Venus

Venus

Part Number	X809141
Introduced	Early 2006
Designed By	ATi Microsoft NEC (eDRAM)
Type	GPU
Clock Speed	500MHz
Memory	10MB eDRAM
Process	90nm (Both dies)
Package	Flip-chip BGA1017
Successor	Rhea

Venus is an engineering sample GPU used to checkout the first version of the Styx-90 eDRAM. The GPU die is the same 90nm die as Y1.

Specifications

GPU (Xenos C1)

• 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
• A32 stepping
• 90nm process

eDRAM (Styx-90)

• 10MB 256GB/s eDRAM
• Contains logic for:
  • 4-sample anti-aliasing
  • Alpha compositing
  • Color
  • Z/stencil buffering
• FS11 stepping
• 90nm process

Details

Venus from another angle

Based on the manufacturing date, it is speculated that this chip was designed in order to test Styx-90 before the Xenos C2 or Gunga were available. The GPU die is marked with "GPU Y3/Venus ES", indicating that it is part of the Y3 program. Little else is known about Venus.

• Part Number: X809141