Y1 (GPU)

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Y1
X02056-010.jpg
Original Y1 (X02056)
X817791-003.jpg
Revised Y1 (X817791)
Part NumberX02056
X817791
IntroducedLate 2005
Designed ByATi
Microsoft
NEC (eDRAM)
CodenameC1
TypeGPU
Used InXenon
Zephyr_A
Clock Speed500MHz
Memory10MB eDRAM
Process90nm (Both dies)
PackageFlip-chip BGA1017
SuccessorY2
Elpis

Y1 is the launch model GPU and is used on the Xenon and Zephyr_A motherboards. Both dies are manufactured on a 90nm process.

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
  • A32 stepping
  • 90nm process

eDRAM

  • 10MB 256GB/s DRAM
  • Contains logic for:
    • 4-sample anti-aliasing
    • Alpha compositing
    • Color
    • Z/stencil buffering
  • ES3 (C00) stepping
  • 90nm process

Details

X02056

Korean X02056 from 2008
Uncommon -012 model X02056 from 2005

The initial version of the GPU Y1, used in the launch model consoles. It uses the Edifis eDRAM. This chip contains a design defect in which low Tg underfill is used to support the bumps. This causes reliability issues and premature failure of the chip.

  • Part Number: X02056 (-010, -011, -012)

X817791

In Mid 2008, GPU Y1 received a revision and part number change. "GPU - Y1" markings were added to differentiate from other in-production chips. It uses the Edifis eDRAM. In addition, it uses a higher Tg underfill material and as a result, is known to be reliable. It is not known if there are any other differences.

  • Part Number: X817791

Prototypes

Engineering Samples by stepping. Text on many of these chips is very faint and hard to capture. Most use the older Xbox logo.

A11N1

The first version of the Y1 GPU. Supposedly, the ES1 (A00) eDRAM is broken and does not work.

  • Part Number: X02056-002

X02056-002.jpg

A11N2

Fixes the eDRAM issue with ES2 (B00). Two substrate colors have been seen.

  • Part Number: X02056-004

X02056-004.jpg X02056-004-2.jpg

A debug substrate version also exists, marked as "GPU DBG". It is believed to have more debug traces.

  • Part Number: X02074-003

X02074-003.jpg

A21

First major update. Changed to ES3 (C00) eDRAM. Sometimes referred to as A21N1.

  • Part Number: X02056-006

X02056-006.jpg

A21N2

Very minor update from A21.

  • Part Number: X02056-008

X02056-008.jpg

A debug substrate version also exists, marked as "GPU DBG". It is believed to have more debug traces.

  • Part Number: X02074-007

X02074-007.jpg

A31

Second major update. Also shown is a slow cornering chip with the final Xbox 360 logo.

  • Part Number: X02056-009

X02056-009.jpg X02056-009-SS.jpg

A32

Minor update from A31. Engineering sample for the final production chip.

  • Part Number: X02056-010 (same as final)

X02056-010-Early.jpg