Official specs from Steam

Danganronpa V3: Killing Harmony system requirements

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

Minimum

NoteRequires a 64-bit processor and operating system
OS *Windows 7 64-bit
ProcessorIntel Core i3-4170 @ 3.70GHz
Memory4 GB RAM
GraphicsNVIDIA@ GeForce@ GTX 460 or better
DirectXVersion 11
Storage26 GB available space
Sound CardDirectX compatible soundcard or onboard chipset

Recommended

NoteRequires a 64-bit processor and operating system
OS *Windows 7 64-bit
ProcessorIntel Core i5-4690K @3.50GHz
Memory8 GB RAM
GraphicsNVIDIA@ GeForce@ GTX 960
DirectXVersion 11
Storage26 GB available space
Sound CardDirectX compatible soundcard or onboard chipset

FAQ

What graphics card do I need for Danganronpa V3: Killing Harmony?

Minimum: NVIDIA@ GeForce@ GTX 460 or better. Recommended: NVIDIA@ GeForce@ GTX 960.

How much RAM does Danganronpa V3: Killing Harmony need?

Danganronpa V3: Killing Harmony needs 4 GB RAM at minimum, 8 GB RAM recommended.

How big is Danganronpa V3: Killing Harmony?

Danganronpa V3: Killing Harmony requires 26 GB available space.

Does Danganronpa V3: Killing Harmony run on Mac or Steam Deck/Linux?

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