Waternoose

Waternoose

Waternoose1
File:X02046.jpg Waternoose2 (X02046)
File:X806416.jpg Waternoose2 (X806416)
Part Number	X02046 X806416
Introduced	2005
Designed By	IBM Microsoft
Type	XCPU
Used In	Xenon Zephyr
Clock Speed	2.8-3.2GHz
Cache	L1: 32KB/32KB L2: 1MB
Instruction Set	PowerPC RISC
Cores	3
Threads	6
Process	90nm
TDP	75W/85W
Package	Flip-chip BGA899
Successor	Loki

The Waternoose series are the original production model of the XCPU used in the Xbox 360. They have 75W TDPs and are manufactured on the 90nm process.

Specifications

• 3 two-way SMD-capable RISC cores clocked at 3.2GHz
• SIMD: Two VMX128 units
• 32KB L1 data cache
• 32KB L1 instruction cache
• 1MB L2 cache at 1.6 GHz with a 256-bit bus
• 21.6GB/s FSB
• 768 bits of IBM eFUSE One-Time-Program memory for fusesets
• One-Time-Programmable ROM and 64KB SRAM for the 1BL and Config Ring
• Big-endian architecture
• 90nm process
• TDP: 75W/85W

Details

Waternoose1

Waternoose1 is the engineering sample of the XCPU, labelled XCPU-ES. It runs at 2.8GHz as opposed to the final speed of 3.2GHz. The ROM does not contain a 1BL, and thus these CPUs can only boot with a Titan board, which injects the 1BL. Waternoose1 still has the original Xbox logo as it was created before the Xbox 360 name was chosen. Waternoose1 is sometimes called "DD1.0"

• Part Number: X02046-001
• Foundry: Canada Foundry

Waternoose2

Waternoose2 is the production version of the XCPU running at 3.2GHz. There are 2 versions of the chip with different part numbers. It is not known what the difference between these two chips are. Waternoose2 also contains a programmed ROM containing the 1BL. Versions of Waternoose2 with part number X02046-002 used in certain pre-final consoles were still labelled "XCPU-ES" and still had the original Xbox logo. Waternoose2 is sometimes called "DD2.0". The "DD2.1" version reduced the TDP to 75W from the initial 85W.

• Part Numbers:
  • X02046 (except -001)
  • X806416
• Foundries:
  • Canada Foundry