Zeus

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Zeus
X817793-001.jpg
Original Zeus (X817793)
X810478-002.jpg
Revised Zeus (X810478)
Part NumberX817793
X810478
IntroducedLate 2008
Designed ByATi
Microsoft
NEC (eDRAM)
CodenameGunga
TypeGPU
Used InJasper
Clock Speed500MHz
Memory10MB eDRAM
Process65nm (GPU die)
80nm (eDRAM die)
PackageFlip-chip BGA1017
PredecessorRhea
Elpis
SuccessorKronos

Zeus, developed under the codenames Gunga and Y3, is a 65nm GPU and is used on the Jasper motherboard. It is the successor to Rhea. 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
  • C22 stepping (X817793)
  • C23 stepping (X810478)
  • 65nm process

eDRAM

  • 10MB 256GB/s DRAM
  • Contains logic for:
    • 4-sample anti-aliasing
    • Alpha compositing
    • Color
    • Z/stencil buffering
  • FS21 stepping
  • 80nm process

Details

All variants of Zeus use the Styx eDRAM.

X817793

The initial version of GPU Zeus with C22 stepping. The ballout is compatible with the previous 80nm GPUs, however minor changes to the motherboard must be made.

  • Part Number: X817793

X810478

A revised version of GPU Zeus with C23 stepping. The specifics of what changed between the two cores is not known. This chip is a drop-in replacement for the earlier version of Zeus.

  • Part Number: X810478