Leto

Leto

Part Number	X817092
Introduced	Early 2008
Designed By	Microsoft
Type	GPU
Clock Speed	500MHz
Memory	10MB eDRAM
Process	65nm (GPU die) 90nm (eDRAM die)
Package	Flip-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 (Gunga)

• 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

Leto uses the Gunga GPU and Styx-90 eDRAM. Little is known about Leto.

• Part Number: X817092