Phantom Blade Zero’s approximately 5 GB day-one update is designed to improve ray-tracing and path-tracing performance and fix bugs. However, S-Game director and producer Soulframe Liang says NVIDIA driver 621.01 can be unstable in some situations and currently recommends 617.42 for compatibility. That contradicts NVIDIA’s October 20 launch guidance, which promotes 621.01 for the game’s October 28 release. Install the game update before judging performance, keep a rollback option available, and check for a newer driver once NVIDIA responds.
What does the Phantom Blade Zero 5 GB day-one patch fix?
Wccftech reported on October 28 that S-Game prepared an approximately 5 GB launch patch to improve ray-tracing and path-tracing performance and fix bugs. Liang said players who preloaded the game could download the additional update before launching; players downloading the game after release receive the latest version directly.
The patch is an optimization and stability update, not a change to the game’s basic rendering features. Phantom Blade Zero supports conventional rasterized rendering, ray-traced lighting and effects, and the considerably heavier path-tracing mode. The update specifically targets the two ray-based modes, so results may vary according to resolution, upscaling, frame generation and other settings.
Should you install NVIDIA driver 621.01?
Not automatically. NVIDIA’s official October 20 launch article lists 621.01 as the Game Ready driver for the October 28 release, highlighting DLSS 4.5, Dynamic Multi Frame Generation on RTX Spark devices, ray-traced effects and DLSS Ray Reconstruction. S-Game’s launch-day message says its testing found unstable performance with 621.01 in certain situations and identifies 617.42 as the best compatibility version at that time.
| Driver | Position | What it means for players |
|---|---|---|
| NVIDIA 621.01 | NVIDIA’s official launch recommendation, October 20, 2026 | Includes the vendor’s launch support and current DLSS features, but S-Game reports instability in some situations |
| NVIDIA 617.42 | S-Game’s tested compatibility choice, October 28, 2026 | The developer’s practical fallback while the 621.01 issue is unresolved |
The two statements are not equivalent endorsements. NVIDIA’s page describes its general Game Ready launch driver, while S-Game’s warning reflects game-specific compatibility testing. No independent report establishes that a later driver has already fixed the problem.
When is a rollback sensible?
Consider returning to 617.42 if 621.01 causes crashes, severe hitching, unusual frame-time spikes or markedly worse ray-tracing performance in Phantom Blade Zero. If the game is stable, there is no requirement to roll back solely because the warning exists. Keep the current installer or restore point available before changing drivers, and re-check NVIDIA’s release notes after launch.
How to perform a clean rollback
- Download the 617.42 package from NVIDIA’s recent driver releases before removing the current driver.
- Run the installer and choose the custom installation path, then select the option for a clean installation when it is offered.
- Restart Windows, confirm that the installed driver reports version 617.42, and launch Phantom Blade Zero again.
- Compare stability in the same graphics settings. If problems continue, return to the newer driver or wait for a subsequent release rather than repeatedly changing versions.
A rollback is troubleshooting, not a universal fix. Other causes—including shader compilation, overlays, over-aggressive settings or unrelated Windows issues—can produce similar symptoms.
How demanding are ray tracing and path tracing?
Ray tracing adds physically modeled lighting and reflections at a substantial GPU cost. Path tracing traces a much larger portion of the scene’s light transport and is substantially more demanding again. Upscaling and, where supported, frame generation are therefore central to the performance strategy on faster hardware.
DSOGaming’s published tests illustrate the ceiling rather than a guarantee. In its configuration, an RTX 5090 produced about 25–27 frames per second at native 4K with path tracing and 46–47 FPS at native 1440p. At 4K, DLSS Quality with frame generation raised the reported result to roughly 54–60 FPS before frame generation was counted. Without ray tracing or path tracing, the fastest tested GPUs exceeded 60 FPS at native 1080p Ultra. Those are one outlet’s measurements under its own test conditions, not a promise for every system.
Can an RTX 3060 Ti run Phantom Blade Zero at 1440p 60 FPS?
The official recommended target is 1440p at 60 FPS with upscaling on an RTX 3060 Ti or RX 6700 XT-class GPU. That is a target for the recommended settings profile, not a guarantee at native resolution or with path tracing enabled. Expect to use the game’s upscaler and adjust ray-based effects if frame rate is below target.
The minimum target is 1080p at 30 FPS with upscaling on a GTX 1660 or RX 5500 XT-class card. Both targets assume a capable rest of system and should be treated as configuration guidance rather than fixed performance commitments.
How much storage does Phantom Blade Zero need?
Plan for at least 300 GB of free space for the preload, even though the installed game is approximately 145 GB. The larger figure covers temporary download and installation files that are removed or consolidated after setup. The PC version requires an SSD, Windows 10 or 11 64-bit, DirectX 12 and 16 GB of RAM, according to the official Steam listing and S-Game specifications reported by PC Gamer.
- Installed footprint: approximately 145 GB.
- Preload headroom: at least 300 GB free.
- Memory: 16 GB RAM.
- Storage type: SSD required.
- Minimum graphics target: GTX 1660 or RX 5500 XT class, 1080p/30 with upscaling.
- Recommended graphics target: RTX 3060 Ti or RX 6700 XT class, 1440p/60 with upscaling.
Before starting a preload, check the free space on the drive that contains the game library—not just the drive where Windows is installed. A nearly full SSD can also leave too little room for temporary patching after launch.
What should PC players do before launching?
- Free at least 300 GB on the intended SSD and confirm the drive meets the game’s requirements.
- Complete the approximately 5 GB day-one update before enabling demanding ray-tracing modes.
- Record the current NVIDIA driver version so a rollback is possible.
- Start with the recommended upscaling mode, then enable ray tracing or path tracing one step at a time.
- If 621.01 behaves poorly, test 617.42 with a clean installation and compare the same scene and settings.
Phantom Blade Zero launched for Windows on October 28, 2026, as a single-player action RPG from S-Game. NVIDIA lists Steam and Epic Games Store as preorder destinations in its launch article.
Frequently Asked Questions
Will the 5 GB patch improve performance without ray tracing?
Its stated performance work targets ray tracing and path tracing. It also fixes bugs, so rasterized play may benefit from individual fixes, but S-Game did not promise a blanket frame-rate increase for every rendering mode.
Is 300 GB the permanent disk space requirement?
No. The reported installed footprint is about 145 GB; 300 GB is the free-space requirement for the preload process, which needs temporary working room.
Does 617.42 support all of the game’s newest NVIDIA features?
S-Game recommends 617.42 for compatibility, but NVIDIA’s launch article specifically promotes 621.01 for its launch feature set. Players must balance the developer’s compatibility advice against features introduced or emphasized in newer drivers.
Should I enable path tracing on an RTX 5090?
Only if you are willing to use aggressive upscaling and possibly frame generation. DSOGaming measured 25–27 FPS at native 4K path tracing on an RTX 5090 in its test, showing how demanding the mode can be even on a top-tier card.