Hardware requirements for Windows 7
Microsoft has published minimum hardware requirements for the retail editions of Windows 7 (Home Premium, Professional, and Ultimate). The specifics are listed in Table below. Note that RAM and disk space requirements are slightly higher for 64-bit versions of Windows 7.
Windows 7 Hardware Requirements| Component | Minimum System Requirement |
| Processor (CPU) | 1-GHz or faster, 32-bit (x86) or 64-bit (x64) processor |
| Memory | 1 GB RAM (32-bit) 2 GB RAM (64-bit) |
| Graphics processor | Support for DirectX 9 graphics with WDDM 1.0 or higher driver |
| Hard disk | 16 GB available disk space (32-bit) 20 GB available disk space (64-bit) |
A DVD or other optical storage device is optional but useful for many tasks. For most everyday tasks, you'll also need a mouse or other pointing device, a keyboard, audio playback capabilities, and internet access. In addition, certain Windows 7 features require additional hardware, such as a television tuner card (for viewing and recording television in Media Center).