Using Wikipedia we found the following technical specifications.
Xbox One
CPU
- Custom 1.75 GHz AMD 8-core APU (2 quad-core Jaguar modules)
Memory
- 8 GB DDR3 (5 GB available to games)
Storage
- Internal hard drive 500 GB, 1 TB or 2 TB
- USB 3.0 storage device 256 GB or greater
Graphics
- 853 MHz (Xbox One), 914 MHz (Xbox One S) AMD Radeon GCN architecture (inside of APU)
- 4K (S Model), 1080p and 720p
