Zephyr

The Zephyr motherboard has 3 different versions with minor differences.

Zephyr_A

The Zephyr_A is the successor to the Xenon, and is used in the Original Xbox 360 series. It is the first motherboard to feature HDMI.

Notable Differences

• Redesigned and cleaned up board layout
• Removal of the Cypress clock generator (functionality integrated into HANA)
• ANA has been replaced with HANA, which adds HDMI support
• An HDMI port has been added
• Hynix is now one of the RAM vendors
• The layout and specifications of the major filtering capacitors has changed
• All manufacturers now apply glue around the CPU and GPU

Specifications

• 90nm IBM Waternoose2 CPU
• 90nm ATi Y1 GPU with integrated 90nm eDRAM
• 512MB (8x64MB) Hynix, Qimonda, or Samsung DDR3 RAM
• XSB Southbridge
• HANA
• Hynix 16MB Nand
• Boardcom or ICS Ethernet PHY

Zephyr_B

The Zephyr_B is the successor to the Zephyr_A, and is used in the Original Xbox 360 series. It is nearly identical, with exception to the GPU.

Notable Differences

• The 90nm Y1 GPU has been replaced with the 80nm Y2 GPU
• The PCIe pads under the GPU have been swapped around

Specifications

• 90nm IBM Waternoose2 CPU
• 80nm ATi Y2 GPU with integrated 90nm eDRAM
• 512MB (8x64MB) Hynix, Qimonda, or Samsung DDR3 RAM
• XSB Southbridge
• HANA
• Hynix 16MB Nand
• Boardcom or ICS Ethernet PHY

Zephyr_C

The Zephyr_C is the successor to the Zephyr_B, and is used in the Original Xbox 360 series. It is nearly identical, with exception to the GPU. The part number is the same as Zephyr_B, as the PCB itself did not change.

Notable Differences

• The 80nm Y2 GPU has been replaced with the 80nm Rhea GPU, which shrinks the eDRAM to 80nm

Specifications

• 90nm IBM Waternoose2 CPU
• 80nm ATi Rhea GPU with integrated 80nm eDRAM
• 512MB (8x64MB) Hynix, Qimonda, or Samsung DDR3 RAM
• XSB Southbridge
• HANA
• Hynix 16MB Nand
• Boardcom or ICS Ethernet PHY