Official specs from Steam

Silent Hill 2 system requirements

Minimum and recommended PC specs as listed by the developer on Steam.

Minimum

NoteRequires a 64-bit processor and operating system
OSWindows 10 x64
ProcessorIntel Core i7-6700K | AMD Ryzen 5 3600
Memory16 GB RAM
GraphicsNVIDIA® GeForce® GTX 1070 Ti or AMD Radeon™ RX 5700 or Intel® Arc™ A750
DirectXVersion 12
Storage50 GB available space
Sound CardWindows Compatible Audio Device.
Additional NotesPlaying on minimum requirements should enable to play on Low/Medium quality settings in FullHD (1080p) in stable 30 FPS. SSD is recommended.

Recommended

NoteRequires a 64-bit processor and operating system
OSWindows 10 x64
ProcessorIntel Core i7-8700K | AMD Ryzen 5 3600X
Memory16 GB RAM
GraphicsNVIDIA® GeForce® 2080RTX or AMD Radeon™ 6800XT
DirectXVersion 12
Storage50 GB available space
Sound CardWindows Compatible Audio Device.
Additional NotesPlaying on recommended requirements should enable to play on Medium quality settings in 60 FPS or High quality settings in 30 FPS, in FullHD (or 4k using DLSS or similar technology). SSD is recommended.

FAQ

What graphics card do I need for Silent Hill 2?

Minimum: NVIDIA® GeForce® GTX 1070 Ti or AMD Radeon™ RX 5700 or Intel® Arc™ A750. Recommended: NVIDIA® GeForce® 2080RTX or AMD Radeon™ 6800XT.

How much RAM does Silent Hill 2 need?

Silent Hill 2 needs 16 GB RAM at minimum, 16 GB RAM recommended.

How big is Silent Hill 2?

Silent Hill 2 requires 50 GB available space.

Does Silent Hill 2 run on Mac or Steam Deck/Linux?

There is no native macOS version. There is no native Linux build (Proton compatibility may vary).