Zeus

Zeus

File:X.jpg
Part Number	X810478 X817793
Introduced	Late 2008
Designed By	ATi Microsoft NEC (eDRAM)
Codename	C22
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 and has the C22 design. The chip was redesigned for the 65nm process. The eDRAM was not shrunk and remains on a 80nm process.

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

Ballout is compatible with the previous 80nm GPUs, however minor changes to the motherboard must be made. There are two part numbers for this chip. It is not known what the difference between them are. These chips are known to be reliable.

• Part Numbers:
  • X810478
  • X817793
• Foundry: Taiwan Foundry