Zephyr

Zephyr

A Zephyr_C
Part Number	X810385 (Zephyr_A) X810387 (Zephyr_B/C)
Introduced	Late 2006
Type	Motherboard
Used In	Xbox 360 (Original)
CPU Type	Waternoose
GPU Type	Y1 (Zephyr_A) Y2 (Zephyr_B) Rhea (Zephyr_C)
CPU Process	90nm
GPU Process	90nm (Zephyr_A) 80nm (Zephyr_B/C)
eDRAM Process	90nm (Zephyr_A/B) 80nm (Zephyr_C)
Nand Size	16MB (Retail) 64MB (Dev)
Video Outputs	A/V and HDMI
Wattage	203W
12V Amperage	16.5A
Predecessor	Xenon
Successor	Zephyr_B

The Zephyr motherboard has 3 different versions with very minor differences.

Zephyr_A

Zephyr_A is the successor to 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
• Hynix HY5RS123235BFP-14 RAM was added as an option
• Samsung K4J52324QC-BC14 RAM has been replaced with Samsung K4J52324QE-BC14
• Infineon HYB18H512321AF-13 RAM has been rebranded and replaced with Qimonda HYB18H512322AF-13
• ANA has been replaced with HANA, which adds HDMI support
• The Cypress clock generator has been removed, and its functionality has been integrated into the HANA
• An HDMI port has been added
• The layout and specifications of the major filtering capacitors has changed
• All manufacturers now apply glue around the CPU and GPU
• All manufacturers now use the extended GPU heatsink

Zephyr_B

Zephyr_B is the successor to Zephyr_A and is used in the Original Xbox 360 series.

Notable Differences

• The 90nm Y1 GPU has been replaced with the 80nm Y2 GPU
• The PCIe pads under the GPU have been de-swizzled in order to support the Y2 GPU.

Zephyr_C

Zephyr_C is the successor to Zephyr_B and is used in the Original Xbox 360 series. 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

Common

Specifications

• 90nm IBM Waternoose DD3.0 CPU
• GPU
  • 90nm ATi Y1 GPU with integrated 90nm NEC eDRAM (Zephyr_A)
  • 80nm ATi Y2 GPU with integrated 90nm NEC eDRAM (Zephyr_B)
  • 80nm ATi Rhea GPU with integrated 80nm NEC eDRAM (Zephyr_C)
• 512MB GDDR3 RAM
  • 8x64MB Hynix HY5RS123235BFP-14
  • 8x64MB Qimonda HYB18H512322AF-13
  • 8x64MB Samsung K4J52324QE-BC14
• XSB R0 Southbridge
• HANA
• Nand
  • 16MB Hynix HY27US08281A (Retail)
  • 64MB Samsung K9F1208U0B (Dev)
• Boardcom or ICS Ethernet PHY
• Heatpipe CPU Heatsink
• Extended GPU Heatsink