GPU: Difference between revisions

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== Versions ==
== Versions ==
=== Y1 (90nm) ===
{{Main|Y1 (GPU)}}
The initial version of the GPU, known as '''[[Y1 (GPU)|Y1]]''', entered production in 2005 and is used on the [[Xenon (Motherboard)|Xenon]] and [[Zephyr#Zephyr_A|Zephyr_A]] motherboards. Initial versions were defective while later versions became reliable.
=== Y2 (80nm) ===
{{Main|Y2 (GPU)}}
In 2007, the GPU was shrunk to 80nm, while the eDRAM remained at 90nm. Known as '''[[Y2 (GPU)|Y2]]''', it is used on the [[Zephyr#Zephyr_B|Zephyr_B]] motherboard.
=== Rhea (80nm) ===
{{Main|Rhea (GPU)}}
Later in 2007, the GPU was revised with an 80nm eDRAM. Known as '''[[Rhea (GPU)|Rhea]]''', it is used on the [[Zephyr#Zephyr_C|Zephyr_C]] and [[Falcon]] motherboards. Later versions of the chip were the first chips installed on newly produced consoles to be reliable. Multiple versions of Rhea were created as Microsoft experimentated during the attempts to make the chip reliable.


{{Motherboard Components}}
{{Motherboard Components}}
[[Category:Motherboard Components]]
[[Category:Motherboard Components]]

Revision as of 20:16, 2 January 2023

Xenos
X02056-010.jpg
The original Xenos, Y1
IntroducedLate 2005
Designed ByATi
Microsoft
NEC (eDRAM)
CodenameATi C1
TypeGPU
Used InOriginal Xbox 360
Clock Speed500MHz
Memory10MB eDRAM
SuccessorXCGPU

Xenos, codenamed C1, is the graphics processor, northbridge, and memory controller used in the Xbox 360. It also has an NEC designed eDRAM which contains additional logic.

The processor was developed by Microsoft and ATi, and the first version was codenamed Y1, which stands for Year 1.

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

eDRAM

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

Versions

Y1 (90nm)

The initial version of the GPU, known as Y1, entered production in 2005 and is used on the Xenon and Zephyr_A motherboards. Initial versions were defective while later versions became reliable.

Y2 (80nm)

In 2007, the GPU was shrunk to 80nm, while the eDRAM remained at 90nm. Known as Y2, it is used on the Zephyr_B motherboard.

Rhea (80nm)

Later in 2007, the GPU was revised with an 80nm eDRAM. Known as Rhea, it is used on the Zephyr_C and Falcon motherboards. Later versions of the chip were the first chips installed on newly produced consoles to be reliable. Multiple versions of Rhea were created as Microsoft experimentated during the attempts to make the chip reliable.