Leto

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Leto
X817092-001.jpg
Part NumberX817092
IntroducedEarly 2008
Designed ByMicrosoft
TypeGPU
Clock Speed500MHz
Memory10MB eDRAM
Process65nm (GPU die)
90nm (eDRAM die)
PackageFlip-chip BGA1017

Leto is an engineering sample GPU. It appears to be the same as Zeus, so it's purpose is not known.

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
  • 65nm process

eDRAM (Styx-90)

  • 10MB 256GB/s eDRAM
  • Contains logic for:
    • 4-sample anti-aliasing
    • Alpha compositing
    • Color
    • Z/stencil buffering
  • FS21 stepping
  • 90nm process

Details

Little is known about Leto.

  • Part Number: X817092