Last week, CD Projekt Red unveiled The Witcher 4 tech demo during the State of Unreal 2025 event, highlighting major performance improvements in Unreal Engine 5.6. The demo showcased The Witcher 4 running at “4K” 60 FPS on a base PS5, which is quite impressive, though the noticeably soft image suggests some form of upscaling is being used (possibly TSR). But the main question is, how significant are these performance gains, and what could they mean for future UE5 titles? Could this new engine finally lead to better optimized games?

In this video, I’m testing the Paris demo running on UE 5.6 to see how much better it actually performs. Although it’s not exactly a game, this comparison gives a glimpse at how big the performance improvement is in UE 5.6. I’ll be comparing it to the latest version available for this demo, UE 5.4.

🔗 The Witcher 4 Tech Demo :    • The Witcher 4 Unreal Engine 5 Tech Demo 4K...  

📝 Recorded using Nvidia Shadowplay (via the Nvidia App). Expect around 3–5 more FPS when not recording.

PC Specs:
🟢 CPU: Ryzen 7 9800X3D
🟢 GPU: Colorful iGame GeForce RTX 4090 Vulcan OC-V
🟢 Cooler: Deepcool Mystique 360
🟢 Motherboard: MSI X870 Tomahawk WIFI
🟢 PSU: Lian Li Edge 1300W
🟢 RAM: Kingston FURY Beast DDR5 64GB (2×32GB) 6000MHz CL30
🟢 SSD: Kingston KC3000 – 2×2TB + 1×1TB
🟢 Monitor: LG C4 48" OLED
🟢 System: Windows 11 Pro

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Timestamps:
00:00 – Intro and settings
00:10 – Unreal Engine 5.4 vs Unreal Engine 5.6
01:27 – Outro

#unrealengine5 #rtx4090 #thewitcher4