Elpis (GPU)

Elpis (GPU)

Part Number	X819195
Introduced	Mid 2009
Designed By	ATi Microsoft NEC (eDRAM)
Codename	B14L
Type	GPU
Used In	Elpis (Motherboard)
Clock Speed	500MHz
Memory	10MB eDRAM
Process	80nm (Both dies)
Package	Flip-chip BGA1017
Predecessor	Y1

For the motherboard, see Elpis (Motherboard).

See also: Rhea (GPU)

Elpis is an 80nm GPU specifically made for retrofitting faulty Xenon motherboard Xbox 360 consoles. Once retrofitted, the motherboard is referred to as Elpis (Motherboard). The Elpis GPU was created by slightly modifying the fixed version of the Rhea GPU and has the B14L design.

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
• 80nm process

eDRAM

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

Details

The only known change to Rhea to create Elpis was swizzling (flipping) the PCIe balls on the chip in order to match the ballout of the original 90nm Y1 chip it replaces. These chips are known to be reliable.

• Part Number: X819195
• Foundries:
  • Korea Foundry
  • Taiwan Foundry