Elpis (GPU)

Elpis (GPU)

Part Number	X819195
Introduced	Mid 2009
Designed By	ATi Microsoft
Type	GPU
Used In	Elpis (Motherboard)
Clock Speed	500MHz
Memory	10MB eDRAM
Process	90nm (Both dies)
Package	Flip-chip BGA1017
Predecessor	Y1
Successor	Zeus

For the motherboard, see Elpis (Motherboard).

See also: Rhea

Elpis is a 90nm GPU specifically made for retrofitting faulty Xenon motherboards. Once retrofitted, the motherboard is also referred to as Elpis. The Elpis GPU was created by slightly modifying the fixed (higher Tg) version of the Rhea GPU.

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
• B14L stepping
• 90nm 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

A Korean Elpis

The only known change from 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. Like Rhea, it uses the Styx-90 eDRAM. These chips are known to be reliable.

• Part Number: X819195

Prototypes

Engineering Samples by stepping.

B14L

Engineering sample for the final production chip, based off Rhea.

• Part Number: X819715-002