Zeus
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 Original Zeus (X817793) | |
 Revised Zeus (X810478) | |
| Part Number | X817793 X810478 |
|---|---|
| Introduced | Late 2008 |
| Designed By | ATi Microsoft NEC (eDRAM) |
| Codename | C22 (X817793) C23 (X810478) |
| Type | GPU |
| Used In | Jasper |
| Clock Speed | 500MHz |
| Memory | 10MB eDRAM |
| Process | 65nm (GPU die) 80nm (eDRAM die) |
| Package | Flip-chip BGA1017 |
| Predecessor | Rhea |
| Successor | Kronos |
Zeus, also known as Y3 or Gunga, is a 65nm GPU used in the Xbox 360. It is the successor to Rhea. Initial variants used the C22 design, later variants used the C23 design. The 65nm process shrink required a partial redesign of the chip. The eDRAM was not shrunk and remains on a 80nm process. Zeus was the first version of Xenos where all variants are known to be reliable.
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
- 65nm process
eDRAM
- 10MB 256GB/s eDRAM
- Contains logic for:
- 4-sample anti-aliasing
- Alpha compositing
- Color
- Z/stencil buffering
- 80nm process
Details
X817793
The initial version of GPU Zeus using the C22 design. The ballout is compatible with the previous 80nm GPUs, however minor changes to the motherboard must be made.
- Part Number: X817793
- Foundry: Taiwan Foundry
X810478
A revised version of GPU Zeus using the C23 design. The specifics of what changed between the two designs is not known. This chip is a drop-in replacement for the earlier X817793 version of Zeus.
- Part Number: X810478
- Foundry: Taiwan Foundry