Stepping

Processor silicon revisions are denoted by their stepping. Known steppings used on the Xbox 360 are listed below.

XCPU

Waternoose

Main article: Waternoose

X02046

• A00 - DD1
• B00 - Production DD2
• B01 - Production DD2.1

X806416

• A00 - Production DD3

Loki

Main article: Loki

• A01 - Production

GPU

Y1

Main article: Y1 (GPU)

• A11
  • A11N1
  • A11N2
• A21
  • A21N1
  • A21N2
• A22
• A31
• A32 - Production

Y2

Main articles: Y2 (GPU) and Rhea

• B11
• B11L
• B12
• B12L
• B13L - Production
• B14L - Production

Y3

Main articles: Zeus and Kronos

• C11
• C12
• C21
• C22 - Production
• C23 - Production

eDRAM

Edifis

Main article: Edifis

• ES1 (A00)
• ES2 (B00)
• ES3 (C00) - Production

Styx

Main article: Styx

• FS11
• FS21 - 80nm Production
• GS21 - 65nm Production

XCGPU

Valhalla

Main article: Valhalla

• A01
• A02 - Production

Winchester CGPU

Main article: Winchester CGPU

• A03 - Production

Southbridge

XSB

Main article: XSB

• E2
• G0 - Production
• R0 - Production

PSB

Main article: PSB

• A0 - Production

ANA

Main article: ANA

• A00
• B00
• B01
• B02
• B03 - Production
• C00 - Cancelled

HANA

Main article: HANA

• A00
• B00 - Production