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| File:X02056.jpg The original Xenos, Y1 | |
| Introduced | 2005 |
|---|---|
| Designed By | ATi Microsoft NEC (eDRAM) |
| Codename | ATi C1 |
| Type | GPU |
| Used In | Original Xbox 360 |
| Clock Speed | 500MHz |
| Memory | 10MB eDRAM (GPU) |
| Successor | XCGPU |
Xenos, codenamed C1, is the graphics processor, northbridge, and memory controller used in the Xbox 360 game console. It also features an NEC designed 10MB eDRAM which also contains additional logic (such as anti-aliasing).
The processor was developed by Microsoft and ATi, and the first version was codenamed Y1, which stands for Year 1.
Specifications
GPU
- 500Mhz clock speed
- 48 floating-point vector processors divided into 3 dynamically scheduled SIMD groups (16 each)
- Unified shader architecture
- 16 texture addressing units
- 16 texture filtering units
- 8 pixel rendering pipelines
- Direct access to CPU L2 cache
eDRAM
- 10MB 256GB/s eDRAM
- Contains logic for:
- 4-sample anti-aliasing
- Alpha compositing
- Color
- Z/stencil buffering
Versions
There are multiple versions of the Xenos, used on different motherboard types