Official specs from Steam
Portal 2 system requirements
Minimum and recommended PC specs as listed by the developer on Steam. Native Linux build available.
Minimum
| OS * | Windows 7 / Vista / XP |
|---|---|
| Processor | 3.0 GHz P4, Dual Core 2.0 (or higher) or AMD64X2 (or higher) |
| Memory | 2 GB RAM |
| Graphics | Video card must be 128 MB or more and with support for Pixel Shader 2.0b (ATI Radeon X800 or higher / NVIDIA GeForce 7600 or higher / Intel HD Graphics 2000 or higher). |
| DirectX | Version 9.0c |
| Storage | 8 GB available space |
| Sound Card | DirectX 9.0c compatible |
FAQ
What graphics card do I need for Portal 2?
Minimum: Video card must be 128 MB or more and with support for Pixel Shader 2.0b (ATI Radeon X800 or higher / NVIDIA GeForce 7600 or higher / Intel HD Graphics 2000 or higher)..
How much RAM does Portal 2 need?
Portal 2 needs 2 GB RAM at minimum.
How big is Portal 2?
Portal 2 requires 8 GB available space.
Does Portal 2 run on Mac or Steam Deck/Linux?
There is no native macOS version. A native Linux build is available.