Official specs from Steam

Resident Evil 4 system requirements

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

Minimum

OSWindows® 10
ProcessorIntel® Core™ 2 Duo 2.4 Ghz or better, AMD Athlon™ X2 2.8 Ghz or better
Memory2 GB RAM
GraphicsNVIDIA® GeForce® 8800GTS or better, ATI Radeon™ HD 4850 or better
DirectXVersion 9.0c
Storage15 GB available space
Sound CardStandard audio device

Recommended

OSWindows® 10
ProcessorIntel® Core™ 2 Quad 2.7 Ghz or better, AMD Phenom™ II X4 3 Ghz or better
Memory4 GB RAM
GraphicsNVIDIA® GeForce® GTX 560 or better
DirectXVersion 9.0c
Storage15 GB available space

FAQ

What graphics card do I need for Resident Evil 4?

Minimum: NVIDIA® GeForce® 8800GTS or better, ATI Radeon™ HD 4850 or better. Recommended: NVIDIA® GeForce® GTX 560 or better.

How much RAM does Resident Evil 4 need?

Resident Evil 4 needs 2 GB RAM at minimum, 4 GB RAM recommended.

How big is Resident Evil 4?

Resident Evil 4 requires 15 GB available space.

Does Resident Evil 4 run on Mac or Steam Deck/Linux?

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