Xenon (Motherboard)/Prototypes

There are 12 major prototypes of the Xenon motherboard. The production board is the 11th version, Fab K, (-011).

The following will describe typical or known build-ups, however build-ups will vary depending on ConfigID.

Fab A (-001)

First motherboard. Used with Willow and Alpha kits, with or without Shiva CPU. Typically has no GPU. Various Southbridge and ANA versions.

• Part Number: X801054-001

Fab B (-002)

First fully working motherboard. Typically uses Shiva CPU and A11N1 or A11N2 GPU. Various Southbridge and ANA versions. Introduces optional Backup Clock Generator.

• Part Number: X801054-002

The following image has been upscaled for clarity:

Fab C (-003)

Not taped out. Purpose not known.

• Part Number: X801054-003

Fab D (-004)

Updated Voltage Regulation. Little else is known.

• Part Number: X801054-004

Fab E (-005)

First motherboard to use Waternoose DD1 CPU out of the factory. Typically uses A11N2 GPU, E2 Southbridge, and B00 ANA. Removes Shiva support.

• Part Number: X801054-005

Fab F (-006)

Updated Voltage Regulation. Little else is known.

• Part Number: X801054-006

Fab G (-007)

The first PCB used for Beta refresh apart of the Partner program. Typically uses Waternoose DD1 CPU, A11N2 or A21N2 GPU, E2 or G0 Southbridge, and B00 ANA. Removes several Debug LEDs.

• Part Number: X801054-007

Fab H (-008)

First motherboard to use Waternoose DD2 CPU out of the factory. Typically uses A32 GPU. Uses G0 Southbridge and B02 ANA. Most CPUs are fused to 3.2GHz. Significant minor fixes.

• Part Number: X801054-008

Fab J (-009)

Part number changed to X803600. Uses Waternoose DD2 CPU, A32 GPU, G0 Southbridge, and B02 ANA. The CPU is fused to 2.8GHz or 3.2GHz. Fixed easily breakable IR sensor. Removes Titan support and almost all Debug LEDs. Adds additional but unused fan header. Most boards have an X-patch applied to fix a bug in GPU A32. Many 2.8GHz fused units were refurbished with 3.2GHz fused CPUs and used as Development Kits.

• Part Number: X803600-009

Fab J Prime (-010)

Derivative of Fab J, but 6-layer board. The PCB color is purple. Uses Waternoose DD2 CPU, A32 GPU, G0 Southbridge, and B02 ANA. The CPU is fused to 3.2GHz. The purpose of this board is unknown.

• Part Number: X803600-010

Fab K (-011)

Main article: Xenon (Motherboard)

The final motherboard. See Xenon (Motherboard) for details. Integrates the GPU A32 X-patch into the motherboard.

• Part Number: X803600-011

Fab M (-012)

Only used internally. Some versions are 6-layer boards with top-side test-points added for POST_OUT. Otherwise, identical to Fab K.

• Part Number: X803600-012

The following image is a 4-layer Fab M without added test-points: