA is the sweet spot for card text clarity; 4x adds cost with diminishing returns on the illustrated art style |
| Ambient Occlusion | Off | Low | Minimal visual contribution in a card game environment; Off recovers consistent headroom on budget hardware |
| Background Quality | Low | High | Controls background art detail in combat and map screens. Low is barely noticeable; High is free on mid-range GPUs |
| Render Scale | 75% | 100% | If available: renders at a lower internal resolution before upscaling. 75% cuts render work ~25% with minimal visual change at 1080p |
Why Slay the Spire 2 Stutters During Complex Turns
StS2's engine processes each card effect's logic, triggers passive effects in sequence, and queues animation events for every entity on screen — all on the main thread during turn resolution. On older quad-core systems (Core i5-6600 or similar), you will often see the GPU sitting below 60% utilisation while frame times spike. The cause is the CPU main thread queueing particle animation events faster than they drain, not the GPU struggling to render them. Setting Particle Effects to Medium or Low is the correct fix.
To confirm which component is your limit: open Task Manager (Ctrl+Shift+Esc) → Performance while running a Defect Orb build or a multi-hit Silent deck. CPU above 80% during complex turns with GPU below 70%? Lower Particle Effects. GPU consistently at 90%+ with CPU comfortable? Reduce Anti-Aliasing and Shadow Quality first.
System Requirements
| Component | Minimum | Recommended |
|---|---|---|
| OS | Windows 10 (64-bit) | Windows 10 (64-bit) |
| CPU | Dual-core 2.0 GHz | Quad-core 3.0 GHz |
| RAM | 4 GB | 8 GB |
| GPU | DirectX 12 / Vulkan, 1 GB VRAM | DirectX 12 / Vulkan, 2 GB VRAM |
| Storage | 4 GB | 4 GB |
Windows Settings That Help
Power Plan → High Performance. Windows' Balanced power plan throttles CPU clock speed between tasks. StS2's variable CPU load bursts during turn resolution are exactly the scenario where Balanced causes avoidable frame time spikes. Set it via Control Panel → Hardware and Sound → Power Options. On laptops, plug in and enable the maximum performance profile before long runs.
Close background CPU loads before sessions. Browser tabs with video playback, Discord video calls, and active cloud sync all compete with StS2's main thread during heavy board states. On systems near the minimum spec, clearing these before a run eliminates the most common source of mid-run stutter. For GPU driver settings, process optimisation, and system tweaks that apply across all PC games, see our PC performance and FPS optimisation guide.
Frequently Asked Questions
Does Slay the Spire 2 support DLSS or FSR?
StS2 does not currently include DLSS or FSR upscaling. The game's minimum VRAM requirement is just 1 GB, and its GPU load is low enough that upscaling provides little benefit for most hardware. If a Render Scale slider is available in Options → Video, setting it to 75–80% provides a comparable FPS gain on integrated graphics with minimal visual change at 1080p [1].
Why does StS2 perform worse than the original Slay the Spire on older PCs?
Slay the Spire 2 requires DirectX 12 or Vulkan, compared to the original's OpenGL pipeline. DX12 and Vulkan need fully up-to-date drivers and GPU firmware support. If you have a GPU released before 2016, check that your drivers are current and verify that DX12 or Vulkan is available via the DirectX Diagnostic Tool (run dxdiag in Windows search). Switching the API via Steam Launch Options (-vulkan or -dx12) can also resolve compatibility differences between hardware generations [2].
What is the best single setting to improve FPS on integrated graphics?
Particle Effects. Dropping from High to Low on Intel UHD, AMD Radeon Vega, and similar integrated GPUs resolves the most common frame time spikes during complex board states. Pair it with Shadow Quality Off, a 60 FPS Frame Rate Limit, and VSync Off. Most modern iGPUs including Intel UHD 630 and AMD Radeon Vega 8 maintain stable 60 FPS across standard combat at these settings. Complex Orb builds and multi-hit Silent combos may cause brief dips to 45–50 FPS even at Low on older integrated hardware.
Sources
- Mega Crit. Slay the Spire 2 — System Requirements. Steam Store
- Slay the Spire Wiki contributors. Slay the Spire 2 — Game Reference. Fandom Wiki
I've been playing video games for over 20 years, spanning everything from early PC titles to modern open-world games. I started Switchblade Gaming to publish the kind of accurate, well-researched guides I always wanted to find — built on primary sources, tested in-game, and kept up to date after patches. I currently focus on Minecraft and Pokémon GO.